Initial commit

DCT.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Tue Jun 11 17:10:43 2019
+
+@author: Administrator
+"""
+
+
+import cv2
+import numpy as np
+
+
+img = cv2.imread('a.png',0)
+img1 = img.astype('float')
+ 
+def dct(m):
+    m = np.float32(m)/255.0
+    return cv2.dct(m)*255
+#print(dct(img1).shape)
+new_dct=dct(img1)
+after_dct=[]
+for i in range(len(new_dct)):
+    for j in range(len(new_dct[0])):
+        after_dct.append(int(new_dct[i][j]))
+#print(new_dct)
+#new_dct=new_dct.reshape(-1,1)
+#print(len(after_dct))
+#print(after_dct[:600])
+
+
+    

F3.py

@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Mon Jun 10 17:30:40 2019
+
+@author: Administrator
+"""
+
+from Jsteg import Jsteg
+
+ 
+class F3(Jsteg):
+    def __init__(self):
+        Jsteg.__init__(self)
+ 
+    def set_sequence_after_dct(self,sequence_after_dct):
+        self.sequence_after_dct=sequence_after_dct
+        sum_len=len(self.sequence_after_dct)
+        zero_len=len([i for i in self.sequence_after_dct if i==0])
+        one_len=len([i for i in self.sequence_after_dct if i in (-1,1)])
+        self.available_info_len=sum_len-zero_len-one_len # 不是特别可靠
+        print ("Load>> 大约可嵌入",sum_len-zero_len-int(one_len/2),'bits')
+        print ("Load>> 最少可嵌入",self.available_info_len,'bits\n')
+ 
+    def _write(self,index,data):
+        origin=self.sequence_after_dct[index]
+        if origin == 0:
+            return False
+        elif origin in (-1,1) and data==0:
+            self.sequence_after_dct[index]=0
+            return False
+ 
+        lower_bit=origin%2
+ 
+        if lower_bit==data:
+            pass
+        elif origin>0:
+            self.sequence_after_dct[index]=origin-1
+        elif origin<0:
+            self.sequence_after_dct[index]=origin+1
+        return True
+ 
+    def _read(self,index):
+        if self.sequence_after_dct[index] != 0:
+            return self.sequence_after_dct[index]%2
+        else:
+            return None
+ 
+ 
+if __name__=="__main__":
+    f3=F3()
+    # 写
+    sequence_after_dct=[-1,0,1]*100+[i for i in range(-7,500)]
+    f3.set_sequence_after_dct(sequence_after_dct)
+    info1=[0,1,0,1,1,0,1,0]
+    f3.write(info1)
+    # 读
+    sequence_after_dct2=f3.get_sequence_after_dct()    
+    f3.set_sequence_after_dct(sequence_after_dct2)
+    info2=f3.read()
+    print (info2)

F4.py

@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Tue Jun 11 16:10:51 2019
+
+@author: Administrator
+"""
+
+from Jsteg import Jsteg
+
+ 
+class F4(Jsteg):
+    def __init__(self):
+        Jsteg.__init__(self)
+ 
+    def set_sequence_after_dct(self,sequence_after_dct):
+        self.sequence_after_dct=sequence_after_dct
+        sum_len=len(self.sequence_after_dct)
+        zero_len=len([i for i in self.sequence_after_dct if i==0])
+        one_len=len([i for i in self.sequence_after_dct if i in (-1,1)])
+        self.available_info_len=sum_len-zero_len-one_len # 不是特别可靠
+        print ("Load>> 大约可嵌入",sum_len-zero_len-int(one_len/2),'bits')
+        print ("Load>> 最少可嵌入",self.available_info_len,'bits\n')
+ 
+    def _write(self,index,data):
+        origin=self.sequence_after_dct[index]
+        if origin == 0:
+            return False
+        elif origin == 1 and data==0:
+            self.sequence_after_dct[index]=0
+            return False
+        
+        elif origin == -1 and data==1:
+            self.sequence_after_dct[index]=0
+            return False
+        
+        lower_bit=origin%2
+        
+        if origin >0:
+            if lower_bit!=data:
+                self.sequence_after_dct[index]=origin-1
+        else:
+            if lower_bit==data:
+                self.sequence_after_dct[index]=origin+1
+        return True
+
+ 
+    def _read(self,index):
+        if self.sequence_after_dct[index] >0:
+            return self.sequence_after_dct[index]%2
+        elif self.sequence_after_dct[index]<0:
+            return (self.sequence_after_dct[index]+1)%2
+        else:
+            return None
+ 
+ 
+if __name__=="__main__":
+    f4=F4()
+    # 写
+    sequence_after_dct=[-1,0,1]*100+[i for i in range(-7,500)]
+    f4.set_sequence_after_dct(sequence_after_dct)
+    info1=[0,1,0,1,1,0,1,0]
+    f4.write(info1)
+    # 读
+    sequence_after_dct2=f4.get_sequence_after_dct()    
+    f4.set_sequence_after_dct(sequence_after_dct2)
+    info2=f4.read()
+    print (info2)

Jsteg.py

@@ -0,0 +1,128 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Mon Jun 10 15:26:43 2019
+
+@author: Administrator
+"""
+
+import math
+ 
+class Jsteg:
+    def __init__(self):
+        self.sequence_after_dct=None
+ 
+    def set_sequence_after_dct(self,sequence_after_dct):
+        self.sequence_after_dct=sequence_after_dct
+        self.available_info_len=len([i for i in self.sequence_after_dct if i not in (-1,1,0)]) # 不是绝对可靠的
+        print ("Load>> 可嵌入",self.available_info_len,'bits')
+     
+    def get_sequence_after_dct(self):
+        return self.sequence_after_dct
+ 
+    def write(self,info):
+        """先嵌入信息的长度，然后嵌入信息"""
+        info=self._set_info_len(info)
+        info_len=len(info)
+        info_index=0
+        im_index=0
+        while True:
+            if info_index>=info_len:
+                break
+            data=info[info_index]
+            if self._write(im_index,data):
+                info_index+=1
+            im_index+=1
+ 
+ 
+    def read(self):
+        """先读出信息的长度，然后读出信息"""
+        _len,sequence_index=self._get_info_len()
+        info=[]
+        info_index=0
+ 
+        while True:
+            if info_index>=_len:
+                break
+            data=self._read(sequence_index)
+            if data!=None:
+                info.append(data)
+                info_index+=1
+            sequence_index+=1
+ 
+        return info
+ 
+    #===============================================================#
+ 
+    def _set_info_len(self,info):
+        l=int(math.log(self.available_info_len,2))+1
+        info_len=[0]*l
+        _len=len(info)
+        info_len[-len(bin(_len))+2:]=[int(i) for i in bin(_len)[2:]]
+        return info_len+info
+ 
+    def _get_info_len(self):
+        l=int(math.log(self.available_info_len,2))+1
+        len_list=[]
+        _l_index=0
+        _seq_index=0
+        while True:
+            if _l_index>=l:
+                break
+            _d=self._read(_seq_index)
+            if _d!=None:
+                len_list.append(str(_d))
+                _l_index+=1
+            _seq_index+=1
+        _len=''.join(len_list)
+        _len=int(_len,2)
+        return _len,_seq_index
+    
+    # 注意经过DCT会有负值，此处最低有效位的嵌入方式与空域LSB略有不同
+    def _write(self,index,data):
+        origin=self.sequence_after_dct[index]
+        if origin in (-1,1,0):
+            return False
+ 
+        lower_bit=origin%2
+        if lower_bit==data:
+            pass
+        elif origin>0:
+            if (lower_bit,data) == (0,1):
+                self.sequence_after_dct[index]=origin+1
+            elif (lower_bit,data) == (1,0):
+                self.sequence_after_dct[index]=origin-1
+        elif origin<0:
+            if (lower_bit,data) == (0,1):
+                self.sequence_after_dct[index]=origin-1
+            elif (lower_bit,data) == (1,0):
+                self.sequence_after_dct[index]=origin+1
+ 
+        return True
+ 
+    def _read(self,index):
+        if self.sequence_after_dct[index] not in (-1,1,0):
+            return self.sequence_after_dct[index]%2
+        else:
+            return None
+'''
+import cv2
+import numpy as np
+ 
+def dct(m):
+    m = np.float32(m)/255.0
+    return cv2.dct(m)*255
+'''
+
+if __name__=="__main__":
+    jsteg=Jsteg()
+    # 写
+    sequence_after_dct=[-1,0,1]*100+[i for i in range(-7,500)]
+    #print(sequence_after_dct)
+    jsteg.set_sequence_after_dct(sequence_after_dct)
+    info1=[0,1,0,1,1,0,1,0]
+    jsteg.write(info1)
+    sequence_after_dct2=jsteg.get_sequence_after_dct()
+    # 读
+    jsteg.set_sequence_after_dct(sequence_after_dct2)
+    info2=jsteg.read()
+    print (info2)

LSB/flag.txt

@@ -0,0 +1 @@
+dajkhfahjkf

LSB/get_flag.txt

@@ -0,0 +1 @@
+dajkhfahjkf

LSB/get_info.py

@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Sun May 19 12:43:26 2019
+
+@author: Administrator
+"""
+
+from PIL import Image
+
+def mod(x,y): 
+    return x%y
+
+def toasc(strr):
+    return int(strr, 2)
+        
+         
+#le为所要提取的信息的长度，str1为加密载体图片的路径，str2为提取文件的保存路径
+def func(le,str1,str2): 
+    b="" 
+    im = Image.open(str1)
+    lenth = le*8
+    width,height = im.size[0],im.size[1]
+    count = 0
+    for h in range(height): 
+        for w in range(width):
+            #获得(w,h)点像素的值
+            pixel = im.getpixel((w, h))
+            #此处余3，依次从R、G、B三个颜色通道获得最低位的隐藏信息 
+            if count%3==0:
+                count+=1 
+                b=b+str((mod(int(pixel[0]),2))) 
+                if count ==lenth:
+                    break
+            if count%3==1:
+                count+=1
+                b=b+str((mod(int(pixel[1]),2)))
+                if count ==lenth:
+                    break
+            if count%3==2: 
+                count+=1
+                b=b+str((mod(int(pixel[2]),2)))
+                if count ==lenth:
+                    break
+        if count == lenth:
+            break
+ 
+    with open(str2,"w",encoding='utf-8') as f: 
+        for i in range(0,len(b),8):
+            #以每8位为一组二进制，转换为十进制            
+            stra = toasc(b[i:i+8]) 
+            #将转换后的十进制数视为ascii码，再转换为字符串写入到文件中
+            #print((stra))
+            f.write(chr(stra))
+    print("完成信息提取！")
+
+
+
+
+def main():   
+    #文件长度 
+    le = 11
+    #含有隐藏信息的图片 
+    new = "new.png" 
+    #信息提取出后所存放的文件
+    get_info = "get_flag.txt"
+    func(le,new,get_info)
+    
+if __name__=='__main__':
+    main()

LSB/hide_info.py

@@ -0,0 +1,85 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Sun May 19 11:20:05 2019
+
+@author: Administrator
+"""
+
+from PIL import Image
+
+
+def plus(string): 
+    #Python zfill() 方法返回指定长度的字符串，原字符串右对齐，前面填充0。
+    return string.zfill(8)
+ 
+def get_key(strr):
+    #获取要隐藏的文件内容
+    with open(strr,"rb")  as f:
+        s = f.read()
+        string=""
+        for i in range(len(s)):
+         #逐个字节将要隐藏的文件内容转换为二进制，并拼接起来 
+         #1.先用ord()函数将s的内容逐个转换为ascii码
+         #2.使用bin()函数将十进制的ascii码转换为二进制
+         #3.由于bin()函数转换二进制后，二进制字符串的前面会有"0b"来表示这个字符串是二进制形式，所以用replace()替换为空
+         #4.又由于ascii码转换二进制后是七位，而正常情况下每个字符由8位二进制组成，所以使用自定义函数plus将其填充为8位
+            string=string+""+plus(bin(s[i]).replace('0b',''))
+    #print(string) 
+    return string
+
+def mod(x,y):
+    return x%y
+
+#str1为载体图片路径，str2为隐写文件，str3为加密图片保存的路径 
+def func(str1,str2,str3):  
+    im = Image.open(str1) 
+    #获取图片的宽和高
+    width,height= im.size[0],im.size[1]
+    print("width:"+str(width))
+    print("height:"+str(height))
+    count = 0
+    #获取需要隐藏的信息 
+    key = get_key(str2) 
+    keylen = len(key)
+    for h in range(height):
+        for w in range(width):
+            pixel = im.getpixel((w,h))
+            a=pixel[0]
+            b=pixel[1]
+            c=pixel[2]
+            if count == keylen:
+                break
+            #下面的操作是将信息隐藏进去 
+            #分别将每个像素点的RGB值余2，这样可以去掉最低位的值
+            #再从需要隐藏的信息中取出一位，转换为整型
+            #两值相加，就把信息隐藏起来了
+            a= a-mod(a,2)+int(key[count])
+            count+=1
+            if count == keylen:
+                im.putpixel((w,h),(a,b,c)) 
+                break
+            b =b-mod(b,2)+int(key[count])
+            count+=1 
+            if count == keylen:
+                im.putpixel((w,h),(a,b,c)) 
+                break
+            c= c-mod(c,2)+int(key[count])
+            count+=1
+            if count == keylen:
+                im.putpixel((w,h),(a,b,c))
+                break
+            if count % 3 == 0:
+                im.putpixel((w,h),(a,b,c))
+    im.save(str3)
+    
+def main():   
+    #原图
+    old = "old.png"
+    #处理后输出的图片路径
+    new = "new.png"
+    #需要隐藏的信息 
+    enc = "flag.txt"
+    func(old,enc,new)
+    
+if __name__=='__main__':
+    main()

PDF/PDF格式.md

@@ -0,0 +1,282 @@
+# PDF格式学习
+## PDF简介
+* PDF是Portable Document Format 的缩写，可翻译为“便携文件格式”，由Adobe System Incorporated 公司在1992年发明。
+
+* PDF文件是一种编程形式的文档格式，它所有显示的内容，都是通过相应的操作符进行绘制的。 
+* PDF基本显示单元包括：文字，图片，矢量图，图片 
+* PDF扩展单元包括：水印，电子署名，注释，表单，多媒体，3D 
+* PDF动作单元：书签，超链接（拥有动作的单元有很多个，包括电子署名，多媒体等等）
+## PDF的优点
+* 一致性： 
+在所有可以打开PDF的机器上，展示的效果是完全一致，不会出现段落错乱、文字乱码这些排版问题。尤其是文档中，本身可以嵌入字体，避免了客户端没有对应字体，而导致文字显示不一致的问题。所以，在印刷行业，绝大多数用的都是PDF格式。 
+* 不易修改： 
+用过PDF文件的人，都会知道，对已经保存之后的PDF文件，想要进行重新排版，基本上就不可能的，这就保证了从资料源发往外界的资料，不容易被篡改。 
+* 安全性： 
+PDF文档可以进行加密，包括以下几种加密形式：文档打开密码，文档权限密码，文档证书密码，加密的方法包括：RC4，AES，通过加密这种形式，可以达到资料防扩散等目的。 
+* 不失真： 
+PDF文件中，使用了矢量图，在文件浏览时，无论放大多少倍，都不会导致使用矢量图绘制的文字，图案的失真。 
+* 支持多种压缩方式： 
+为了减少PDF文件的size，PDF格式支持各种压缩方式： asciihex，ascii85，lzw，runlength，ccitt，jbig2，jpeg(DCT)，jpeg2000(jpx) 
+* 支持多种印刷标准： 
+支持PDF-A，PDF-X
+
+## PDF格式
+根据PDF官方指南，理解PDF格式可以从四个方面下手——**Objects**（对象）、**File structure**（物理文件结构）、**Document structure**（逻辑文件结构）、**Content streams**（内容流）。
+
+### 对象
+
+### 物理文件结构
+* 整体上分为文件头（Header）、对象集合（Body）、交叉引用表（Xref table）、文件尾（Trailer）四个部分，结构如图。修改过的PDF结构会有部分变化。
+* 未经修改
+![未经修改](https://img-blog.csdnimg.cn/20190526170017719.png#pic_center)
+* 经修改
+![在这里插入图片描述](https://img-blog.csdnimg.cn/20190526170402806.png#pic_center)
+#### 文件头
+* 文件头是PDF文件的第一行,格式如下: 
+```
+%PDF-1.7
+```
+* 这是个固定格式，表示这个PDF文件遵循的PDF规范版本，解析PDF的时候尽量支持高版本的规范，以保证支持大多数工具生成的PDF文件。1.7版本支持1.0-1.7之间的所有版本。
+
+#### 对象集合
+* 这是一个PDF文件最重要的部分，文件中用到的所有对象,包括文本、图象、音乐、视频、字体、超连接、加密信息、文档结构信息等等,都在这里定义。格式如下: 
+```
+2 0 obj
+        ...
+end obj
+```
+* 一个对象的定义包含4个部分：前面的2是**对象序号**，其用来唯一标记一个对象；0是**生成号**，按照PDF规范，如果一个PDF文件被修改，那这个数字是累加的，它和对象序号一起标记是原始对象还是修改后的对象，但是实际开发中，很少有用这种方式修改PDF的，都是重新编排对象号；obj和endobj是对象的定义范围，可以抽象的理解为这就是一个左括号和右括号；省略号部分是PDF规定的任意合法对象。
+* 可以通过R关键字来引用任何一个对象，比如要引用上面的对象，可以使用2 0 R，需要主意的是，R关键字不仅可以引用一个已经定义的对象，还可以引用一个并**不存在的对象**，而且效果就和引用了一个空对象一样。
+*  对象主要有下面几种
+   * **booleam**
+用关键字true或false表示，可以是array对象的一个元素,或dictionary对象的一个条目。也可以用在PostScript计算函数里面，做为if或if esle的一个条件。
+   * **numeric**
+包括整形和实型，不支持非十进制数字，不支持指数形式的数字。
+    例:
+    1)整数 123   4567   +111   -2
+    范围:正2的31次方-1到负的2的31次方
+    2)实数 12.3   0.8   +6.3   -4.01   -3.   +.03
+    范围:±3.403 ×10的38次方 ±1.175 × 10的-38次方
+       * 注意:如果整数超过表示范围将转化成实数,如果实数超过范围就会出错
+   * **string**
+由一系列0-255之间的字节组成，一个string总长度不能超过65535.string有以下两种方式：
+     * 十六进制字串
+由<>包含起来的一个16进制串，两位表示一个字符,不足两位用0补齐。
+例: \<Aabb> 表示AA和BB两个字符  \<AAB> 表示AA和B0两个字符
+      * 直接字串
+由()包含起来的一个字串,中间可以使用转义符"/"。 
+例：
+ (abc) 表示abc   
+ (a//) 表示a/  
+转义符的定义如下：
+
+|转义字符|	含义|	
+|--------|--------|
+|/n	|换行|
+/r	|回车
+/t	|水平制表符
+/b	|退格
+/f	|换页（Form feed (FF)）
+/(	|左括号
+/)	|右括号
+//	|反斜杠
+/ddd	|八进制形式的字符
+
+
+* 对象类别（续）
+
+  * **name**
+    由一个前导/和后面一系列字符组成，最大长度为127。和string不同的是，name是**不可分割**的并且是**唯一**的，不可分割就是说一个name对象就是一个原子，比如/name，不能说n就是这个name的一个元素；唯一就是指两个相同的name一定代表同一个对象。从pdf1.2开始，除了ascii的0，别的都可以用一个#加两个十六进制的数字表示。
+    例:  
+    /name 表示name  
+    /name#20is 表示name is  
+    /name#200 表示name 0
+   * **array**
+用[]包含的一组对象，可以是任何pdf对象(包括array)。虽然pdf只支持一维array，但可以通过array的嵌套实现任意维数的array(但是一个array的元素不能超过8191)。
+    例：[549   3.14   false   (Ralph)   /SomeName]  
+  * **Dictionary**
+    用"<<"和">>"包含的若干组条目，每组条目都由key和value组成，其中key必须是name对象，并且一个dictionary内的key是唯一的；value可以是任何pdf的合法对象(包括dictionary对象)。
+    例：
+    ```
+    <<  /IntegerItem   12
+        /StringItem   (a   string)
+        /Subdictionary
+        <<  /Item1   0.4
+            /Item2   true
+            /LastItem   (not!)
+            /VeryLastItem   (OK)
+        >>
+    >>
+    ```
+   * **stream**
+    由一个字典和紧跟其后面的一组关键字stream和endstream以及这组关键字中间包含一系列字节组成。内容和string很相似，但有区别：stream可以分几次读取，分开使用不同的部分，string必须作为一个整体一次全部读取使用；string有长度限制，但stream却没有这个限制。一般较大的数据都用stream表示。需要注意的是，stream必须是间接对象，并且stream的字典必须是直接对象。从1.2规范以后，stream可以以外部文件形式存在，这种情况下，解析PDF的时候stream和endstream之间的内容就被忽略掉。
+     例:
+      ```
+      dictionary
+      stream
+      …data…
+      endstream
+      ```
+     stream字典中常用的字段如下：
+
+      |字段名	|类型|	值|
+      |--------|--------|--------|
+      |Length|	整形|（必须）关键字stream和endstream之间的数据长度，endstream之前可能会有一个多余的EOL标记，这个不计算在数据的长度中。
+     Filter	|名字 或 数组	|（可选）Stream的编码算法名称（列表）。如果有多个，则数组中的编码算法列表顺序就是数据被编码的顺序。
+     DecodeParms	|字典 或 数组	|（可选)一个参数字典或由参数字典组成的一个数组，供Filter使用。如果仅有一个Filter并且这个Filter需要参数，除非这个Filter的所有参数都已经给了默认值，否则的话   DecodeParms必须设置给Filter。如果有多个Filter，并且任意一个Filter使用了非默认的参数， DecodeParms 必须是个数组，每个元素对应一个Filter的参数列表（如果某个Filter无需参数或所有参数都有了默认值，就用空对象代替）。 如果没有Filter需要参数，或者所有Filter的参数都有默认值，DecodeParms 就被忽略了。
+     F	|文件标识	|（可选)保存stream数据的文件。如果有这个字段， stream和endstream就被忽略，FFilter将会代替Filter, FDecodeParms将代替DecodeParms。Length字段还是表示stream和endstream之间数据的长度，但是通常此刻已经没有数据了，长度是0.
+     FFilter	|名字 或 字典|	(可选)和filter类似，针对外部文件。
+     FDecodeParms	|字典 或 数组|	(可选)和DecodeParams类似，针对外部文件。
+     
+   
+   
+Stream的编码算法名称（列表）。如果有多个，则数组中的编码算法列表顺序就是数据被编码的顺序。且需要被编码。编码算法主要如下：
+     ![在这里插入图片描述](https://img-blog.csdnimg.cn/20190526185703968.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x5YzQ0ODEzNDE4,size_16,color_FFFFFF,t_70)
+编码可视化主要显示为乱码，所以提供了隐藏信息的机会,如下图的steam内容为乱码。
+     ![在这里插入图片描述](https://img-blog.csdnimg.cn/20190526185800381.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x5YzQ0ODEzNDE4,size_16,color_FFFFFF,t_70#pic_center)   
+    * **NULL**
+    用null表示，代表空。如果一个key的值为null，则这个key可以被忽略；如果引用一个不存在的object则等价于引用一个空对象。
+
+#### 交叉引用表
+* 交叉引用表是PDf文件内部一种特殊的文件组织方式，可以很方便的根据对象号随机访问一个对象。其格式如下: 
+```
+    xref
+  	0 1
+  	0000000000   65535   f
+  	4 1
+    0000000009   00000   n
+  	8 3
+    0000000074   00000   n
+  	0000000120   00000   n
+  	0000000179   00000   n
+```
+ * 其中,xref是开始标志,表示以下为一个交叉引用表的内容;每个交叉引用表又可以分为若干个子段，每个子段的第一行是两个数字，第一个是对象起始号，后面是连续的对象个数，接着每行是这个子段的每个对象的具体信息——每行的前10个数字代表这个这个对象**相对文件头的偏移地址**,后面的5位数字是**生成号**（用于标记PDF的更新信息，和对象的生成号作用类似），最后一位f或n表示对象是否被使用(n表示使用,f表示被删除或没有用)。上面这个交叉引用表一共有3个子段，分别有1个，1个，3个对象，第一个子段的对象不可用，其余子段对象可用。
+####  文件尾
+* 通过trailer可以快速的找到交叉引用表的位置，进而可以精确定位每一个对象；还可以通过它本身的字典还可以获取文件的一些全局信息（作者，关键字，标题等），加密信息，等等。具体形式如下:
+```
+  	trailer
+  	<<
+    	key1   value1
+    	key2   value2
+    	key3   value3
+        …
+  	>>
+  	startxref
+  	553
+  	%%EOF
+  ```
+
+
+
+
+* trailer后面紧跟一个字典，包含若干键-值对。具体含义如下：
+
+|键	|值类型|	值说明|
+|--------|--------|--------|
+|Size|	整形数字|	所有间接对象的个数。一个PDF文件，如果被更新过，则会有多个对象集合、交叉引用表、trailer，最后一个trailer的这个字段记录了之前所有对象的个数。这个值必须是直接对象。|
+|Prev	|整形数字|	当文件有多个对象集合、交叉引用表和trailer时，才会有这个键，它表示前一个相对于文件头的偏移位置。这个值必须是直接对象。|
+|Root	|字典	|Catalog字典（文件的逻辑入口点）的对象号。必须是间接对象。|
+|Encrypt	|字典|	文档被保护时，会有这个字段，加密字典的对象号。|
+|Info	|字典	|存放文档信息的字典，必须是间接对象。|
+|ID	|数组	|文件的ID|
+
+* 上面代码中的startxref：后面的数字表示最后一个交叉引用表相对于文件起始位置的偏移量   
+* %%EOF：文件结束符
+### 逻辑文件结构
+![在这里插入图片描述](https://img-blog.csdnimg.cn/20190526185950801.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x5YzQ0ODEzNDE4,size_16,color_FFFFFF,t_70#pic_center)
+
+#### catalog根节点
+* catalog是整个PDF逻辑结构的根节点，这个可以通过trailer的Root字段定位，虽然简单，但是相当重要，因为这里是PDF文件物理结构和逻辑结构的连接点。Catalog字典包含的信息非常多，这里仅就最主要的几个字段做个说明。
+     *  Pages字段
+这是个必须字段，是PDF里面所有页面的描述集合。Pages字段本身是个字典，它里面又包含了一下几个主要字段：
+    
+    |字段	|类型	|值|
+    |--------|--------|--------|
+    Type	|name|	(必须)只能为Pages 。
+    Parent	|dictionary	|(如果不是catalog里面指定的跟节点，则必须有，并且必须是间接对象) 当前节点的直接父节点。
+    Kids	|array	|(必须)一个间接对象组成的数组，节点可能是page或page tree。
+    Count	|integer|	(必须) page tree里面所包含叶子节点（page 对象）的个数。
+    
+    从以上字段可以看出，Pages最主要的功能就是组织所有的page对象。Page对象描述了一个PDF页面的属性、资源等信息。Page对象是一个字典，它主要包含一下几个重要的属性：
+    
+ |字段	|类型	|值|
+|--------|--------|--------|
+Type	|name	|(必须)必须是Page。
+Parent	|dictionary|	(必须；并且只能是间接对象)当前page节点的直接父节点page tree 。
+LastModified|	date|	(如果存在PieceInfo字段，就必须有，否则可选)记录当前页面被最后一次修改的日期和时间。
+Resources|	dictionary|	(必须; 可继承)记录了当前page用到的所有资源。如果当前页不用任何资源，则这是个空字典。忽略所有字段则表示继承父节点的资源。
+MediaBox	|rectangle|	(必须; 可继承)定义了要显示或打印页面的物理媒介的区域（default user space units）
+CropBox	|rectangle|	(可选; 可继承)定义了一个可视区域，当前页被显示或打印的时候，它的内容会被这个区域裁剪。默认值就是 MediaBox。
+BleedBox|rectangle	|(可选) 定义了一个区域，当输出设备是个生产环境（ production environment）的时候，页面显示的内容会被裁剪。默认值是 CropBox.
+Contents	|stream or array|	(可选) 描述页面内容的流。如果这个字段缺省，则页面上什么也不会显示。这个值可以是一个流，也可以是由几个流组成的一个数组。如果是数组，实际效果相当于所有的流是按顺序连在一起的一个流，这就允许PDF生成的时候可以随时插入图片或其他资源。流之间的分割只是词汇上的一个分割，并不是逻辑上或者组织形式的切割。
+Rotate	|integer|	(可选; 可继承) 顺时钟旋转的角度数，这个必须是90的整数倍，默认是0。
+Thumb|	stream	|(可选)定义当前页的缩略图。
+Annots|	array|	(可选) 和当前页面关联的注释。
+Metadata	|stream|	(可选) 当前页包含的元数据。
+一个简单例子：
+```
+3 0 obj
+       << /Type /Page
+           /Parent 4 0 R
+           /MediaBox [ 0 0 612 792 ]
+           /Resources <</Font<<
+                        /F3 7 0 R /F5 9 0 R /F7 11 0 R
+                             >>
+                        /ProcSet [ /PDF ]
+                       >>
+           /Contents 12 0 R
+           /Thumb 14 0 R
+           /Annots [ 23 0 R 24 0 R]
+         >> 
+endobj
+```
+* Outlines字段
+Outline是PDF里面为了方便用户从PDF的一部分跳转到另外一部分而设计的，有时候也叫书签（Bookmark），它是一个树状结构，可以直观的把PDF文件结构展现给用户。用户可以通过鼠标点击来打开或者关闭某个outline项来实现交互，当打开一个outline时，用户可以看到它的所有子节点，关闭一个outline的时候，这个outline的所有子节点会自动隐藏。并且，在点击的时候，阅读器会自动跳转到outline对应的页面位置。Outlines包含以下几个字段：
+
+ |字段	|类型	|值|
+|--------|--------|--------|
+Type	|name	|(可选)如果这个字段有值，则必须是Outlines。
+First	|dictionary	|(必须;必须是间接对象) 第一个顶层Outline item。
+Last	|dictionary	|(必须;必须是间接对象)最后一个顶层outline item。
+Count	|integer	|(必须)outline的所有层次的item的总数。
+
+Outline是一个管理outline item的顶层对象，我们看到的，其实是outline item，这个里面才包含了文字、行为、目标区域等等。一个outline item主要有一下几个字段：
+
+ |字段	|类型	|值|
+|--------|--------|--------|
+Title	|text string|	(必须)当前item要显示的标题。
+Parent	|dictionary	|(必须;必须是间接对象) outline层级中，当前item的父对象。如果item本身是顶级item，则父对象就是它本身。
+Prev|	dictionary|	(除了每层的第一个item外，其他item必须有这个字段;必须是间接对象)当前层级中，此item的前一个item。
+Next	|dictionary|	(除了每层的最后一个item外，其他item必须有这个字段;必须是间接对象)当前层级中，此item的后一个item。
+First	|dictionary|	(如果当前item有任何子节点，则这个字段是必须的;必须是间接对象) 当前item的第一个直接子节点。
+Last	|dictionary|	(如果当前item有任何子节点，则这个字段是必须的;必须是间接对象) 当前item的最后一个直接子节点。
+Dest	|name,byte string, or array	|(可选; 如果A字段存在，则这个不能被会略)当前的outline item被激活的时候，要显示的区域。
+A	|dictionary|	(可选; 如果Dest 字段存在，则这个不能被忽略)当前的outline item被激活的时候，要执行的动作。
+
+* URI字段
+URI（uniform resource identifier)，定义了文档级别的统一资源标识符和相关链接信息。目录和文档中的链接就是通过这个字段来处理的.
+* Metadata字段
+文档的一些附带信息，用xml表示，符合adobe的xmp规范。这个可以方便程序不用解析整个文件就能获得文件的大致信息。
+* 其他
+Catalog字典中，常用的字段一般有以下一些：
+
+ |字段	|类型	|值|
+|--------|--------|--------|
+Type	|name|	(必须)必须为Catalog。
+Version|	name	|(可选)PDF文件所遵循的版本号（如果比文件头指定的版本号高的话）。如果这个字段缺省或者文件头指定的版本比这里的高，那就以文件头为准。一个PDF生成程序可以通过更新这个字段的值来修改PDF文件版本号。
+Pages	|dictionary|	(必须并且必须为间接对象)当前文档的页面集合入口。
+PageLabels	|number tree|	(可选) number tree，定义了页面和页面label对应关系。
+Names|	dictionary|	(可选)文档的name字典。
+Dests	|dictionary	|(可选;必须是间接对象)name和相应目标对应关系字典。
+ViewerPreferences|	dictionary|	(可选)阅读参数配置字典，定义了文档被打开时候的行为。如果缺省，则使用阅读器自己的配置。
+PageLayout	|name	|(可选) 指定文档被打开的时候页面的布局方式。SinglePageDisplay 单页OneColumnDisplay 单列TwoColumnLeftDisplay 双列，奇数页在左TwoColumnRightDisplay 双列，奇数页在右TwoPageLeft 双页，奇数页在左TwoPageRight 双页，奇数页在右缺省值: SinglePage.
+PageMode	|name|	(可选) 当文档被打开时，指定文档怎么显示UseNone  目录和缩略图都不显示UseOutlines 显示目录UseThumbs  显示缩略图FullScreen  全屏模式，没有菜单，任何其他窗口UseOC     显示Optional content group 面板UseAttachments显示附件面板缺省值: UseNone.
+Outlines	|dictionary|	(可选；必须为间接对象)文档的目录字典
+Threads	|array	|(可选；必须为间接对象)文章线索字典组成的数组。
+OpenAction	|array or dictionary|	(可选) 指定一个区域或一个action，在文档打开的时候显示（区域）或者执行（action）。如果缺省，则会用默认缩放率显示第一页的顶部。
+AA	|dictionary|	(可选)一个附加的动作字典，在全局范围内定义了响应各种事件的action。
+URI|	dictionary	|(可选)一个URI字典包含了文档级别的URI action信息。
+AcroForm|	dictionary	|(可选)文档的交互式form (AcroForm)字典。
+Metadata	|stream	|(可选;必须是间接对象)文档包含的元数据流。
+
+

PhaseAwareNet_SRC/Caffe/AugStegoDataLayer.py

@@ -0,0 +1,183 @@
+# imports
+import json
+import time
+import pickle
+import scipy.misc
+import skimage.io
+import caffe
+
+import numpy as np
+import os.path as osp
+
+from random import shuffle
+#from PIL import Image
+
+import matplotlib.image as mpimg
+
+
+class AugmentDataLayerSync(caffe.Layer):
+
+    """
+    This is a simple syncronous datalayer for inputting the augmented data layer on the fly
+    """
+
+    def setup(self, bottom, top):
+
+        self.top_names = ['data', 'label']
+
+        # === Read input parameters ===
+
+        # params is a python dictionary with layer parameters.
+        params = eval(self.param_str)
+
+        # Check the paramameters for validity.
+        check_params(params)
+
+        # store input as class variables
+        self.batch_size = params['batch_size']
+
+        # Create a batch loader to load the images.
+        self.batch_loader = BatchLoader( params, None )
+
+        # === reshape tops ===
+        # since we use a fixed input image size, we can shape the data layer
+        # once. Else, we'd have to do it in the reshape call.
+        top[0].reshape( self.batch_size, 
+                        1, 
+                        params['im_shape'][0], 
+                        params['im_shape'][1] )
+        
+        # Ground truth
+        top[1].reshape(self.batch_size)
+
+        print_info( "AugmentStegoDataLayerSync", params )
+
+    def forward(self, bottom, top):
+        """
+        Load data.
+        """
+        for itt in range(self.batch_size):
+            # Use the batch loader to load the next image.
+            im, label = self.batch_loader.load_next_image()
+
+            # Add directly to the caffe data layer
+            top[0].data[itt, 0, :, :] = im
+            top[1].data[itt] = label
+
+    def reshape(self, bottom, top):
+        """
+        There is no need to reshape the data, since the input is of fixed size
+        (rows and columns)
+        """
+        pass
+
+    def backward(self, top, propagate_down, bottom):
+        """
+        These layers does not back propagate
+        """
+        pass
+
+
+class BatchLoader(object):
+
+    """
+    This class abstracts away the loading of images.
+    Images can either be loaded singly, or in a batch. The latter is used for
+    the asyncronous data layer to preload batches while other processing is
+    performed.
+    """
+
+    def __init__(self, params, result):
+        
+        self.result = result
+        self.batch_size = params['batch_size']
+        self.root = params['root']
+        self.im_shape = params['im_shape']
+        self.trainMode = ( params['split'] == 'train' )  # determine the mode, if test, no augment        
+         
+        # get list of image indexes.
+        list_file = params['split']  + '.txt'
+        TXT_FILE = osp.join( self.root, list_file )
+        txt_lines = [ line.rstrip('\n') for line in open( TXT_FILE ) ]
+    
+        total_size = len( txt_lines )
+        
+        assert total_size%2 == 0,  "total_size must be even" 
+    
+        self.images = []
+        self.labels = np.zeros( ( total_size, ), dtype = np.int64 )
+        self.indexlist = range( total_size )
+
+        for i in np.arange(total_size):
+            tmp = txt_lines[i].split()
+            self.images.append(tmp[0])
+            self.labels[i] = int(tmp[1])
+                
+        self._cur = 0  # current image
+        self._epoch = 0  # current epoch count, also used as the randomization seed
+        self._flp = 1  # Augment flip number,
+        self._rot = 0  # Augment rotation number
+     
+        print "BatchLoader initialized with {} images".format(len(self.indexlist))
+
+    def load_next_image( self ):
+        
+        """
+        Load the next image in a batch
+        """
+        # Did we finish an epoch
+        if self._cur == len(self.indexlist):
+            self._epoch += 1
+            l = np.random.seed( self._epoch )  #randomize, aslo reproducible
+            l = np.random.permutation( len(self.indexlist)/2 )
+            l2 = np.vstack( ( 2*l, 2*l + 1 )).T
+            self.indexlist = l2.reshape(len(self.indexlist),)
+            self._cur = 0
+            
+        # Index list
+        index = self.indexlist[self._cur]
+        
+        #load an image
+        image_file_name = self.images[index]
+        
+        im = np.asarray( mpimg.imread( image_file_name ))
+    
+        #Determine the new fliplr and rot90 status, used it in the stego            
+        if ( self.trainMode ):
+            if ( self._cur % 2 == 0 ):
+                self._flp = np.random.choice(2)*2 - 1
+                self._rot = np.random.randint(4)
+            im = im[:,::self._flp]
+            im = np.rot90(im, self._rot)
+
+        #load the ground truth
+        label = self.labels[index]
+
+        self._cur += 1
+    
+        return im, label
+       
+
+def check_params(params):
+    """
+    A utility function to check the parameters for the data layers.
+    """
+    assert 'split' in params.keys(
+    ), 'Params must include split (train, val, or test).'
+
+    required = ['batch_size', 'root', 'im_shape']
+    for r in required:
+        assert r in params.keys(), 'Params must include {}'.format(r)
+
+
+def print_info(name, params):
+    """
+    Ouput some info regarding the class
+    """
+    print "{} initialized for split: {}, with bs: {}, im_shape: {}.".format(
+        name,
+        params['split'],
+        params['batch_size'],
+        params['im_shape'])
+    
+    

PhaseAwareNet_SRC/Caffe/HG_IMDB_JUNI04_Create.ipynb

@@ -0,0 +1,122 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false,
+    "deletable": true,
+    "editable": true
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[HG:] Train Set = 30000, Test = 10000\n"
+     ]
+    }
+   ],
+   "source": [
+    "import numpy as np\n",
+    "import os\n",
+    "\n",
+    "import sys\n",
+    "\n",
+    "\n",
+    "N_TRN = 5000\n",
+    "N_TST = 5000\n",
+    "\n",
+    "DataBaseFolder = '/home/mchen/tmp/caffe/data/JStego/'\n",
+    "\n",
+    "BOSS2CoverPath = os.path.join( DataBaseFolder, '75')        # BOSS2 cover subfolder\n",
+    "BOSS2StegoPath = os.path.join( DataBaseFolder, 'JUNI_0.4')  # BOSS2 stego subfolder\n",
+    "\n",
+    "BOW2CoverPath = os.path.join( DataBaseFolder, 'BOWS2_75')          # BOWS cover subfolder\n",
+    "BOW2StegoPath = os.path.join( DataBaseFolder, 'BOWS2_JUNI_0.4')    # BOWS stego subfolder\n",
+    "\n",
+    "TxtListFolder = '/home/mchen/tmp/caffe/data/JStego/MiracleList/'\n",
+    "\n",
+    "np.random.seed(0)   # reset the random seed\n",
+    "\n",
+    "RandomImages = np.random.permutation(10000) + 1\n",
+    "\n",
+    "print (\"[HG:] Train Set = %d, Test = %d\"%( 20000 + N_TRN * 2, N_TST * 2 ) )"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": true,
+    "deletable": true,
+    "editable": true
+   },
+   "outputs": [],
+   "source": [
+    "with open('{}/train.txt'.format(TxtListFolder), 'w') as f:\n",
+    "    for idx in range(N_TRN):\n",
+    "        imageName = str( RandomImages[idx] ) + '.jpg'\n",
+    "        f.write('{} 0\\n'.format(BOSS2CoverPath + '/' + imageName ) )\n",
+    "        f.write('{} 1\\n'.format(BOSS2StegoPath + '/' + imageName ) )\n",
+    "        \n",
+    "    for idx in range(10000):\n",
+    "        imageName = str( RandomImages[idx] ) + '.jpg'\n",
+    "        f.write('{} 0\\n'.format(BOW2CoverPath + '/' + imageName ) )\n",
+    "        f.write('{} 1\\n'.format(BOW2StegoPath + '/' + imageName ) )  \n",
+    "        \n",
+    "    f.close()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": true,
+    "deletable": true,
+    "editable": true
+   },
+   "outputs": [],
+   "source": [
+    "with open('{}/test.txt'.format(TxtListFolder), 'w') as f:\n",
+    "    for idx in range(N_TST):\n",
+    "        imageName = str( RandomImages[N_TRN + idx] ) + '.jpg'\n",
+    "        f.write('{} 0\\n'.format(BOSS2CoverPath + '/' + imageName ) )\n",
+    "        f.write('{} 1\\n'.format(BOSS2StegoPath + '/' + imageName ) )\n",
+    "    f.close()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true,
+    "deletable": true,
+    "editable": true
+   },
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 1
+}

PhaseAwareNet_SRC/Caffe/phase_aware_net_solver.prototxt

@@ -0,0 +1,17 @@
+train_net: "/tmp/tmpNMRrso"
+test_net: "/tmp/tmpwTrC5X"
+test_iter: 1
+test_interval: 1000000
+base_lr: 0.0010000000475
+display: 10
+max_iter: 1000000
+lr_policy: "step"
+gamma: 0.75
+momentum: 0.899999976158
+weight_decay: 0.00999999977648
+stepsize: 6000
+snapshot: 6000
+snapshot_prefix: "/home/mchen/tmp/caffe/examples/PhaseAwareNet"
+solver_mode: GPU
+iter_size: 1
+type: "SGD"

PhaseAwareNet_SRC/Caffe/phase_aware_net_train.prototxt

@@ -0,0 +1,463 @@
+layer {
+  name: "data"
+  type: "Python"
+  top: "data"
+  top: "label"
+  python_param {
+    module: "AugStegoDataLayer"
+    layer: "AugmentDataLayerSync"
+    param_str: "{\'im_shape\': [512, 512], \'root\': \'/home/mchen/tmp/caffe/data/JStego/JUNI_0.4/\', \'split\': \'train\', \'batch_size\': 40}"
+  }
+}
+layer {
+  name: "conv0"
+  type: "Convolution"
+  bottom: "data"
+  top: "conv0"
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  convolution_param {
+    num_output: 4
+    pad: 2
+    kernel_size: 5
+    stride: 1
+    weight_filler {
+      type: "constant"
+      value: 0.0
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "conv1"
+  type: "Convolution"
+  bottom: "conv0"
+  top: "conv1"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  convolution_param {
+    num_output: 8
+    pad: 2
+    kernel_size: 5
+    stride: 1
+    weight_filler {
+      type: "gaussian"
+      std: 0.00999999977648
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "abs1"
+  type: "AbsVal"
+  bottom: "conv1"
+  top: "abs1"
+}
+layer {
+  name: "bn1"
+  type: "BatchNorm"
+  bottom: "abs1"
+  top: "bn1"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  batch_norm_param {
+    moving_average_fraction: 0.980000019073
+    eps: 9.99999974738e-05
+    scale_filler {
+      type: "constant"
+      value: 1.0
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "tanh1"
+  type: "TanH"
+  bottom: "bn1"
+  top: "bn1"
+}
+layer {
+  name: "conv2"
+  type: "Convolution"
+  bottom: "bn1"
+  top: "conv2"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  convolution_param {
+    num_output: 16
+    pad: 2
+    kernel_size: 5
+    stride: 1
+    weight_filler {
+      type: "gaussian"
+      std: 0.00999999977648
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "bn2"
+  type: "BatchNorm"
+  bottom: "conv2"
+  top: "bn2"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  batch_norm_param {
+    moving_average_fraction: 0.980000019073
+    eps: 9.99999974738e-05
+    scale_filler {
+      type: "constant"
+      value: 1.0
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "tanh2"
+  type: "TanH"
+  bottom: "bn2"
+  top: "bn2"
+}
+layer {
+  name: "sbp"
+  type: "SplitByPhase"
+  bottom: "bn2"
+  top: "sbp"
+}
+layer {
+  name: "conv3"
+  type: "Convolution"
+  bottom: "sbp"
+  top: "conv3"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  convolution_param {
+    num_output: 128
+    pad: 0
+    kernel_size: 1
+    stride: 1
+    weight_filler {
+      type: "gaussian"
+      std: 0.00999999977648
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "bn3"
+  type: "BatchNorm"
+  bottom: "conv3"
+  top: "bn3"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  batch_norm_param {
+    moving_average_fraction: 0.980000019073
+    eps: 9.99999974738e-05
+    scale_filler {
+      type: "constant"
+      value: 1.0
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "relu3"
+  type: "ReLU"
+  bottom: "bn3"
+  top: "bn3"
+}
+layer {
+  name: "pool3"
+  type: "Pooling"
+  bottom: "bn3"
+  top: "pool3"
+  pooling_param {
+    pool: AVE
+    kernel_size: 5
+    stride: 2
+    pad: 1
+  }
+}
+layer {
+  name: "conv4"
+  type: "Convolution"
+  bottom: "pool3"
+  top: "conv4"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  convolution_param {
+    num_output: 256
+    pad: 0
+    kernel_size: 1
+    stride: 1
+    weight_filler {
+      type: "gaussian"
+      std: 0.00999999977648
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "bn4"
+  type: "BatchNorm"
+  bottom: "conv4"
+  top: "bn4"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  batch_norm_param {
+    moving_average_fraction: 0.980000019073
+    eps: 9.99999974738e-05
+    scale_filler {
+      type: "constant"
+      value: 1.0
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "relu4"
+  type: "ReLU"
+  bottom: "bn4"
+  top: "bn4"
+}
+layer {
+  name: "pool4"
+  type: "Pooling"
+  bottom: "bn4"
+  top: "pool4"
+  pooling_param {
+    pool: AVE
+    kernel_size: 5
+    stride: 2
+    pad: 1
+  }
+}
+layer {
+  name: "conv5"
+  type: "Convolution"
+  bottom: "pool4"
+  top: "conv5"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  convolution_param {
+    num_output: 512
+    pad: 0
+    kernel_size: 1
+    stride: 1
+    weight_filler {
+      type: "gaussian"
+      std: 0.00999999977648
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "bn5"
+  type: "BatchNorm"
+  bottom: "conv5"
+  top: "bn5"
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 1.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  param {
+    lr_mult: 0.0
+    decay_mult: 0.0
+  }
+  batch_norm_param {
+    moving_average_fraction: 0.980000019073
+    eps: 9.99999974738e-05
+    scale_filler {
+      type: "constant"
+      value: 1.0
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.0
+    }
+  }
+}
+layer {
+  name: "relu5"
+  type: "ReLU"
+  bottom: "bn5"
+  top: "bn5"
+}
+layer {
+  name: "pool5"
+  type: "Pooling"
+  bottom: "bn5"
+  top: "pool5"
+  pooling_param {
+    pool: AVE
+    global_pooling: true
+  }
+}
+layer {
+  name: "fc6"
+  type: "InnerProduct"
+  bottom: "pool5"
+  top: "fc6"
+  param {
+    lr_mult: 1.0
+    decay_mult: 1.0
+  }
+  param {
+    lr_mult: 2.0
+    decay_mult: 0.0
+  }
+  inner_product_param {
+    num_output: 2
+    weight_filler {
+      type: "xavier"
+    }
+    bias_filler {
+      type: "constant"
+      value: 0.00999999977648
+    }
+  }
+}
+layer {
+  name: "loss"
+  type: "SoftmaxWithLoss"
+  bottom: "fc6"
+  bottom: "label"
+  top: "loss"
+}
+layer {
+  name: "acc"
+  type: "Accuracy"
+  bottom: "fc6"
+  bottom: "label"
+  top: "acc"
+}

PhaseAwareNet_SRC/Caffe/split_by_phase_layer.cpp

@@ -0,0 +1,76 @@
+#include <algorithm>
+#include <vector>
+
+#include "caffe/filler.hpp"
+#include "caffe/layer_factory.hpp"
+#include "caffe/layers/split_by_phase_layer.hpp"
+#include "caffe/util/math_functions.hpp"
+
+namespace caffe {
+
+template <typename Dtype>
+void SplitByPhaseLayer<Dtype>::LayerSetUp(const vector<Blob<Dtype>*>& bottom,
+      const vector<Blob<Dtype>*>& top) {
+
+    num_images_ = bottom[0]->num();
+    num_filters_ = bottom[0]->channels();
+    height_ = bottom[0]->height();
+    width_ = bottom[0]->width();
+
+    CHECK_EQ(height_, 512);
+    CHECK_EQ(width_, 512);
+
+}
+
+template <typename Dtype>
+void SplitByPhaseLayer<Dtype>::Reshape(const vector<Blob<Dtype>*>& bottom,
+      const vector<Blob<Dtype>*>& top) {
+
+    top[0]->Reshape(num_images_, num_filters_*64, 64, 64);
+
+}
+
+template <typename Dtype>
+void SplitByPhaseLayer<Dtype>::Forward_cpu(
+    const vector<Blob<Dtype>*>& bottom, const vector<Blob<Dtype>*>& top) {
+  const Dtype* bottom_data = bottom[0]->cpu_data();
+  Dtype* top_data = top[0]->mutable_cpu_data();
+  int n, c, p, h, w, source_index;
+  for (int index = 0; index < bottom[0]->count(); ++index) {
+      w = index % 64;
+      h = (index / 64) % 64;
+      p = (index / 64 / 64) % 64;
+      c = (index / 64 / 64 / 64) % num_filters_;
+      n = index / 64 / 64 / 64 / num_filters_;
+      source_index = ((w*8)+(h*8*512)+(p%8)+(p/8)*512)+((n*num_filters_+c)*512*512);
+      top_data[index] = bottom_data[source_index];
+  }
+}
+
+template <typename Dtype>
+void SplitByPhaseLayer<Dtype>::Backward_cpu(const vector<Blob<Dtype>*>& top,
+    const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom) {
+    if (propagate_down[0]) {
+        const Dtype* top_diff = top[0]->cpu_diff();
+        Dtype* bottom_diff = bottom[0]->mutable_cpu_diff();
+        int n, c, p, h, w, source_index;
+        for (int index = 0; index < bottom[0]->count(); ++index) {
+            w = index % 64;
+            h = (index / 64) % 64;
+            p = (index / 64 / 64) % 64;
+            c = (index / 64 / 64 / 64) % num_filters_;
+            n = index / 64 / 64 / 64 / num_filters_;
+            source_index = ((w*8)+(h*8*512)+(p%8)+(p/8)*512)+((n*num_filters_+c)*512*512);
+            bottom_diff[source_index] = top_diff[index];
+        }
+    }
+}
+
+#ifdef CPU_ONLY
+STUB_GPU(SplitByPhaseLayer);
+#endif
+
+INSTANTIATE_CLASS(SplitByPhaseLayer);
+REGISTER_LAYER_CLASS(SplitByPhase);
+
+}  // namespace caffe

PhaseAwareNet_SRC/Caffe/split_by_phase_layer.cu

@@ -0,0 +1,92 @@
+#include <cfloat>
+#include <vector>
+
+#include "caffe/layers/split_by_phase_layer.hpp"
+#include "caffe/util/math_functions.hpp"
+
+namespace caffe {
+
+template <typename Dtype>
+__global__ void SplitByPhaseForward(const int nthreads,
+    const Dtype* const bottom_data, const int num_filters, Dtype* const top_data) {
+    CUDA_KERNEL_LOOP(index, nthreads) {
+        const int w = index % 64;
+        const int h = (index / 64) % 64;
+        const int p = (index / 64 / 64) % 64;
+        const int c = (index / 64 / 64 / 64) % num_filters;
+        const int n = index / 64 / 64 / 64 / num_filters;
+        const int  source_index = ((w*8)+(h*8*512)+(p%8)+(p/8)*512)+((n*num_filters+c)*512*512);
+        top_data[index] = bottom_data[source_index];;
+    }
+}
+
+template <typename Dtype>
+__global__ void SplitByPhaseForwardSlow(const int nthreads,
+    const Dtype* const bottom_data, const int num_filters, Dtype* const top_data) {
+    CUDA_KERNEL_LOOP(index, nthreads) {
+        int h, p, c, n, source_index;
+        for (int w = 0; w < 64; ++w) {
+            h = index % 64;
+            p = (index / 64) % 64;
+            c = (index / 64 / 64) % num_filters;
+            n = index / 64 / 64 / num_filters;
+            source_index = ((w*8)+(h*8*512)+(p%8)+(p/8)*512)+((n*num_filters+c)*512*512);
+            top_data[index*64+w] = bottom_data[source_index];
+        }
+    }
+}
+
+template <typename Dtype>
+void SplitByPhaseLayer<Dtype>::Forward_gpu(
+    const vector<Blob<Dtype>*>& bottom, const vector<Blob<Dtype>*>& top) {
+    const Dtype* bottom_data = bottom[0]->gpu_data();
+    Dtype* top_data = top[0]->mutable_gpu_data();
+    const int count = top[0]->count();
+    // NOLINT_NEXT_LINE(whitespace/operators)
+    SplitByPhaseForward<Dtype><<<CAFFE_GET_BLOCKS(count), CAFFE_CUDA_NUM_THREADS>>>(
+        count, bottom_data, num_filters_, top_data);
+}
+
+template <typename Dtype>
+__global__ void SplitByPhaseBackwardSlow(const int nthreads,
+    Dtype* const bottom_diff, const int num_filters, const Dtype* const top_diff) {
+    CUDA_KERNEL_LOOP(index, nthreads) {
+        const int w = index % 64;
+        const int h = (index / 64) % 64;
+        const int p = (index / 64 / 64) % 64;
+        const int c = (index / 64 / 64 / 64) % num_filters;
+        const int n = index / 64 / 64 / 64 / num_filters;
+        const int  source_index = ((w*8)+(h*8*512)+(p%8)+(p/8)*512)+((n*num_filters+c)*512*512);
+        bottom_diff[source_index] = top_diff[index];
+    }
+}
+
+template <typename Dtype>
+__global__ void SplitByPhaseBackward(const int nthreads,
+    Dtype* const bottom_diff, const int num_filters, const Dtype* const top_diff) {
+    CUDA_KERNEL_LOOP(index, nthreads) {
+        const int w = index % 512;
+        const int h = (index / 512) % 512;
+        const int c = (index / 512 / 512) % num_filters;
+        const int n = index / 512 / 512 / num_filters;
+        const int  target_index = ((w/8)+64*(h/8))+(64*64*(((w%8)+8*(h%8))))+(512*512*(n*num_filters+c));
+        bottom_diff[index] = top_diff[target_index];
+    }
+}
+
+template <typename Dtype>
+void SplitByPhaseLayer<Dtype>::Backward_gpu(const vector<Blob<Dtype>*>& top,
+    const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom) {
+    if (propagate_down[0]) {
+        const Dtype* top_diff = top[0]->gpu_diff();
+        Dtype* bottom_diff = bottom[0]->mutable_gpu_diff();
+        const int count = bottom[0]->count();
+        // NOLINT_NEXT_LINE(whitespace/operators)
+        SplitByPhaseBackward<Dtype><<<CAFFE_GET_BLOCKS(count), CAFFE_CUDA_NUM_THREADS>>>(
+            count, bottom_diff, num_filters_, top_diff);
+    }
+}
+
+INSTANTIATE_LAYER_GPU_FUNCS(SplitByPhaseLayer);
+
+}  // namespace caffe

PhaseAwareNet_SRC/Caffe/split_by_phase_layer.hpp

@@ -0,0 +1,57 @@
+#ifndef CAFFE_SPLIT_BY_PHASE_LAYER_HPP_
+#define CAFFE_SPLIT_BY_PHASE_LAYER_HPP_
+
+#include <vector>
+
+#include "caffe/blob.hpp"
+#include "caffe/layer.hpp"
+#include "caffe/proto/caffe.pb.h"
+
+namespace caffe {
+
+template <typename Dtype>
+class SplitByPhaseLayer: public Layer<Dtype> {
+ public:
+  explicit SplitByPhaseLayer(const LayerParameter& param)
+      : Layer<Dtype>(param) {}
+  virtual void LayerSetUp(const vector<Blob<Dtype>*>& bottom,
+      const vector<Blob<Dtype>*>& top);
+  virtual void Reshape(const vector<Blob<Dtype>*>& bottom,
+      const vector<Blob<Dtype>*>& top);
+
+  virtual inline const char* type() const { return "SplitByPhase"; }
+    virtual inline int ExactNumBottomBlobs() const { return 1; }
+    virtual inline int ExactNumTopBlobs() const { return 1; }
+
+ protected:
+  virtual void Forward_cpu(const vector<Blob<Dtype>*>& bottom,
+      const vector<Blob<Dtype>*>& top);
+  virtual void Forward_gpu(const vector<Blob<Dtype>*>& bottom,
+      const vector<Blob<Dtype>*>& top);
+  virtual void Backward_cpu(const vector<Blob<Dtype>*>& top,
+      const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom);
+  virtual void Backward_gpu(const vector<Blob<Dtype>*>& top,
+      const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom);
+
+  shared_ptr<Layer<Dtype> > bias_layer_;
+  vector<Blob<Dtype>*> bias_bottom_vec_;
+  vector<bool> bias_propagate_down_;
+  int bias_param_id_;
+
+  Blob<Dtype> sum_multiplier_;
+  Blob<Dtype> sum_result_;
+  Blob<Dtype> temp_;
+  int axis_;
+  int outer_dim_, scale_dim_, inner_dim_;
+
+  int num_images_;
+  int num_filters_;
+  int height_;
+  int width_;
+
+};
+
+
+}  // namespace caffe
+
+#endif  // CAFFE_SPLIT_BY_PHASE_LAYER_HPP_

PhaseAwareNet_SRC/Caffe/test_split_by_phase_layer.cpp

@@ -0,0 +1,123 @@
+#include <vector>
+
+#include "gtest/gtest.h"
+
+#include "caffe/blob.hpp"
+#include "caffe/common.hpp"
+#include "caffe/filler.hpp"
+#include "caffe/layers/split_by_phase_layer.hpp"
+
+#include "caffe/test/test_caffe_main.hpp"
+#include "caffe/test/test_gradient_check_util.hpp"
+
+namespace caffe {
+
+#ifndef CPU_ONLY
+extern cudaDeviceProp CAFFE_TEST_CUDA_PROP;
+#endif
+
+template <typename TypeParam>
+class SplitByPhaseLayerTest : public MultiDeviceTest<TypeParam> {
+  typedef typename TypeParam::Dtype Dtype;
+ protected:
+  SplitByPhaseLayerTest()
+      : blob_bottom_(new Blob<Dtype>(1, 1, 512, 512)),
+        blob_bottom_nobatch_(new Blob<Dtype>(1, 2, 3, 4)),
+        blob_top_(new Blob<Dtype>()) {
+    // fill the values
+    FillerParameter filler_param;
+//    filler_param.s
+    filler_param.set_min(-9);
+    filler_param.set_max(9);
+    UniformFiller<Dtype> filler(filler_param);
+    filler.Fill(this->blob_bottom_);
+    blob_top_vec_.push_back(blob_top_);
+  }
+  virtual ~SplitByPhaseLayerTest() {
+    delete blob_bottom_;
+    delete blob_bottom_nobatch_;
+    delete blob_top_;
+  }
+  Blob<Dtype>* const blob_bottom_;
+  Blob<Dtype>* const blob_bottom_nobatch_;
+  Blob<Dtype>* const blob_top_;
+  vector<Blob<Dtype>*> blob_bottom_vec_;
+  vector<Blob<Dtype>*> blob_top_vec_;
+};
+
+TYPED_TEST_CASE(SplitByPhaseLayerTest, TestDtypesAndDevices);
+
+TYPED_TEST(SplitByPhaseLayerTest, TestSetUp) {
+  typedef typename TypeParam::Dtype Dtype;
+  this->blob_bottom_vec_.push_back(this->blob_bottom_);
+  LayerParameter layer_param;
+  shared_ptr<SplitByPhaseLayer<Dtype> > layer(
+      new SplitByPhaseLayer<Dtype>(layer_param));
+  layer->SetUp(this->blob_bottom_vec_, this->blob_top_vec_);
+  EXPECT_EQ(this->blob_top_vec_[0]->num(), 1);
+  EXPECT_EQ(this->blob_top_vec_[0]->channels(), 1*64);
+  EXPECT_EQ(this->blob_top_vec_[0]->height(), 64);
+  EXPECT_EQ(this->blob_top_vec_[0]->width(), 64);
+}
+
+TYPED_TEST(SplitByPhaseLayerTest, TestForward) {
+  typedef typename TypeParam::Dtype Dtype;
+  Dtype* bottom_data = this->blob_bottom_->mutable_cpu_data();
+  const int num_filters = this->blob_bottom_->channels();
+  int n, c, p, h, w, bottom_fill_idx;
+  for (int index = 0; index < this->blob_bottom_->count(); ++index) {
+      w = index % 64;
+      h = (index / 64) % 64;
+      p = (index / 64 / 64) % 64;
+      c = (index / 64 / 64 / 64) % num_filters;
+      n = index / 64 / 64 / 64 / num_filters;
+      bottom_fill_idx = ((w*8)+(h*8*512)+(p%8)+(p/8)*512)+((n*num_filters+c)*512*512);
+      bottom_data[bottom_fill_idx] = p;
+  }
+  this->blob_bottom_vec_.push_back(this->blob_bottom_);
+  bool IS_VALID_CUDA = false;
+#ifndef CPU_ONLY
+  IS_VALID_CUDA = CAFFE_TEST_CUDA_PROP.major >= 2;
+#endif
+  if (Caffe::mode() == Caffe::CPU ||
+      sizeof(Dtype) == 4 || IS_VALID_CUDA) {
+    LayerParameter layer_param;
+    shared_ptr<SplitByPhaseLayer<Dtype> > layer(
+        new SplitByPhaseLayer<Dtype>(layer_param));
+    layer->SetUp(this->blob_bottom_vec_, this->blob_top_vec_);
+    layer->Forward(this->blob_bottom_vec_, this->blob_top_vec_);
+    const Dtype* data = this->blob_top_vec_[0]->cpu_data();
+    const int num_phase_blocks = this->blob_top_vec_[0]->num()*this->blob_top_vec_[0]->channels();
+    for (int nc = 0; nc < num_phase_blocks; ++nc) {
+        for (int h = 0; h < 64 ; ++h ) {
+            for (int w = 0; w < 64 ; ++w ) {
+                CHECK_EQ(data[nc*(64*64)+h*64+w], nc%64);
+            }
+        }
+    }
+  } else {
+         LOG(ERROR) << "Skipping test due to old architecture.";
+  }
+}
+
+TYPED_TEST(SplitByPhaseLayerTest, TestGradient) {
+  typedef typename TypeParam::Dtype Dtype;
+  this->blob_bottom_vec_.push_back(this->blob_bottom_);
+  bool IS_VALID_CUDA = false;
+#ifndef CPU_ONLY
+  IS_VALID_CUDA = CAFFE_TEST_CUDA_PROP.major >= 2;
+#endif
+//  if (Caffe::mode() == Caffe::CPU ||
+//      sizeof(Dtype) == 4 || IS_VALID_CUDA) {
+  if (Caffe::mode() == Caffe::GPU) {
+    LayerParameter layer_param;
+    SplitByPhaseLayer<Dtype> layer(layer_param);
+    GradientChecker<Dtype> checker(1e-2, 1e-3);
+    checker.CheckGradientExhaustive(&layer, this->blob_bottom_vec_,
+        this->blob_top_vec_);
+  } else {
+    LOG(ERROR) << "Skipping test due to old architecture.";
+  }
+}
+
+}  // namespace caffe

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/examples/PhaseAwareNet/bn_refine_phaseaware.m

@@ -0,0 +1,70 @@
+function [BN_Moments, stats] = bn_refine_phaseaware(varargin)
+% Test the phasesplit net
+
+opts.batchSize = 48;
+opts.expDir = fullfile('data', 'JUNI-7504-PNet-dagnn-40-Seed-0-log_short') ;
+opts.testEpoch = 40;
+opts.saveResult = true;
+opts.bnEpochCollectSize = 2000;
+opts.gpuIdx = 1;
+
+opts = vl_argparse( opts, varargin );
+
+opts.imdbPath = fullfile(opts.expDir, 'imdb.mat');
+
+opts.train = struct('gpus', opts.gpuIdx, 'cudnn', true, 'stegoShuffle', true ) ; 
+if ~isfield(opts.train, 'gpus'), opts.train.gpus = []; end;
+
+% put it to drawing
+if ( ~exist( opts.expDir, 'dir' ) )
+    error('expDir is empty' ); 
+end
+
+% -------------------------------------------------------------------------
+%                                                         Find the data base
+% -------------------------------------------------------------------------
+if exist(opts.imdbPath, 'file')
+  imdb = load(opts.imdbPath) ;
+else
+  error(' cannot find imdb' );
+end
+
+
+meta.inputSize = [512, 512, 1, opts.batchSize];
+
+[BN_Moments, stats] = cnn_bnrefine_dag(imdb, getBatchFn( opts, meta ), ...
+                      'expDir', opts.expDir, ...
+                      'batchSize', opts.batchSize, ...
+                      'testEpoch', opts.testEpoch, ...
+                      'bnEpochCollectSize', opts.bnEpochCollectSize, ... 
+                      'saveResult', opts.saveResult, ...
+                      opts.train ) ;
+
+                    
+% -------------------------------------------------------------------------
+function fn = getBatchFn(opts, meta)
+% -------------------------------------------------------------------------
+bopts.useGpu = numel(opts.train.gpus) > 0 ;
+bopts.imageSize = meta.inputSize;
+    
+fn = @(x,y) getDagNNBatch(bopts,x,y) ;
+        
+% -------------------------------------------------------------------------
+function inputs = getDagNNBatch(opts, imdb, batch)
+% -------------------------------------------------------------------------
+% label
+labels = imdb.images.label(1,batch) ;
+% images
+images = zeros(opts.imageSize(1), opts.imageSize(2), ...
+               opts.imageSize(3), numel(batch), 'single') ;
+for i = 1:numel(batch)
+  imt = load(imdb.images.name{batch(i)}, 'im');
+  images(:,:,:,i) = single(imt.im);
+%   imt = imread(imdb.images.name{batch(i)});
+%   images(:,:,:,i) = single(imt);
+end
+
+if opts.useGpu > 0
+  images = gpuArray(images) ;
+end
+inputs = {'input', images, 'label', labels} ;

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/examples/PhaseAwareNet/cnn_phaseaware.m

@@ -0,0 +1,149 @@
+function [net, info] = cnn_phaseaware(varargin)
+%CNN_PHASEAWARE   Demonstrates training a PhaseAwareNet on JUNI and UED
+
+run(fullfile(fileparts(mfilename('fullpath')), ...
+  '..', '..', 'matlab', 'vl_setupnn.m')) ;
+
+opts.modelType = 'PNet'; 
+opts.seed = 0;   
+opts.networkType = 'dagnn' ;
+opts.batchSize = 40;
+opts.lrSequence = 'log_short';
+opts.printDotFile = true;
+opts.coverPath = 'C:\DeepLearning\matconvnet-1.0-beta20\data\JStego\75_mat';
+opts.stegoPath = 'C:\DeepLearning\matconvnet-1.0-beta20\data\JStego\JUNI_0.4_mat';
+
+
+sfx = [opts.modelType, '-', opts.networkType, '-', num2str(opts.batchSize), ...
+                  '-Seed-', num2str(opts.seed), '-', opts.lrSequence] ;   
+opts.expDir = fullfile('data', ['JUNI-7504-' sfx]) ; % TODO
+
+opts.imdbPath = fullfile(opts.expDir, 'imdb.mat');
+
+opts.train = struct('gpus', [1,2], 'cudnn', true, 'stegoShuffle', true, 'computeBNMoment', true) ; 
+if ~isfield(opts.train, 'gpus'), opts.train.gpus = []; end;
+
+
+% -------------------------------------------------------------------------
+%                                                             Prepare model
+% -------------------------------------------------------------------------
+if (strcmpi( opts.modelType, 'PNet' ))                   
+  
+  net = cnn_phaseaware_PNet_init( 'networkType', opts.networkType, ...
+                                 'batchSize', opts.batchSize, ...
+                                 'seed', opts.seed, ...
+                                 'lrSequence', opts.lrSequence ); 
+
+elseif (strcmpi( opts.modelType, 'VNet' ))
+  
+  net = cnn_phaseaware_VNet_init( 'networkType', opts.networkType, ...
+                                   'batchSize', opts.batchSize, ... 
+                                   'seed', opts.seed, ...
+                                   'lrSequence', opts.lrSequence ); 
+
+else
+  error('Unknown model type');
+end
+
+% put it to drawing
+if ( ~exist( opts.expDir, 'dir' ) )
+    mkdir( opts.expDir );  
+end
+
+if opts.printDotFile 
+  net2dot(net,  fullfile( opts.expDir, 'NetConfig.dot' ), ...
+          'BatchSize', net.meta.trainOpts.batchSize, ...
+          'Inputs', {'input', [net.meta.inputSize, net.meta.trainOpts.batchSize]});
+end
+
+% -------------------------------------------------------------------------
+%                                                              Prepare data
+% -------------------------------------------------------------------------
+if exist(opts.imdbPath, 'file')
+  imdb = load(opts.imdbPath) ;
+else
+  imdb = cnn_phaseaware_imdb_setup('coverPath', opts.coverPath, 'stegoPath', opts.stegoPath) ;
+
+  save(opts.imdbPath, '-struct', 'imdb') ;
+end
+
+% Set the class names in the network
+net.meta.classes.name = imdb.classes.name ;
+net.meta.classes.description = imdb.classes.description ;
+
+
+% -------------------------------------------------------------------------
+%                                                                     Learn
+% -------------------------------------------------------------------------
+switch opts.networkType
+  case 'dagnn', trainFn = @cnn_train_dag ;
+  otherwise, error('wrong network type');
+end
+
+[net, info] = trainFn(net, imdb, getBatchFn(opts, net.meta), ...
+                      'expDir', opts.expDir, ...
+                      net.meta.trainOpts, ...
+                      opts.train) ;
+
+modelPath = fullfile(opts.expDir, 'net-deployed.mat');
+
+switch opts.networkType
+  case 'dagnn'
+    net_ = net.saveobj() ;
+    save(modelPath, '-struct', 'net_') ;
+    clear net_ ;
+end
+                    
+% -------------------------------------------------------------------------
+function fn = getBatchFn(opts, meta)
+% -------------------------------------------------------------------------
+bopts.useGpu = numel(opts.train.gpus) > 0 ;
+bopts.imageSize = meta.inputSize;
+
+switch lower(opts.networkType)
+  case 'dagnn'
+    fn = @(x,y) getDagNNBatch(bopts,x,y) ;
+end
+            
+% -------------------------------------------------------------------------
+function inputs = getDagNNBatch(opts, imdb, batch)
+% -------------------------------------------------------------------------
+% label
+labels = imdb.images.label(1,batch) ;
+% images
+images = zeros(opts.imageSize(1), opts.imageSize(2), ...
+               opts.imageSize(3), numel(batch), 'single') ;
+             
+for i = 1:numel(batch)/2
+  
+%   cover = imread(imdb.images.name{batch(2*i-1)});
+%   stego = imread(imdb.images.name{batch(2*i)});
+
+  imt = load(imdb.images.name{batch(2*i-1)}, 'im');
+  cover = single(imt.im);
+    
+  imt = load(imdb.images.name{batch(2*i)}, 'im');
+  stego = single(imt.im);
+  
+  % random rotate, 0, 90, 180, 270  
+  r = randi(4) - 1;  
+  cover = rot90( cover, r );
+  stego = rot90( stego, r );
+  
+  % random mirror flip  
+  if ( rand > 0.5 )    
+    cover = fliplr( cover );
+    stego = fliplr( stego );
+  end
+  
+  images(:,:,:,2*i-1) = single(cover);
+  images(:,:,:,2*i) = single(stego);
+   
+end
+
+if opts.useGpu > 0
+  images = gpuArray(images) ;
+end
+inputs = {'input', images, 'label', labels} ;
+
+

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/examples/PhaseAwareNet/cnn_phaseaware_PNet_init.m

@@ -0,0 +1,265 @@
+function net = cnn_phaseaware_PNet_init(varargin)
+% Define and initialize PhaseAwareNet net
+opts.networkType = 'dagnn' ;
+opts.batchSize = 40;
+opts.seed = 0;
+opts.lrSequence = 'step_long2';
+opts = vl_argparse(opts, varargin) ;
+
+rng( opts.seed );
+
+net.layers = {} ;
+
+convOpts = {'CudnnWorkspaceLimit', 1024*1024*1204} ;
+
+HPF = zeros(5, 5, 1, 4, 'single');
+
+HPF(:,:,1,1) = [ -1,  2,  -2,  2, -1; ...
+                  2, -6,   8, -6,  2; ...
+                 -2,  8, -12,  8, -2; ...
+                  2, -6,   8, -6,  2; ...
+                 -1,  2,  -2,  2, -1]/12;
+
+HPF(:,:,1,2) = [  0,    0,    5.2,    0,   0; ...
+                  0, 23.4,   36.4, 23.4,   0; ...
+                5.2, 36.4, -261.0, 36.4, 5.2; ...
+                  0, 23.4,   36.4, 23.4,   0; ...
+                  0,    0,    5.2,    0,   0]/261;
+                   
+HPF(:,:,1,3) = [ 0.0562, -0.1354,  0.0000,  0.1354, -0.0562; ...
+                 0.0818, -0.1970,  0.0000,  0.1970, -0.0818; ...
+                 0.0926, -0.2233,  0.0000,  0.2233, -0.0926; ...
+                 0.0818, -0.1970,  0.0000,  0.1970, -0.0818; ...
+                 0.0562, -0.1354,  0.0000,  0.1354, -0.0562 ];
+
+HPF(:,:,1,4) = [-0.0562, -0.0818, -0.0926, -0.0818, -0.0562; ...
+                 0.1354,  0.1970,  0.2233,  0.1970,  0.1354; ...
+                 0.0000,  0.0000,  0.0000, -0.0000, -0.0000; ...
+                -0.1354, -0.1970, -0.2233, -0.1970, -0.1354; ...
+                 0.0562,  0.0818,  0.0926,  0.0818,  0.0562 ];
+
+
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'HPFs', ...
+                           'weights', {{HPF, []}}, ...
+                           'learningRate', [0, 0], ...
+                           'stride', 1, ...
+                           'pad', 2, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+
+% Group 1
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_1', ...
+                           'weights', {{init_weight('gaussian', 5, 5, 4, 8, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 2, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'abs', 'name', 'ABS_1') ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_1', ...
+                           'weights', {{ones(8, 1, 'single'), ...
+                                        zeros(8, 1, 'single'), ...
+                                        zeros(8, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'tanh', 'name', 'TanH_1') ;
+
+                           
+% Group 2
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_2', ...
+                           'weights', {{init_weight('gaussian', 5, 5, 8, 16, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 2, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_2', ...
+                           'weights', {{ones(16, 1, 'single'), ...
+                                        zeros(16, 1, 'single'), ...
+                                        zeros(16, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'tanh', 'name', 'TanH_2') ;
+
+
+% Phase split here
+net.layers{end+1} = struct('type', 'phasesplit', ...
+                           'name', 'DCTPhaseSplit', ...
+                           'pool', [1, 1], ...
+                           'stride', 8, ...
+                           'pad', 0 );
+
+DCTMode = 64;
+% Group 3
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_3', ...
+                           'weights', {{init_weight('gaussian', 1, 1, 16, 32*DCTMode, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 0, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_3', ...
+                           'weights', {{ones(32*DCTMode, 1, 'single'), ...
+                                        zeros(32*DCTMode, 1, 'single'), ...
+                                        zeros(32*DCTMode, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'relu', 'name', 'ReLU_3') ;
+net.layers{end+1} = struct('type', 'pool', ...
+                           'name', 'Pool_3', ...
+                           'method', 'avg', ...
+                           'pool', [5 5], ...
+                           'stride', 2, ...
+                           'pad', 2) ;
+                         
+% Group 4
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_4', ...
+                           'weights', {{init_weight('gaussian', 1, 1, 32, 64*DCTMode, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 0, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_4', ...
+                           'weights', {{ones(64*DCTMode, 1, 'single'), ...
+                                        zeros(64*DCTMode, 1, 'single'), ...
+                                        zeros(64*DCTMode, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'relu', 'name', 'ReLU_4') ;
+net.layers{end+1} = struct('type', 'pool', ...
+                           'name', 'Pool_4', ...
+                           'method', 'avg', ...
+                           'pool', [5 5], ...
+                           'stride', 2, ...
+                           'pad', 2) ;
+                         
+% Group 5
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_5', ...
+                           'weights', {{init_weight('gaussian', 1, 1, 64, 128*DCTMode, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 0, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_5', ...
+                           'weights', {{ones(128*DCTMode, 1, 'single'), ...
+                                        zeros(128*DCTMode, 1, 'single'), ...
+                                        zeros(128*DCTMode, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'relu', 'name', 'ReLU_5') ;
+net.layers{end+1} = struct('type', 'pool', ...
+                           'name', 'Pool_5', ...
+                           'method', 'avg', ...
+                           'pool', [16 16], ...
+                           'stride', 1, ...
+                           'pad', 0) ;
+
+% Full connect layer
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'FC',...
+                           'weights', {{init_weight('xavier', 1,1,128*DCTMode,2, 'single'), ...
+                                        0.01*ones(2, 1, 'single')}}, ...
+                           'learningRate', [1 2], ...
+                           'weightDecay', [1 0], ...
+                           'stride', 1, ...
+                           'pad', 0) ;
+
+% Softmax layer
+net.layers{end+1} = struct('type', 'softmaxloss', 'name', 'loss') ;
+
+% Meta parameters
+net.meta.inputSize = [512 512 1] ;
+
+lr = get_lr_sequence(opts.lrSequence);
+net.meta.trainOpts.learningRate = lr;
+net.meta.trainOpts.numEpochs = numel(lr) ;
+net.meta.trainOpts.batchSize = opts.batchSize ;
+net.meta.trainOpts.weightDecay = 0.01; 
+                                        
+
+% Fill in default values
+net = vl_simplenn_tidy(net) ;
+
+% Switch to DagNN if requested
+switch lower(opts.networkType)
+  case 'simplenn'
+    % done
+  case 'dagnn'
+    net = dagnn.DagNN.fromSimpleNN(net, 'canonicalNames', true) ;
+    net.addLayer('error', dagnn.Loss('loss', 'classerror'), ...
+                 {'prediction','label'}, 'error') ;
+  otherwise
+    assert(false) ;
+end                          
+
+% -------------------------------------------------------------------------
+function weights = init_weight(weightInitMethod, h, w, in, out, type)
+% -------------------------------------------------------------------------
+% See K. He, X. Zhang, S. Ren, and J. Sun. Delving deep into
+% rectifiers: Surpassing human-level performance on imagenet
+% classification. CoRR, (arXiv:1502.01852v1), 2015.
+switch lower(weightInitMethod)
+  case 'gaussian'
+    sc = 0.01 ;
+    weights = randn(h, w, in, out, type)*sc;
+  case 'xavier'
+    sc = sqrt(3/(h*w*in)) ;
+    weights = (rand(h, w, in, out, type)*2 - 1)*sc ;
+ case 'xavierimproved'
+    sc = sqrt(2/(h*w*out)) ;
+    weights = randn(h, w, in, out, type)*sc ;    
+  otherwise
+    error('Unknown weight initialization method''%s''', weightInitMethod);
+end
+
+function lr = get_lr_sequence( lrGenerationMethod )
+
+switch lower(lrGenerationMethod)
+  case 'step_short'    
+    lr = 0.001 * ones(1, 2);
+    for i = 1:39
+       lr =[lr, lr(end-1:end)*0.9];
+    end
+  case 'log_short'
+    %lr = logspace(-3, -5, 80);
+    lr = logspace(-3, -5, 40 );
+  case 'step_long'
+    numInterationPerEpoch = 8000/64;
+    lrStepSize = 5000/numInterationPerEpoch; % 
+    totalStep = 220000/5000;  % CNN is trained for 120,000 iterations
+    lr = 0.001*ones(1,lrStepSize);
+    for i = 1:totalStep - 1
+      lr = [lr, lr(end-lrStepSize+1:end) *0.9];
+    end
+  case 'step_long2'
+    numInterationPerEpoch = 8000/64;
+    lrStepSize = 2500/numInterationPerEpoch; % 
+    totalStep = 12;
+    lr = 0.001*ones(1,lrStepSize);
+    for i = 1:totalStep - 1
+      lr = [lr, lr(end-lrStepSize+1:end) *0.75];
+    end  
+  case 'step_long3'
+    numInterationPerEpoch = 8000/64;
+    lrStepSize = 2500/numInterationPerEpoch/2; % 
+    totalStep = 10;
+    lr = 0.001*ones(1,lrStepSize);
+    for i = 1:totalStep - 1
+      lr = [lr, lr(end-lrStepSize+1:end) *0.5];
+    end    
+  otherwise
+    error('unkown type of lr sequence generation method''%s''', lrGenerationMethod);
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/examples/PhaseAwareNet/cnn_phaseaware_VNet_init.m

@@ -0,0 +1,264 @@
+function net = cnn_phaseaware_VNet_init(varargin)
+% Define and initialize PhaseAwareNet net
+opts.networkType = 'dagnn' ;
+opts.batchSize = 40;
+opts.seed = 0;
+opts.lrSequence = 'step_long2';
+opts = vl_argparse(opts, varargin) ;
+
+rng( opts.seed );
+
+net.layers = {} ;
+
+convOpts = {'CudnnWorkspaceLimit', 1024*1024*1204} ;
+
+HPF = zeros(5, 5, 1, 4, 'single');
+HPF(:,:,1,1) = [ -1,  2,  -2,  2, -1; ...
+                  2, -6,   8, -6,  2; ...
+                 -2,  8, -12,  8, -2; ...
+                  2, -6,   8, -6,  2; ...
+                 -1,  2,  -2,  2, -1]/12;
+
+HPF(:,:,1,2) = [  0,    0,    5.2,    0,   0; ...
+                  0, 23.4,   36.4, 23.4,   0; ...
+                5.2, 36.4, -261.0, 36.4, 5.2; ...
+                  0, 23.4,   36.4, 23.4,   0; ...
+                  0,    0,    5.2,    0,   0]/261;
+                   
+HPF(:,:,1,3) = [ 0.0562, -0.1354,  0.0000,  0.1354, -0.0562; ...
+                 0.0818, -0.1970,  0.0000,  0.1970, -0.0818; ...
+                 0.0926, -0.2233,  0.0000,  0.2233, -0.0926; ...
+                 0.0818, -0.1970,  0.0000,  0.1970, -0.0818; ...
+                 0.0562, -0.1354,  0.0000,  0.1354, -0.0562 ];
+
+HPF(:,:,1,4) = [-0.0562, -0.0818, -0.0926, -0.0818, -0.0562; ...
+                 0.1354,  0.1970,  0.2233,  0.1970,  0.1354; ...
+                 0.0000,  0.0000,  0.0000, -0.0000, -0.0000; ...
+                -0.1354, -0.1970, -0.2233, -0.1970, -0.1354; ...
+                 0.0562,  0.0818,  0.0926,  0.0818,  0.0562 ];
+
+
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'HPFs', ...
+                           'weights', {{HPF, []}}, ...
+                           'learningRate', [0, 0], ...
+                           'stride', 1, ...
+                           'pad', 2, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+
+% Group 1
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_1', ...
+                           'weights', {{init_weight('gaussian', 5, 5, 4, 8, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 2, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'abs', 'name', 'ABS_1') ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_1', ...
+                           'weights', {{ones(8, 1, 'single'), ...
+                                        zeros(8, 1, 'single'), ...
+                                        zeros(8, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'tanh', 'name', 'TanH_1') ;
+
+                           
+% Group 2
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_2', ...
+                           'weights', {{init_weight('gaussian', 5, 5, 8, 16, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 2, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_2', ...
+                           'weights', {{ones(16, 1, 'single'), ...
+                                        zeros(16, 1, 'single'), ...
+                                        zeros(16, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'tanh', 'name', 'TanH_2') ;
+
+
+% Phase split here
+net.layers{end+1} = struct('type', 'phasesplit', ...
+                           'name', 'DCTPhaseSplit', ...
+                           'pool', [1, 1], ...
+                           'stride', 8, ...
+                           'pad', 0 );
+
+DCTMode = 64;
+% Group 3
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_3', ...
+                           'weights', {{init_weight('gaussian', 1, 1, 16*DCTMode, 128, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 0, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_3', ...
+                           'weights', {{ones(128, 1, 'single'), ...
+                                        zeros(128, 1, 'single'), ...
+                                        zeros(128, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'relu', 'name', 'ReLU_3') ;
+net.layers{end+1} = struct('type', 'pool', ...
+                           'name', 'Pool_3', ...
+                           'method', 'avg', ...
+                           'pool', [5 5], ...
+                           'stride', 2, ...
+                           'pad', 2) ;
+                         
+% Group 4
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_4', ...
+                           'weights', {{init_weight('gaussian', 1, 1, 128, 256, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 0, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_4', ...
+                           'weights', {{ones(256, 1, 'single'), ...
+                                        zeros(256, 1, 'single'), ...
+                                        zeros(256, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'relu', 'name', 'ReLU_4') ;
+net.layers{end+1} = struct('type', 'pool', ...
+                           'name', 'Pool_4', ...
+                           'method', 'avg', ...
+                           'pool', [5 5], ...
+                           'stride', 2, ...
+                           'pad', 2) ;
+                         
+% Group 5
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'CONV_5', ...
+                           'weights', {{init_weight('gaussian', 1, 1, 256, 512, 'single'), ... 
+                                        []}}, ...
+                           'learningRate', [1, 0], ...
+                           'stride', 1, ...
+                           'pad', 0, ...
+                           'weightDecay', [0, 0], ...
+                           'opts', {convOpts}) ;
+net.layers{end+1} = struct('type', 'bnorm', 'name', 'BN_5', ...
+                           'weights', {{ones(512, 1, 'single'), ...
+                                        zeros(512, 1, 'single'), ...
+                                        zeros(512, 2, 'single')}}, ...
+                           'learningRate', [1 1 0.01], ...
+                           'weightDecay', [0 0]) ;
+net.layers{end+1} = struct('type', 'relu', 'name', 'ReLU_5') ;
+net.layers{end+1} = struct('type', 'pool', ...
+                           'name', 'Pool_5', ...
+                           'method', 'avg', ...
+                           'pool', [16 16], ...
+                           'stride', 1, ...
+                           'pad', 0) ;
+
+% Full connect layer
+net.layers{end+1} = struct('type', 'conv', ...
+                           'name', 'FC',...
+                           'weights', {{init_weight('xavier', 1,1,512,2, 'single'), ...
+                                        0.01*ones(2, 1, 'single')}}, ...
+                           'learningRate', [1 2], ...
+                           'weightDecay', [1 0], ...
+                           'stride', 1, ...
+                           'pad', 0) ;
+
+% Softmax layer
+net.layers{end+1} = struct('type', 'softmaxloss', 'name', 'loss') ;
+
+% Meta parameters
+net.meta.inputSize = [512 512 1] ;
+
+lr = get_lr_sequence(opts.lrSequence);
+net.meta.trainOpts.learningRate = lr;
+net.meta.trainOpts.numEpochs = numel(lr) ;
+net.meta.trainOpts.batchSize = opts.batchSize ;
+net.meta.trainOpts.weightDecay = 0.01; % In the paper it is 0.01, 
+                                          %but it is only applied to Batch Normalization
+
+% Fill in default values
+net = vl_simplenn_tidy(net) ;
+
+% Switch to DagNN if requested
+switch lower(opts.networkType)
+  case 'simplenn'
+    % done
+  case 'dagnn'
+    net = dagnn.DagNN.fromSimpleNN(net, 'canonicalNames', true) ;
+    net.addLayer('error', dagnn.Loss('loss', 'classerror'), ...
+                 {'prediction','label'}, 'error') ;
+  otherwise
+    assert(false) ;
+end                          
+
+% -------------------------------------------------------------------------
+function weights = init_weight(weightInitMethod, h, w, in, out, type)
+% -------------------------------------------------------------------------
+% See K. He, X. Zhang, S. Ren, and J. Sun. Delving deep into
+% rectifiers: Surpassing human-level performance on imagenet
+% classification. CoRR, (arXiv:1502.01852v1), 2015.
+switch lower(weightInitMethod)
+  case 'gaussian'
+    sc = 0.01 ;
+    weights = randn(h, w, in, out, type)*sc;
+  case 'xavier'
+    sc = sqrt(3/(h*w*in)) ;
+    weights = (rand(h, w, in, out, type)*2 - 1)*sc ;
+ case 'xavierimproved'
+    sc = sqrt(2/(h*w*out)) ;
+    weights = randn(h, w, in, out, type)*sc ;    
+  otherwise
+    error('Unknown weight initialization method''%s''', weightInitMethod);
+end
+
+function lr = get_lr_sequence( lrGenerationMethod )
+
+switch lower(lrGenerationMethod)
+  case 'step_short'    
+    lr = 0.001 * ones(1, 2);
+    for i = 1:39
+       lr =[lr, lr(end-1:end)*0.9];
+    end
+  case 'log_short'
+    %lr = logspace(-3, -5, 80);
+    lr = logspace(-3, -5, 40 );
+  case 'step_long'
+    numInterationPerEpoch = 8000/64;
+    lrStepSize = 5000/numInterationPerEpoch; % 
+    totalStep = 220000/5000;  % CNN is trained for 120,000 iterations
+    lr = 0.001*ones(1,lrStepSize);
+    for i = 1:totalStep - 1
+      lr = [lr, lr(end-lrStepSize+1:end) *0.9];
+    end
+  case 'step_long2'
+    numInterationPerEpoch = 8000/64;
+    lrStepSize = 2500/numInterationPerEpoch; % 
+    totalStep = 12; % 8: 160 epoch 12: 240 epoch
+    lr = 0.001*ones(1,lrStepSize);
+    for i = 1:totalStep - 1
+      lr = [lr, lr(end-lrStepSize+1:end) *0.75];
+    end  
+  case 'step_long3'
+    numInterationPerEpoch = 8000/64;
+    lrStepSize = 2500/numInterationPerEpoch/2; % 
+    totalStep = 12;
+    lr = 0.001*ones(1,lrStepSize);
+    for i = 1:totalStep - 1
+      lr = [lr, lr(end-lrStepSize+1:end) *0.5];
+    end    
+  otherwise
+    error('unkown type of lr sequence generation method''%s''', lrGenerationMethod);
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/examples/PhaseAwareNet/cnn_phaseaware_imdb_setup.m

@@ -0,0 +1,149 @@
+function imdb = cnn_phaseaware_imdb_setup( varargin )
+
+opts.seed = 0;
+opts.coverPath = 'C:\DeepLearning\matconvnet-1.0-beta20\data\JStego\75_mat';
+opts.stegoPath = 'C:\DeepLearning\matconvnet-1.0-beta20\data\JStego\JUNI_0.4_mat';
+opts.ratio = [0.6, 0.15, 0.25]; % train, validation, and test
+opts.libSize = inf;
+opts = vl_argparse( opts, varargin );
+
+rng( opts.seed );
+opts.ratio = opts.ratio/sum(opts.ratio);
+
+% -------------------------------------------------------------------------
+%                                                              Sanity Check
+% -------------------------------------------------------------------------
+fprintf('sanity check the library images ...') ;
+targetSize = 10000;
+expArray = linspace(1, targetSize, targetSize);
+
+% first, sanilty the two data base
+list = dir(fullfile(opts.coverPath, '*.mat'));
+tokens = regexp({list.name}, '([\d]+).mat', 'tokens') ;
+nameArray = cellfun(@(x) sscanf(x{1}{1}, '%d'), tokens) ;
+if( ~isequal( sort(nameArray), expArray ) ) 
+  error('coverPath = %s is corrupted', opts.coverPath);
+end
+
+list = dir(fullfile(opts.stegoPath, '*.mat'));
+tokens = regexp({list.name}, '([\d]+).mat', 'tokens') ;
+nameArray = cellfun(@(x) sscanf(x{1}{1}, '%d'), tokens) ;
+if( ~isequal( sort(nameArray), expArray ) ) 
+  error('stegoPath = %s is corrupted', opts.stegoPath);
+end
+fprintf('[checked]\n') ;
+
+% meta
+randomImages = randperm( targetSize );
+
+totalSize = min( opts.libSize, targetSize );
+
+numTrn = fix( totalSize * opts.ratio(1));
+numVal = fix( totalSize * opts.ratio(2));
+numTst = fix( totalSize * opts.ratio(3));
+
+imdb.classes.name = {'Cover', 'Stego'} ;
+n = strfind(opts.coverPath, filesep);
+if( isempty( n ) )
+  coverDes = 'Cover Images';
+else
+  coverDes = opts.coverPath(n(end)+1:end);
+end
+
+n = strfind(opts.stegoPath, filesep);
+if( isempty( n ) )  
+  stegoDes = 'Stego Images';
+else
+  stegoDes = opts.stegoPath(n(end)+1:end);
+end
+
+imdb.classes.description = {coverDes, stegoDes} ;
+imdb.classes.coverPath = opts.coverPath;
+imdb.classes.stegoPath = opts.stegoPath;
+
+fprintf('%d Trn Image, %d Val Images, and %d Test Images \n ', ...
+         numTrn, numVal, numTst) ;
+
+% -------------------------------------------------------------------------
+%                                                           Training images
+% -------------------------------------------------------------------------
+fprintf('searching training images ...') ;
+
+names = cell(1, numTrn * 2 );
+labels = ones(1, numTrn * 2 );              
+for i = 1:numTrn
+  
+   idx = randomImages(i);
+  
+   names{2*i-1} = fullfile(opts.coverPath, strcat(num2str(idx),'.mat'));   
+   labels(2*i - 1) = 1;
+      
+   names{2*i} = fullfile(opts.stegoPath, strcat(num2str(idx),'.mat'));
+   labels(2*i) = 2;
+end
+
+imdb.images.id = 1:numel(names) ;
+imdb.images.name = names ;
+imdb.images.set = ones(1, numel(names)) ;
+imdb.images.label = labels ;
+
+fprintf('done\n') ;
+% -------------------------------------------------------------------------
+%                                                         Validation images
+% -------------------------------------------------------------------------
+fprintf('searching validation images ...') ;
+
+names = cell(1, numVal * 2 );
+labels = ones(1, numVal * 2 );
+
+for i = 1:numVal
+  
+   idx = randomImages( numTrn + i);
+  
+   names{2*i-1} = fullfile(opts.coverPath, strcat(num2str(idx),'.mat'));   
+   labels(2*i - 1) = 1;
+      
+   names{2*i} = fullfile(opts.stegoPath, strcat(num2str(idx),'.mat'));
+   labels(2*i) = 2;
+
+end
+
+imdb.images.id  = horzcat( imdb.images.id, (1:numel(names)) + 1e7 - 1 );
+imdb.images.name = horzcat(imdb.images.name, names );
+imdb.images.set = horzcat( imdb.images.set, 2 * ones(1, numel(names)));
+imdb.images.label = horzcat( imdb.images.label, labels ) ;
+
+fprintf('done\n') ;
+
+% -------------------------------------------------------------------------
+%                                                               Test images
+% -------------------------------------------------------------------------
+
+fprintf('searching test images ...') ;
+
+names = cell(1, numTst * 2 );
+labels = ones(1, numTst * 2 );
+
+for i = 1:numTst
+  
+   idx = randomImages( numTrn + numVal + i);
+  
+   names{2*i-1} = fullfile(opts.coverPath, strcat(num2str(idx),'.mat'));   
+   labels(2*i - 1) = 1;
+      
+   names{2*i} = fullfile(opts.stegoPath, strcat(num2str(idx),'.mat'));
+   labels(2*i) = 2;
+
+end
+
+imdb.images.id  = horzcat( imdb.images.id, (1:numel(names)) + 2e7 - 1 );
+imdb.images.name = horzcat(imdb.images.name, names );
+imdb.images.set = horzcat( imdb.images.set, 3 * ones(1, numel(names)));
+imdb.images.label = horzcat( imdb.images.label, labels ) ;
+
+fprintf('done\n') ;
+
+
+
+
+

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/examples/PhaseAwareNet/test_phaseaware.m

@@ -0,0 +1,72 @@
+function [stats, state] = test_phaseaware(varargin)
+% Test the phasesplit net
+
+opts.batchSize = 40;
+opts.expDir = fullfile('data', 'JUNI-7504-PNet-dagnn-40-Seed-0-log_short') ;
+opts.testEpoch = 40;
+opts.testSelect = [0, 1, 1]; % (1) training; (2)validation; (3), testing 
+opts.saveResult = true;
+opts.bnRefine = true; 
+
+opts = vl_argparse( opts, varargin );
+
+opts.imdbPath = fullfile(opts.expDir, 'imdb.mat');
+
+opts.train = struct('gpus', [1, 2], 'cudnn', true, 'stegoShuffle', false ) ; 
+%opts.train = struct('gpus', [], 'stegoShuffle', true) ; // CPU debugging
+if ~isfield(opts.train, 'gpus'), opts.train.gpus = []; end;
+
+% put it to drawing
+if ( ~exist( opts.expDir, 'dir' ) )
+    error('expDir is empty' ); 
+end
+
+% -------------------------------------------------------------------------
+%                                                         Find the data base
+% -------------------------------------------------------------------------
+if exist(opts.imdbPath, 'file')
+  imdb = load(opts.imdbPath) ;
+else
+  error(' cannot find imdb' );
+end
+
+meta.inputSize = [512, 512, 1, opts.batchSize];
+
+[state, stats] = cnn_test_dag(imdb, getBatchFn( opts, meta ), ...
+                      'expDir', opts.expDir, ...
+                      'batchSize', opts.batchSize, ...
+                      'testEpoch', opts.testEpoch, ...
+                      'testSelect', opts.testSelect, ... 
+                      'saveResult', opts.saveResult, ...
+                      'bnRefine', opts.bnRefine, ...
+                      opts.train ) ;
+
+                    
+% -------------------------------------------------------------------------
+function fn = getBatchFn(opts, meta)
+% -------------------------------------------------------------------------
+bopts.useGpu = numel(opts.train.gpus) > 0 ;
+bopts.imageSize = meta.inputSize;
+    
+fn = @(x,y) getDagNNBatch(bopts,x,y) ;
+
+        
+% -------------------------------------------------------------------------
+function inputs = getDagNNBatch(opts, imdb, batch)
+% -------------------------------------------------------------------------
+% label
+labels = imdb.images.label(1,batch) ;
+% images
+images = zeros(opts.imageSize(1), opts.imageSize(2), ...
+               opts.imageSize(3), numel(batch), 'single') ;
+for i = 1:numel(batch)
+%   imt = imread(imdb.images.name{batch(i)});
+%   images(:,:,:,i) = single(imt);   
+   imt = load(imdb.images.name{batch(i)}, 'im');
+   images(:,:,:,i) = single(imt.im);
+end
+
+if opts.useGpu > 0
+  images = gpuArray(images) ;
+end
+inputs = {'input', images, 'label', labels} ;

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/examples/cnn_bnrefine_dag.m

@@ -0,0 +1,284 @@
+function [BN_Moments,stats] = cnn_bnrefine_dag( imdb, getBatch, varargin)
+%CNN_TEST_DAG Demonstrates test a CNN using the DagNN wrapper
+%    CNN_TEST_DAG() is a slim version to CNN_TRAIN_DAG(), just do the
+%    testing of the final net in the export 
+
+opts.expDir = fullfile('data','exp') ;
+opts.batchSize = 256 ;
+opts.train = [] ;
+opts.val = [] ;
+opts.test = [];
+opts.gpus = [] ;
+opts.prefetch = false ;
+opts.testEpoch = inf;
+opts.bnEpochCollectSize = 2000;
+opts.saveResult = true;
+
+opts.randomSeed = 0 ;
+opts.stegoShuffle = false;
+opts.cudnn = true ;
+opts.extractStatsFn = @extractStats ;
+
+opts = vl_argparse(opts, varargin) ;
+
+if ~exist(opts.expDir, 'dir'), mkdir(opts.expDir) ; end
+if isempty(opts.train), opts.train = find(imdb.images.set==1) ; end
+if isnan(opts.train), opts.train = [] ; end
+
+% we must restrict the BN moment pooling from train set only
+
+% -------------------------------------------------------------------------
+%                                                            Initialization
+% -------------------------------------------------------------------------
+
+state.getBatch = getBatch ;
+
+% -------------------------------------------------------------------------
+%                                                        Train and validate
+% -------------------------------------------------------------------------
+
+modelPath = @(ep) fullfile(opts.expDir, sprintf('net-epoch-%d.mat', ep));
+resultPath  = @(ep) fullfile(opts.expDir, sprintf('bn-epoch-%d.mat', ep));
+
+start = findLastCheckpoint(opts.expDir) ;
+if( start < 1 )
+  error( 'Found no net' );
+end
+
+if start >= 1
+  start = min(start, opts.testEpoch);
+  fprintf('%s: testing by loading epoch %d\n', mfilename, start) ;
+  net = loadState(modelPath(start)) ;
+end
+
+% First, create the structure to pool the BN moments
+numLayers = numel(net.layers);
+
+BN_Moments = struct('layer', {}, ...
+                    'name', {}, ... 
+                    'inputs', {}, ...
+                    'outputs', {}, ...
+                    'shape', {}, ...
+                    'dataType', {}, ...
+                    'oldValue', {}, ...
+                    'hist', {} ) ;
+                        
+for i = 1:numLayers
+  if ( isa( net.layers(i).block, 'dagnn.BatchNorm') )
+    % Neet to save the BN moments for pooling
+    net.layers(i).block.computeMoment = true;  
+  
+    name = net.layers(i).params{3};
+    dataType = class(net.getParam(name).value);
+    shape = size(net.getParam(name).value);
+    
+    BN_Moments(end+1).layer  = net.layers(i).name;
+    BN_Moments(end).name     = name ;
+    BN_Moments(end).inputs   = net.layers(i).inputs;
+    BN_Moments(end).outputs  = net.layers(i).outputs; 
+    BN_Moments(end).shape    = shape ;
+    BN_Moments(end).dataType = dataType ;
+    BN_Moments(end).oldValue = net.getParam(name).value;
+  end
+end
+
+
+if( numel(opts.gpus) > 1 )
+  error( 'cannot support multiple GPU now ')
+end
+
+numEpoch = ceil(opts.bnEpochCollectSize/(numel(opts.train)/opts.batchSize));
+  
+rng(start + opts.randomSeed) ;
+
+for epoch = start:start + numEpoch - 1
+  
+  % Set the random seed based on the epoch and opts.randomSeed.
+  % This is important for reproducibility, including when training
+  % is restarted from a checkpoint.
+  
+  prepareGPUs( opts, true ) ;
+
+  % Train for one epoch.
+  state.epoch = epoch ;
+  
+  % shuffle
+  if( opts.stegoShuffle )
+   
+    N = numel(opts.train); % TRN
+    
+    Lab = max( 1, numel(opts.gpus));
+    
+    % M and N must be even, and multiple Lab
+    assert( rem( N, 2*Lab ) == 0 );
+      
+    seq = opts.train( 2*randperm(N/2) - 1 );
+    seq = reshape( seq, Lab, N/(2*Lab) );
+    state.train = reshape( [seq; seq+1], 1, N );
+          
+  else
+    
+    state.train = opts.train(randperm(numel(opts.train))) ;
+  
+  end
+  
+  state.imdb = imdb ;
+  
+  % keep pooling the result
+  [stats.train(epoch - start + 1), BN_Moments] = process_epoch(net, state, opts, BN_Moments ) ;
+  
+end
+
+% Reset the parameters
+for i = 1:numel(BN_Moments)
+  bn_moment_name = BN_Moments(i).name; 
+  statsVal = median(BN_Moments(i).hist, 3);
+
+  % set the new value
+  paramIdx = net.getParamIndex(bn_moment_name);
+  % double check the shape, see if it matches
+  assert( isequal(size(statsVal), size(net.params(paramIdx).value ) ) );
+
+  % reset the BN moment parameters
+  net.params(paramIdx).value = statsVal;
+end
+
+% Revert it back
+for i = 1:numel(net.layers)
+  if ( isa( net.layers(i).block, 'dagnn.BatchNorm') )
+     net.layers(i).block.computeMoment = false;
+  end
+end
+
+
+saveState(resultPath(start), net, stats, BN_Moments ) ;
+
+% -------------------------------------------------------------------------
+function [stats, BN_Moments] = process_epoch(net, state, opts, BN_Moments )
+% -------------------------------------------------------------------------
+
+% move CNN  to GPU as needed
+numGpus = numel(opts.gpus) ;
+if numGpus >= 1
+  net.move('gpu') ;
+end
+
+subset = state.train;
+num = 0 ;
+stats.num = 0 ; % return something even if subset = []
+stats.time = 0 ;
+adjustTime = 0 ;
+
+start = tic ;
+for t=1:opts.batchSize:numel(subset)
+  fprintf('%s: epoch %02d: %3d/%3d:', 'test', state.epoch, ...
+          fix((t-1)/opts.batchSize)+1, ceil(numel(subset)/opts.batchSize)) ;
+  batchSize = min(opts.batchSize, numel(subset) - t + 1) ;
+ 
+  % get this image batch and prefetch the next
+  s = 1;
+  batchStart = t + (labindex-1) + (s-1) * numlabs ;
+  batchEnd = min(t+opts.batchSize-1, numel(subset)) ;
+  batch = subset(batchStart : numlabs : batchEnd) ;
+  num = num + numel(batch) ;
+  if numel(batch) == 0, continue ; end
+
+  inputs = state.getBatch(state.imdb, batch) ;
+
+  net.mode = 'test' ;
+
+  net.eval(inputs) ;
+
+  % update here
+  for i = 1:numel(BN_Moments)
+    layer_name = BN_Moments(i).layer;
+    newVal = gather( net.getLayer(layer_name).block.moments );
+    assert( ~isempty( newVal ) ); % in case the BatchNorm is not set up
+    BN_Moments(i).hist = cat( 3,  BN_Moments(i).hist, newVal ); 
+  end
+    
+  
+  % get statistics
+  time = toc(start) + adjustTime ;
+  batchTime = time - stats.time ;
+  stats = opts.extractStatsFn(net) ;
+  stats.num = num ;
+  stats.time = time ;
+  currentSpeed = batchSize / batchTime ;
+  averageSpeed = (t + batchSize - 1) / time ;
+  if t == opts.batchSize + 1
+    % compensate for the first iteration, which is an outlier
+    adjustTime = 2*batchTime - time ;
+    stats.time = time + adjustTime ;
+  end
+
+  fprintf(' %.1f (%.1f) Hz', averageSpeed, currentSpeed) ;
+  for f = setdiff(fieldnames(stats)', {'num', 'time'})
+    f = char(f) ;
+    fprintf(' %s:', f) ;
+    fprintf(' %.3f', stats.(f)) ;
+  end
+  fprintf('\n') ;
+end
+
+net.reset() ;
+net.move('cpu') ;
+
+
+% -------------------------------------------------------------------------
+function stats = extractStats(net)
+% -------------------------------------------------------------------------
+sel = find(cellfun(@(x) isa(x,'dagnn.Loss'), {net.layers.block})) ;
+stats = struct() ;
+for i = 1:numel(sel)
+  stats.(net.layers(sel(i)).outputs{1}) = net.layers(sel(i)).block.average ;
+end
+
+% -------------------------------------------------------------------------
+function saveState(fileName, net, stats, BN_Moments )
+% -------------------------------------------------------------------------
+net_ = net ;
+net = net_.saveobj() ;
+save(fileName, 'net', 'stats', 'BN_Moments') ;
+
+% -------------------------------------------------------------------------
+function net = loadState(fileName)
+% -------------------------------------------------------------------------
+load(fileName, 'net' ) ;
+net = dagnn.DagNN.loadobj(net) ;
+
+% -------------------------------------------------------------------------
+function epoch = findLastCheckpoint(modelDir)
+% -------------------------------------------------------------------------
+list = dir(fullfile(modelDir, 'net-epoch-*.mat')) ;
+tokens = regexp({list.name}, 'net-epoch-([\d]+).mat', 'tokens') ;
+epoch = cellfun(@(x) sscanf(x{1}{1}, '%d'), tokens) ;
+epoch = max([epoch 0]) ;
+
+
+% -------------------------------------------------------------------------
+function prepareGPUs(opts, cold)
+% -------------------------------------------------------------------------
+numGpus = numel(opts.gpus) ;
+if numGpus > 1
+  % check parallel pool integrity as it could have timed out
+  pool = gcp('nocreate') ;
+  if ~isempty(pool) && pool.NumWorkers ~= numGpus
+    delete(pool) ;
+  end
+  pool = gcp('nocreate') ;
+  if isempty(pool)
+    parpool('local', numGpus) ;
+    cold = true ;
+  end
+end
+if numGpus >= 1 && cold
+  fprintf('%s: resetting GPU\n', mfilename)
+  if numGpus == 1
+    gpuDevice(opts.gpus)
+  else
+    spmd, gpuDevice(opts.gpus(labindex)), end
+  end
+end
+
+%end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/examples/cnn_test_dag.m

@@ -0,0 +1,341 @@
+function [state,stats] = cnn_test_dag( imdb, getBatch, varargin)
+%CNN_TEST_DAG Demonstrates test a CNN using the DagNN wrapper
+%    CNN_TEST_DAG() is a slim version to CNN_TRAIN_DAG(), just do the
+%    testing of the final net in the export 
+
+opts.expDir = fullfile('data','exp') ;
+opts.batchSize = 256 ;
+opts.numSubBatches = 1 ;
+opts.train = [] ;
+opts.val = [] ;
+opts.test = [];
+opts.gpus = [] ;
+opts.prefetch = false ;
+opts.testEpoch = inf;
+opts.testSelect = [1, 1, 1]; % (1) training; (2)validation; (3), testing 
+opts.saveResult = true;
+opts.bnRefine = false;
+
+opts.randomSeed = 0 ;
+opts.stegoShuffle = false;
+opts.cudnn = true ;
+opts.extractStatsFn = @extractStats ;
+
+opts = vl_argparse(opts, varargin) ;
+
+if ~exist(opts.expDir, 'dir'), mkdir(opts.expDir) ; end
+if isempty(opts.train), opts.train = find(imdb.images.set==1) ; end
+if isempty(opts.val), opts.val = find(imdb.images.set==2) ; end
+if isempty(opts.test), opts.test = find(imdb.images.set==3); end
+if isnan(opts.train), opts.train = [] ; end
+
+% -------------------------------------------------------------------------
+%                                                            Initialization
+% -------------------------------------------------------------------------
+
+state.getBatch = getBatch ;
+
+% -------------------------------------------------------------------------
+%                                                        Train and validate
+% -------------------------------------------------------------------------
+
+if ( opts.bnRefine )
+  modelPath = @(ep) fullfile(opts.expDir, sprintf('bn-epoch-%d.mat', ep));
+  resultPath  = @(ep) fullfile(opts.expDir, sprintf('test-bn-epoch-%d.mat', ep));
+else
+  modelPath = @(ep) fullfile(opts.expDir, sprintf('net-epoch-%d.mat', ep));
+  resultPath  = @(ep) fullfile(opts.expDir, sprintf('test-net-epoch-%d.mat', ep));
+end
+
+start = findLastCheckpoint(opts.expDir) ;
+if( start < 1 )
+  error( 'Found no net' );
+end
+
+if start >= 1
+  start = min(start, opts.testEpoch);
+  fprintf('%s: testing by loading epoch name %s\n', mfilename, modelPath(start) );
+  net = loadState(modelPath(start)) ;
+end
+
+% Make sure that we use the estimated BN moments
+for i = 1:numel(net.layers)
+  if ( isa( net.layers(i).block, 'dagnn.BatchNorm') )
+    net.layers(i).block.computeMoment = false;
+  end
+end
+
+
+for epoch = start
+  
+  % Set the random seed based on the epoch and opts.randomSeed.
+  % This is important for reproducibility, including when training
+  % is restarted from a checkpoint.
+  
+  rng(epoch + opts.randomSeed) ;
+  prepareGPUs(opts, true ) ;
+
+  % Train for one epoch.
+  state.epoch = epoch ;
+  
+  % shuffle
+  if( opts.stegoShuffle )
+   
+    N = numel(opts.train); % TRN
+    M = numel(opts.val);   % VAL
+    K = numel(opts.test);  % TST
+    
+    Lab = max( 1, numel(opts.gpus));
+    
+    % M and N must be even, and multiple Lab
+    assert( ( rem( N, 2*Lab ) == 0 ) & ...
+            ( rem( M, 2*Lab ) == 0 ) & ...
+            ( rem( K, 2*Lab ) == 0 ) );
+      
+    seq = opts.train( 2*randperm(N/2) - 1 );
+    seq = reshape( seq, Lab, N/(2*Lab) );
+    state.train = reshape( [seq; seq+1], 1, N );
+        
+    seq = opts.val( 2*randperm(M/2) - 1 );
+    seq = reshape( seq, Lab, M/(2*Lab) );
+    state.val = reshape( [seq; seq+1], 1, M );
+        
+    seq = opts.test( 2*randperm(K/2) - 1 );
+    seq = reshape( seq, Lab, K/(2*Lab) );
+    state.test = reshape( [seq; seq+1], 1, K );
+    
+  else
+    
+    state.train = opts.train(randperm(numel(opts.train))) ; 
+    state.val = opts.val(randperm(numel(opts.val))) ;
+    state.test = opts.test(randperm(numel(opts.test))) ;
+
+%     N = numel(opts.train); % TRN
+%     M = numel(opts.val);   % VAL
+%     K = numel(opts.test);  % TST
+%     
+% 
+%     state.train = opts.train([1:2:N, 2:2:N]);
+%     state.val = opts.val([1:2:M, 2:2:M]);
+%     state.test = opts.test([1:2:K, 2:2:K]);
+
+  end
+  
+  state.imdb = imdb ;
+
+  if numel(opts.gpus) <= 1
+    if( opts.testSelect(1) )
+      stats.train = process_epoch(net, state, opts, 'train') ;
+    end
+    if( opts.testSelect(2) )
+      stats.val   = process_epoch(net, state, opts, 'val') ;
+    end
+    if( opts.testSelect(3) )
+      stats.test  = process_epoch(net, state, opts, 'test');
+    end
+
+  else
+    savedNet = net.saveobj() ;
+    spmd
+      net_ = dagnn.DagNN.loadobj(savedNet) ;
+      if( opts.testSelect(1) ) 
+        stats_.train = process_epoch(net_, state, opts, 'train') ;
+      end
+      if( opts.testSelect(2) ) 
+        stats_.val   = process_epoch(net_, state, opts, 'val') ;
+      end
+      if( opts.testSelect(3) )
+        stats_.test  = process_epoch(net_, state, opts, 'test');
+      end
+      if labindex == 1, savedNet_ = net_.saveobj() ; end
+    end
+    net = dagnn.DagNN.loadobj(savedNet_{1}) ;
+    stats__ = accumulateStats(stats_) ;
+    
+    if( opts.testSelect(1) )
+      stats.train = stats__.train ;
+    end
+    if( opts.testSelect(2) )
+      stats.val   = stats__.val ;
+    end
+    if( opts.testSelect(3) )
+      stats.test  = stats__.test;
+    end
+
+    clear net_ stats_ stats__ savedNet savedNet_ ;
+  end
+
+  % save  
+  if( opts.saveResult == true )
+    saveState(resultPath(epoch), net, stats, state) ;
+  end
+ 
+end
+
+% -------------------------------------------------------------------------
+function stats = process_epoch(net, state, opts, mode)
+% -------------------------------------------------------------------------
+
+% move CNN  to GPU as needed
+numGpus = numel(opts.gpus) ;
+if numGpus >= 1
+  net.move('gpu') ;
+end
+
+subset = state.(mode) ;
+num = 0 ;
+stats.num = 0 ; % return something even if subset = []
+stats.time = 0 ;
+adjustTime = 0 ;
+
+start = tic ;
+for t=1:opts.batchSize:numel(subset)
+  fprintf('%s: epoch %02d: %3d/%3d:', mode, state.epoch, ...
+          fix((t-1)/opts.batchSize)+1, ceil(numel(subset)/opts.batchSize)) ;
+  batchSize = min(opts.batchSize, numel(subset) - t + 1) ;
+
+  for s=1:opts.numSubBatches
+    % get this image batch and prefetch the next
+    batchStart = t + (labindex-1) + (s-1) * numlabs ;
+    batchEnd = min(t+opts.batchSize-1, numel(subset)) ;
+    batch = subset(batchStart : opts.numSubBatches * numlabs : batchEnd) ;
+    num = num + numel(batch) ;
+    if numel(batch) == 0, continue ; end
+
+    inputs = state.getBatch(state.imdb, batch) ;
+
+    if opts.prefetch
+      if s == opts.numSubBatches
+        batchStart = t + (labindex-1) + opts.batchSize ;
+        batchEnd = min(t+2*opts.batchSize-1, numel(subset)) ;
+      else
+        batchStart = batchStart + numlabs ;
+      end
+      nextBatch = subset(batchStart : opts.numSubBatches * numlabs : batchEnd) ;
+      state.getBatch(state.imdb, nextBatch) ;
+    end
+    
+    net.mode = 'test' ;
+    net.eval(inputs) ;
+  end
+
+  % get statistics
+  time = toc(start) + adjustTime ;
+  batchTime = time - stats.time ;
+  stats = opts.extractStatsFn(net) ;
+  stats.num = num ;
+  stats.time = time ;
+  currentSpeed = batchSize / batchTime ;
+  averageSpeed = (t + batchSize - 1) / time ;
+  if t == opts.batchSize + 1
+    % compensate for the first iteration, which is an outlier
+    adjustTime = 2*batchTime - time ;
+    stats.time = time + adjustTime ;
+  end
+
+  fprintf(' %.1f (%.1f) Hz', averageSpeed, currentSpeed) ;
+  for f = setdiff(fieldnames(stats)', {'num', 'time'})
+    f = char(f) ;
+    fprintf(' %s:', f) ;
+    fprintf(' %.3f', stats.(f)) ;
+  end
+  fprintf('\n') ;
+end
+
+net.reset() ;
+net.move('cpu') ;
+
+
+% -------------------------------------------------------------------------
+function stats = accumulateStats(stats_)
+% -------------------------------------------------------------------------
+
+for s = {'train', 'val', 'test'}
+  s = char(s) ;
+  total = 0 ;
+
+  % initialize stats stucture with same fields and same order as
+  % stats_{1}
+  stats__ = stats_{1} ;
+  if ( ~isfield(stats__, s) ) 
+    continue; 
+  end
+  names = fieldnames(stats__.(s))' ;
+  values = zeros(1, numel(names)) ;
+  fields = cat(1, names, num2cell(values)) ;
+  stats.(s) = struct(fields{:}) ;
+
+  for g = 1:numel(stats_)
+    stats__ = stats_{g} ;
+    num__ = stats__.(s).num ;
+    total = total + num__ ;
+
+    for f = setdiff(fieldnames(stats__.(s))', 'num')
+      f = char(f) ;
+      stats.(s).(f) = stats.(s).(f) + stats__.(s).(f) * num__ ;
+
+      if g == numel(stats_)
+        stats.(s).(f) = stats.(s).(f) / total ;
+      end
+    end
+  end
+  stats.(s).num = total ;
+end
+
+% -------------------------------------------------------------------------
+function stats = extractStats(net)
+% -------------------------------------------------------------------------
+sel = find(cellfun(@(x) isa(x,'dagnn.Loss'), {net.layers.block})) ;
+stats = struct() ;
+for i = 1:numel(sel)
+  stats.(net.layers(sel(i)).outputs{1}) = net.layers(sel(i)).block.average ;
+end
+
+% -------------------------------------------------------------------------
+function saveState(fileName, net, stats, state )
+% -------------------------------------------------------------------------
+net_ = net ;
+net = net_.saveobj() ;
+save(fileName, 'net', 'stats', 'state') ;
+
+% -------------------------------------------------------------------------
+function [net, stats] = loadState(fileName)
+% -------------------------------------------------------------------------
+load(fileName, 'net', 'stats') ;
+net = dagnn.DagNN.loadobj(net) ;
+
+% -------------------------------------------------------------------------
+function epoch = findLastCheckpoint(modelDir)
+% -------------------------------------------------------------------------
+list = dir(fullfile(modelDir, 'net-epoch-*.mat')) ;
+tokens = regexp({list.name}, 'net-epoch-([\d]+).mat', 'tokens') ;
+epoch = cellfun(@(x) sscanf(x{1}{1}, '%d'), tokens) ;
+epoch = max([epoch 0]) ;
+
+
+% -------------------------------------------------------------------------
+function prepareGPUs(opts, cold)
+% -------------------------------------------------------------------------
+numGpus = numel(opts.gpus) ;
+if numGpus > 1
+  % check parallel pool integrity as it could have timed out
+  pool = gcp('nocreate') ;
+  if ~isempty(pool) && pool.NumWorkers ~= numGpus
+    delete(pool) ;
+  end
+  pool = gcp('nocreate') ;
+  if isempty(pool)
+    parpool('local', numGpus) ;
+    cold = true ;
+  end
+end
+if numGpus >= 1 && cold
+  fprintf('%s: resetting GPU\n', mfilename)
+  if numGpus == 1
+    gpuDevice(opts.gpus)
+  else
+    spmd, gpuDevice(opts.gpus(labindex)), end
+  end
+end
+
+%end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/examples/cnn_train_dag.m

@@ -0,0 +1,516 @@
+function [net,stats] = cnn_train_dag(net, imdb, getBatch, varargin)
+%CNN_TRAIN_DAG Demonstrates training a CNN using the DagNN wrapper
+%    CNN_TRAIN_DAG() is similar to CNN_TRAIN(), but works with
+%    the DagNN wrapper instead of the SimpleNN wrapper.
+
+% Copyright (C) 2014-16 Andrea Vedaldi.
+% All rights reserved.
+%
+% This file is part of the VLFeat library and is made available under
+% the terms of the BSD license (see the COPYING file).
+
+opts.expDir = fullfile('data','exp') ;
+opts.continue = true ;
+opts.batchSize = 256 ;
+opts.numSubBatches = 1 ;
+opts.train = [] ;
+opts.val = [] ;
+opts.gpus = [] ;
+opts.prefetch = false ;
+opts.numEpochs = 300 ;
+opts.learningRate = 0.001 ;
+opts.weightDecay = 0.0005 ;
+opts.momentum = 0.9 ;
+opts.randomSeed = 0 ;
+opts.stegoShuffle = false;
+opts.computeBNMoment = false;
+opts.memoryMapFile = fullfile(tempdir, 'matconvnet.bin') ;
+opts.profile = false ;
+opts.cudnn = true ;
+
+opts.derOutputs = {'objective', 1} ;
+opts.extractStatsFn = @extractStats ;
+opts.plotStatistics = true;
+opts = vl_argparse(opts, varargin) ;
+
+if ~exist(opts.expDir, 'dir'), mkdir(opts.expDir) ; end
+if isempty(opts.train), opts.train = find(imdb.images.set==1) ; end
+if isempty(opts.val), opts.val = find(imdb.images.set==2) ; end
+if isnan(opts.train), opts.train = [] ; end
+
+% -------------------------------------------------------------------------
+%                                                            Initialization
+% -------------------------------------------------------------------------
+
+evaluateMode = isempty(opts.train) ;
+if ~evaluateMode
+  if isempty(opts.derOutputs)
+    error('DEROUTPUTS must be specified when training.\n') ;
+  end
+end
+
+state.getBatch = getBatch ;
+stats = [] ;
+
+% -------------------------------------------------------------------------
+%                                                        Train and validate
+% -------------------------------------------------------------------------
+
+modelPath = @(ep) fullfile(opts.expDir, sprintf('net-epoch-%d.mat', ep));
+modelFigPath = fullfile(opts.expDir, 'net-train.pdf') ;
+
+start = opts.continue * findLastCheckpoint(opts.expDir) ;
+if start >= 1
+  fprintf('%s: resuming by loading epoch %d\n', mfilename, start) ;
+  [net, stats] = loadState(modelPath(start)) ;
+end
+
+if ( opts.computeBNMoment == true )
+  % Validation without using the moving average of BN momemnts
+  for i = 1:numel(net.layers)
+    if ( isa( net.layers(i).block, 'dagnn.BatchNorm') )
+      net.layers(i).block.computeMoment = true;
+    end
+  end
+end
+
+
+for epoch=start+1:opts.numEpochs
+
+  % Set the random seed based on the epoch and opts.randomSeed.
+  % This is important for reproducibility, including when training
+  % is restarted from a checkpoint.
+
+  rng(epoch + opts.randomSeed) ;
+  prepareGPUs(opts, epoch == start+1) ;
+
+  % Train for one epoch.
+  state.epoch = epoch ;
+  state.learningRate = opts.learningRate(min(epoch, numel(opts.learningRate))) ;
+  
+  %state.train = opts.train(randperm(numel(opts.train))) ; % shuffle
+  %state.val = opts.val(randperm(numel(opts.val))) ;
+  
+  % shuffle
+  if( opts.stegoShuffle == 1 )
+    
+    N = numel(opts.train); 
+    M = numel(opts.val);
+    Lab = max(1, numel(opts.gpus));
+    
+    % M and N must be even, and multiple Lab
+    assert( ( rem(N, 2*Lab) == 0 ) & ( rem(M, 2*Lab) == 0 ) );
+        
+%     state.train(1:2:N) = opts.train(2*randperm(N/2) - 1);
+%     state.train(2:2:N) = state.train(1:2:N) + 1;
+%    
+%     state.val(1:2:M) = opts.val(2*randperm(M/2) - 1);
+%     state.val(2:2:M) = state.val(1:2:M) + 1;
+
+    seq = opts.train(2*randperm(N/2) - 1);
+    seq = reshape(seq, Lab, N/(2*Lab));
+    state.train = reshape([seq; seq+1], 1, N);
+        
+    seq = opts.val(2*randperm(M/2) - 1);
+    seq = reshape(seq, Lab, M/(2*Lab));
+    state.val = reshape([seq; seq+1], 1, M);
+
+  elseif ( opts.stegoShuffle < 0 )
+     % for regression task
+     K = abs( opts.stegoShuffle );
+     
+     M = numel(opts.train)/K; 
+     seq =  K * ( randperm(M) - 1 );
+     seq = [seq + 1; seq + 2; seq + 3; seq + 4; seq + 5; seq + 6];
+     seq = reshape(seq, numel(seq), 1);
+     state.train = opts.train(seq);
+     
+     
+     N = numel(opts.val)/K; 
+     seq =  K * ( randperm(N) - 1 ) ;
+     seq = [seq + 1; seq + 2; seq + 3; seq + 4; seq + 5; seq + 6];
+     seq = reshape(seq, numel(seq), 1);
+     state.val = opts.val(seq);
+         
+  else
+    state.train = opts.train(randperm(numel(opts.train))) ; 
+    state.val = opts.val(randperm(numel(opts.val))) ;
+  end
+  state.imdb = imdb ;
+
+  if numel(opts.gpus) <= 1
+    [stats.train(epoch),prof] = process_epoch(net, state, opts, 'train') ;
+    stats.val(epoch) = process_epoch(net, state, opts, 'val') ;
+    if opts.profile
+      profview(0,prof) ;
+      keyboard ;
+    end
+  else
+    savedNet = net.saveobj() ;
+    spmd
+      net_ = dagnn.DagNN.loadobj(savedNet) ;
+      [stats_.train, prof_] = process_epoch(net_, state, opts, 'train') ;
+      stats_.val = process_epoch(net_, state, opts, 'val') ;
+      if labindex == 1, savedNet_ = net_.saveobj() ; end
+    end
+    net = dagnn.DagNN.loadobj(savedNet_{1}) ;
+    stats__ = accumulateStats(stats_) ;
+    stats.train(epoch) = stats__.train ;
+    stats.val(epoch) = stats__.val ;
+    if opts.profile
+      mpiprofile('viewer', [prof_{:,1}]) ;
+      keyboard ;
+    end
+    clear net_ stats_ stats__ savedNet savedNet_ ;
+  end
+
+  % save
+  if ~evaluateMode
+    saveState(modelPath(epoch), net, stats) ;
+  end
+
+  if opts.plotStatistics
+    switchFigure(1) ; clf ;
+    plots = setdiff(...
+      cat(2,...
+      fieldnames(stats.train)', ...
+      fieldnames(stats.val)'), {'num', 'time'}) ;
+    for p = plots
+      p = char(p) ;
+      values = zeros(0, epoch) ;
+      leg = {} ;
+      for f = {'train', 'val'}
+        f = char(f) ;
+        if isfield(stats.(f), p)
+          tmp = [stats.(f).(p)] ;
+          values(end+1,:) = tmp(1,:)' ;
+          leg{end+1} = f ;
+        end
+      end
+      subplot(1,numel(plots),find(strcmp(p,plots))) ;
+      plot(1:epoch, values','o-') ;
+      xlabel('epoch') ;
+      title(p) ;
+      legend(leg{:}) ;
+      grid on ;
+    end
+    drawnow ;
+    print(1, modelFigPath, '-dpdf') ;
+  end
+end
+
+if ( opts.computeBNMoment == true )
+  % Revert it back
+  for i = 1:numel(net.layers)
+    if ( isa( net.layers(i).block, 'dagnn.BatchNorm') )
+      net.layers(i).block.computeMoment = false;
+    end
+  end
+end
+
+% -------------------------------------------------------------------------
+function [stats, prof] = process_epoch(net, state, opts, mode)
+% -------------------------------------------------------------------------
+
+% initialize empty momentum
+if strcmp(mode,'train')
+  state.momentum = num2cell(zeros(1, numel(net.params))) ;
+end
+
+% move CNN  to GPU as needed
+numGpus = numel(opts.gpus) ;
+if numGpus >= 1
+  net.move('gpu') ;
+  if strcmp(mode,'train')
+    state.momentum = cellfun(@gpuArray,state.momentum,'UniformOutput',false) ;
+  end
+end
+if numGpus > 1
+  mmap = map_gradients(opts.memoryMapFile, net, numGpus) ;
+else
+  mmap = [] ;
+end
+
+% profile
+if opts.profile
+  if numGpus <= 1
+    profile clear ;
+    profile on ;
+  else
+    mpiprofile reset ;
+    mpiprofile on ;
+  end
+end
+
+subset = state.(mode) ;
+num = 0 ;
+stats.num = 0 ; % return something even if subset = []
+stats.time = 0 ;
+adjustTime = 0 ;
+
+start = tic ;
+for t=1:opts.batchSize:numel(subset)
+  fprintf('%s: epoch %02d: %3d/%3d:', mode, state.epoch, ...
+          fix((t-1)/opts.batchSize)+1, ceil(numel(subset)/opts.batchSize)) ;
+  batchSize = min(opts.batchSize, numel(subset) - t + 1) ;
+
+  for s=1:opts.numSubBatches
+    % get this image batch and prefetch the next
+    batchStart = t + (labindex-1) + (s-1) * numlabs ;
+    batchEnd = min(t+opts.batchSize-1, numel(subset)) ;
+    batch = subset(batchStart : opts.numSubBatches * numlabs : batchEnd) ;
+    num = num + numel(batch) ;
+    if numel(batch) == 0, continue ; end
+
+    inputs = state.getBatch(state.imdb, batch) ;
+
+    if opts.prefetch
+      if s == opts.numSubBatches
+        batchStart = t + (labindex-1) + opts.batchSize ;
+        batchEnd = min(t+2*opts.batchSize-1, numel(subset)) ;
+      else
+        batchStart = batchStart + numlabs ;
+      end
+      nextBatch = subset(batchStart : opts.numSubBatches * numlabs : batchEnd) ;
+      state.getBatch(state.imdb, nextBatch) ;
+    end
+
+    if strcmp(mode, 'train')
+      net.mode = 'normal' ;
+      net.accumulateParamDers = (s ~= 1) ;
+      net.eval(inputs, opts.derOutputs) ;
+    else
+      net.mode = 'test' ;
+      net.eval(inputs) ;
+    end
+  end
+
+  % accumulate gradient
+  if strcmp(mode, 'train')
+    if ~isempty(mmap)
+      write_gradients(mmap, net) ;
+      labBarrier() ;
+    end
+    state = accumulate_gradients(state, net, opts, batchSize, mmap) ;
+  end
+
+  % get statistics
+  time = toc(start) + adjustTime ;
+  batchTime = time - stats.time ;
+  stats = opts.extractStatsFn(net) ;
+  stats.num = num ;
+  stats.time = time ;
+  currentSpeed = batchSize / batchTime ;
+  averageSpeed = (t + batchSize - 1) / time ;
+  if t == opts.batchSize + 1
+    % compensate for the first iteration, which is an outlier
+    adjustTime = 2*batchTime - time ;
+    stats.time = time + adjustTime ;
+  end
+
+  fprintf(' %.1f (%.1f) Hz', averageSpeed, currentSpeed) ;
+  for f = setdiff(fieldnames(stats)', {'num', 'time'})
+    f = char(f) ;
+    fprintf(' %s:', f) ;
+    fprintf(' %.3f', stats.(f)) ;
+  end
+  fprintf('\n') ;
+end
+
+if ~isempty(mmap)
+  unmap_gradients(mmap) ;
+end
+
+if opts.profile
+  if numGpus <= 1
+    prof = profile('info') ;
+    profile off ;
+  else
+    prof = mpiprofile('info');
+    mpiprofile off ;
+  end
+else
+  prof = [] ;
+end
+
+net.reset() ;
+net.move('cpu') ;
+
+% -------------------------------------------------------------------------
+function state = accumulate_gradients(state, net, opts, batchSize, mmap)
+% -------------------------------------------------------------------------
+numGpus = numel(opts.gpus) ;
+otherGpus = setdiff(1:numGpus, labindex) ;
+
+for p=1:numel(net.params)
+
+  % accumualte gradients from multiple labs (GPUs) if needed
+  if numGpus > 1
+    tag = net.params(p).name ;
+    for g = otherGpus
+      tmp = gpuArray(mmap.Data(g).(tag)) ;
+      net.params(p).der = net.params(p).der + tmp ;
+    end
+  end
+
+  switch net.params(p).trainMethod
+
+    case 'average' % mainly for batch normalization
+      thisLR = net.params(p).learningRate ;
+      net.params(p).value = ...
+          (1 - thisLR) * net.params(p).value + ...
+          (thisLR/batchSize/net.params(p).fanout) * net.params(p).der ;
+
+    case 'gradient'
+      thisDecay = opts.weightDecay * net.params(p).weightDecay ;
+      thisLR = state.learningRate * net.params(p).learningRate ;
+      state.momentum{p} = opts.momentum * state.momentum{p} ...
+        - thisDecay * net.params(p).value ...
+        - (1 / batchSize) * net.params(p).der ;
+      net.params(p).value = net.params(p).value + thisLR * state.momentum{p} ;
+
+    case 'otherwise'
+      error('Unknown training method ''%s'' for parameter ''%s''.', ...
+        net.params(p).trainMethod, ...
+        net.params(p).name) ;
+  end
+end
+
+% -------------------------------------------------------------------------
+function mmap = map_gradients(fname, net, numGpus)
+% -------------------------------------------------------------------------
+format = {} ;
+for i=1:numel(net.params)
+  format(end+1,1:3) = {'single', size(net.params(i).value), net.params(i).name} ;
+end
+format(end+1,1:3) = {'double', [3 1], 'errors'} ;
+if ~exist(fname) && (labindex == 1)
+  f = fopen(fname,'wb') ;
+  for g=1:numGpus
+    for i=1:size(format,1)
+      fwrite(f,zeros(format{i,2},format{i,1}),format{i,1}) ;
+    end
+  end
+  fclose(f) ;
+end
+labBarrier() ;
+mmap = memmapfile(fname, ...
+                  'Format', format, ...
+                  'Repeat', numGpus, ...
+                  'Writable', true) ;
+
+% -------------------------------------------------------------------------
+function write_gradients(mmap, net)
+% -------------------------------------------------------------------------
+for i=1:numel(net.params)
+  mmap.Data(labindex).(net.params(i).name) = gather(net.params(i).der) ;
+end
+
+% -------------------------------------------------------------------------
+function unmap_gradients(mmap)
+% -------------------------------------------------------------------------
+
+% -------------------------------------------------------------------------
+function stats = accumulateStats(stats_)
+% -------------------------------------------------------------------------
+
+for s = {'train', 'val'}
+  s = char(s) ;
+  total = 0 ;
+
+  % initialize stats stucture with same fields and same order as
+  % stats_{1}
+  stats__ = stats_{1} ;
+  names = fieldnames(stats__.(s))' ;
+  values = zeros(1, numel(names)) ;
+  fields = cat(1, names, num2cell(values)) ;
+  stats.(s) = struct(fields{:}) ;
+
+  for g = 1:numel(stats_)
+    stats__ = stats_{g} ;
+    num__ = stats__.(s).num ;
+    total = total + num__ ;
+
+    for f = setdiff(fieldnames(stats__.(s))', 'num')
+      f = char(f) ;
+      stats.(s).(f) = stats.(s).(f) + stats__.(s).(f) * num__ ;
+
+      if g == numel(stats_)
+        stats.(s).(f) = stats.(s).(f) / total ;
+      end
+    end
+  end
+  stats.(s).num = total ;
+end
+
+% -------------------------------------------------------------------------
+function stats = extractStats(net)
+% -------------------------------------------------------------------------
+sel = find(cellfun(@(x) isa(x,'dagnn.Loss'), {net.layers.block})) ;
+stats = struct() ;
+for i = 1:numel(sel)
+  stats.(net.layers(sel(i)).outputs{1}) = net.layers(sel(i)).block.average ;
+end
+
+% -------------------------------------------------------------------------
+function saveState(fileName, net, stats)
+% -------------------------------------------------------------------------
+net_ = net ;
+net = net_.saveobj() ;
+save(fileName, 'net', 'stats') ;
+
+% -------------------------------------------------------------------------
+function [net, stats] = loadState(fileName)
+% -------------------------------------------------------------------------
+load(fileName, 'net', 'stats') ;
+net = dagnn.DagNN.loadobj(net) ;
+
+% -------------------------------------------------------------------------
+function epoch = findLastCheckpoint(modelDir)
+% -------------------------------------------------------------------------
+list = dir(fullfile(modelDir, 'net-epoch-*.mat')) ;
+tokens = regexp({list.name}, 'net-epoch-([\d]+).mat', 'tokens') ;
+epoch = cellfun(@(x) sscanf(x{1}{1}, '%d'), tokens) ;
+epoch = max([epoch 0]) ;
+
+% -------------------------------------------------------------------------
+function switchFigure(n)
+% -------------------------------------------------------------------------
+if get(0,'CurrentFigure') ~= n
+  try
+    set(0,'CurrentFigure',n) ;
+  catch
+    figure(n) ;
+  end
+end
+
+% -------------------------------------------------------------------------
+function prepareGPUs(opts, cold)
+% -------------------------------------------------------------------------
+numGpus = numel(opts.gpus) ;
+if numGpus > 1
+  % check parallel pool integrity as it could have timed out
+  pool = gcp('nocreate') ;
+  if ~isempty(pool) && pool.NumWorkers ~= numGpus
+    delete(pool) ;
+  end
+  pool = gcp('nocreate') ;
+  if isempty(pool)
+    parpool('local', numGpus) ;
+    cold = true ;
+  end
+  if exist(opts.memoryMapFile)
+    delete(opts.memoryMapFile) ;
+  end
+
+end
+if numGpus >= 1 && cold
+  fprintf('%s: resetting GPU\n', mfilename)
+  if numGpus == 1
+    gpuDevice(opts.gpus)
+  else
+    spmd, gpuDevice(opts.gpus(labindex)), end
+  end
+end
+
+%end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/+dagnn/Abs.m

@@ -0,0 +1,12 @@
+classdef Abs < dagnn.ElementWise
+  methods
+    function outputs = forward(obj, inputs, params)
+      outputs{1} = vl_nnabs(inputs{1}) ;
+    end
+
+    function [derInputs, derParams] = backward(obj, inputs, params, derOutputs)
+      derInputs{1} = vl_nnabs(inputs{1}, derOutputs{1}) ;
+      derParams = {} ;
+    end
+  end
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/+dagnn/BatchNorm.m

@@ -0,0 +1,60 @@
+classdef BatchNorm < dagnn.ElementWise
+  properties
+    numChannels
+    epsilon = 1e-4
+    computeMoment = false;
+  end
+ 
+  properties (Transient)
+    moments
+  end
+  
+  methods
+    function outputs = forward(obj, inputs, params)
+      if strcmp(obj.net.mode, 'test')
+        if( obj.computeMoment )         
+          [outputs{1}, obj.moments] = vl_nnbnorm(inputs{1}, params{1}, ...
+                                    params{2}, 'epsilon', obj.epsilon) ;
+        else
+          outputs{1} = vl_nnbnorm(inputs{1}, params{1}, params{2}, ...
+                                  'moments', params{3}, ...
+                                  'epsilon', obj.epsilon) ;
+          obj.moments = [];
+        end
+           
+      else
+        [outputs{1}, obj.moments] = vl_nnbnorm(inputs{1}, params{1}, ...
+                                   params{2}, 'epsilon', obj.epsilon) ;
+      end
+    end
+
+    function [derInputs, derParams] = backward(obj, inputs, params, derOutputs)
+      [derInputs{1}, derParams{1}, derParams{2}, derParams{3}] = ...
+        vl_nnbnorm(inputs{1}, params{1}, params{2}, derOutputs{1}, ...
+                   'epsilon', obj.epsilon) ;
+      obj.moments = [];
+      % multiply the moments update by the number of images in the batch
+      % this is required to make the update additive for subbatches
+      % and will eventually be normalized away
+      derParams{3} = derParams{3} * size(inputs{1},4) ;
+    end
+
+    % ---------------------------------------------------------------------
+    function obj = BatchNorm(varargin)
+      obj.load(varargin{:}) ;
+    end
+
+    function params = initParams(obj)
+      params{1} = ones(obj.numChannels,1,'single') ;
+      params{2} = zeros(obj.numChannels,1,'single') ;
+      params{3} = zeros(obj.numChannels,2,'single') ;
+    end
+
+    function attach(obj, net, index)
+      attach@dagnn.ElementWise(obj, net, index) ;
+      p = net.getParamIndex(net.layers(index).params{3}) ;
+      net.params(p).trainMethod = 'average' ;
+      net.params(p).learningRate = 0.01 ;
+    end
+  end
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/+dagnn/PhaseSplit.m

@@ -0,0 +1,36 @@
+classdef PhaseSplit < dagnn.Filter
+  % Construct PhaseSplit in a way similar to Pooling, mightbe we could 
+  % do it in a better and clean way. 
+  properties
+    poolSize = [1 1]
+  end
+
+  methods
+    function outputs = forward(self, inputs, params)
+      outputs{1} = vl_nnphasesplit( inputs{1} ) ;
+    end
+
+    function [derInputs, derParams] = backward(self, inputs, params, derOutputs)
+      derInputs{1} = vl_nnphasesplit( inputs{1}, derOutputs{1} ) ;
+      derParams = {} ;
+    end
+
+    function kernelSize = getKernelSize(obj)
+      kernelSize = obj.poolSize ;
+    end
+
+    function outputSizes = getOutputSizes(obj, inputSizes)
+      %outputSizes = getOutputSizes@dagnn.Filter(obj, inputSizes) ;
+      outputSizes{1}(1) = inputSizes{1}(1)/8 ;
+      outputSizes{1}(2) = inputSizes{1}(2)/8;
+      outputSizes{1}(3) = inputSizes{1}(3)*64;
+      outputSizes{1}(4) = inputSizes{1}(4);
+    end
+
+    function obj = PhaseSplit(varargin)
+      %obj.load(varargin) ;
+      obj.pad = [0 0 0 0];
+      obj.stride = [8 8];
+    end
+  end
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/+dagnn/TanH.m

@@ -0,0 +1,12 @@
+classdef TanH < dagnn.ElementWise
+  methods
+    function outputs = forward(obj, inputs, params)
+      outputs{1} = vl_nntanh(inputs{1}) ;
+    end
+
+    function [derInputs, derParams] = backward(obj, inputs, params, derOutputs)
+      derInputs{1} = vl_nntanh(inputs{1}, derOutputs{1}) ;
+      derParams = {} ;
+    end
+  end
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/+dagnn/fromSimpleNN.m

@@ -0,0 +1,236 @@
+function obj = fromSimpleNN(net, varargin)
+% FROMSIMPLENN  Initialize a DagNN object from a SimpleNN network
+%   FROMSIMPLENN(NET) initializes the DagNN object from the
+%   specified CNN using the SimpleNN format.
+%
+%   SimpleNN objects are linear chains of computational layers. These
+%   layers exchange information through variables and parameters that
+%   are not explicitly named. Hence, FROMSIMPLENN() uses a number of
+%   rules to assign such names automatically:
+%
+%   * From the input to the output of the CNN, variables are called
+%     `x0` (input of the first layer), `x1`, `x2`, .... In this
+%     manner `xi` is the output of the i-th layer.
+%
+%   * Any loss layer requires two inputs, the second being a label.
+%     These are called `label` (for the first such layers), and then
+%     `label2`, `label3`,... for any other similar layer.
+%
+%   Additionally, given the option `CanonicalNames` the function can 
+%   change the names of some variables to make them more convenient to
+%   use. With this option turned on:
+%
+%   * The network input is called `input` instead of `x0`.
+%
+%   * The output of each SoftMax layer is called `prob` (or `prob2`,
+%     ...).
+%
+%   * The output of each Loss layer is called `objective` (or `
+%     objective2`, ...).
+%
+%   * The input of each SoftMax or Loss layer of type *softmax log
+%     loss* is called `prediction` (or `prediction2`, ...). If a Loss
+%     layer immediately follows a SoftMax layer, then the rule above
+%     takes precendence and the input name is not changed.
+%
+%   FROMSIMPLENN(___, 'OPT', VAL, ...) accepts the following options:
+%
+%   `CanonicalNames`:: false
+%      If `true` use the rules above to assign more meaningful
+%      names to some of the variables.
+
+% Copyright (C) 2015 Karel Lenc and Andrea Vedaldi.
+% All rights reserved.
+%
+% This file is part of the VLFeat library and is made available under
+% the terms of the BSD license (see the COPYING file).
+
+opts.canonicalNames = false ;
+opts = vl_argparse(opts, varargin) ;
+
+import dagnn.*
+
+obj = DagNN() ;
+net = vl_simplenn_move(net, 'cpu') ;
+net = vl_simplenn_tidy(net) ;
+
+% copy meta-information as is
+obj.meta = net.meta ;
+
+for l = 1:numel(net.layers)
+  inputs = {sprintf('x%d',l-1)} ;
+  outputs = {sprintf('x%d',l)} ;
+
+  params = struct(...
+        'name', {}, ...
+        'value', {}, ...
+        'learningRate', [], ...
+        'weightDecay', []) ;
+  if isfield(net.layers{l}, 'name')
+    name = net.layers{l}.name ;
+  else
+    name = sprintf('layer%d',l) ;
+  end
+
+  switch net.layers{l}.type
+    case {'conv', 'convt'}
+      sz = size(net.layers{l}.weights{1}) ;
+      hasBias = ~isempty(net.layers{l}.weights{2}) ;
+      params(1).name = sprintf('%sf',name) ;
+      params(1).value = net.layers{l}.weights{1} ;
+      if hasBias
+        params(2).name = sprintf('%sb',name) ;
+        params(2).value = net.layers{l}.weights{2} ;
+      end
+      if isfield(net.layers{l},'learningRate')
+        params(1).learningRate = net.layers{l}.learningRate(1) ;
+        if hasBias
+          params(2).learningRate = net.layers{l}.learningRate(2) ;
+        end
+      end
+      if isfield(net.layers{l},'weightDecay')
+        params(1).weightDecay = net.layers{l}.weightDecay(1) ;
+        if hasBias
+          params(2).weightDecay = net.layers{l}.weightDecay(2) ;
+        end
+      end
+      switch net.layers{l}.type
+        case 'conv'
+          block = Conv() ;
+          block.size = sz ;
+          block.pad = net.layers{l}.pad ;
+          block.stride = net.layers{l}.stride ;
+        case 'convt'
+          block = ConvTranspose() ;
+          block.size = sz ;
+          block.upsample = net.layers{l}.upsample ;
+          block.crop = net.layers{l}.crop ;
+          block.numGroups = net.layers{l}.numGroups ;
+      end
+      block.hasBias = hasBias ;
+      block.opts = net.layers{l}.opts ;
+
+    case 'pool'
+      block = Pooling() ;
+      block.method = net.layers{l}.method ;
+      block.poolSize = net.layers{l}.pool ;
+      block.pad = net.layers{l}.pad ;
+      block.stride = net.layers{l}.stride ;
+      block.opts = net.layers{l}.opts ;
+
+    case 'phasesplit'
+      block = PhaseSplit();
+      
+    case {'normalize', 'lrn'}
+      block = LRN() ;
+      block.param = net.layers{l}.param ;
+
+    case {'dropout'}
+      block = DropOut() ;
+      block.rate = net.layers{l}.rate ;
+
+    case {'relu'}
+      block = ReLU() ;
+      block.leak = net.layers{l}.leak ;
+
+    case {'sigmoid'}
+      block = Sigmoid() ;
+      
+    case {'abs'}
+      block = Abs();
+      
+    case {'tanh'}
+      block = TanH();
+        
+    case {'tlu'}
+      block = TLU();  
+
+    case {'softmax'}
+      block = SoftMax() ;
+
+    case {'softmaxloss'}
+      block = Loss('loss', 'softmaxlog') ;
+      % The loss has two inputs
+      inputs{2} = getNewVarName(obj, 'label') ;
+        
+    case {'l2'}
+      block = Loss('loss', 'l2') ;
+      % The loss has two inputs
+      inputs{2} = getNewVarName(obj, 'label') ;
+
+    case {'bnorm'}
+      block = BatchNorm() ;
+      params(1).name = sprintf('%sm',name) ;
+      params(1).value = net.layers{l}.weights{1} ;
+      params(2).name = sprintf('%sb',name) ;
+      params(2).value = net.layers{l}.weights{2} ;
+      params(3).name = sprintf('%sx',name) ;
+      params(3).value = net.layers{l}.weights{3} ;
+      if isfield(net.layers{l},'learningRate')
+        params(1).learningRate = net.layers{l}.learningRate(1) ;
+        params(2).learningRate = net.layers{l}.learningRate(2) ;
+        params(3).learningRate = net.layers{l}.learningRate(3) ;
+      end
+      if isfield(net.layers{l},'weightDecay')
+        params(1).weightDecay = net.layers{l}.weightDecay(1) ;
+        params(2).weightDecay = net.layers{l}.weightDecay(2) ;
+        params(3).weightDecay = 0 ;
+      end
+
+    otherwise
+      error([net.layers{l}.type ' is unsupported']) ;
+  end
+
+  obj.addLayer(...
+    name, ...
+    block, ...
+    inputs, ...
+    outputs, ...
+    {params.name}) ;
+
+  for p = 1:numel(params)
+    pindex = obj.getParamIndex(params(p).name) ;
+    if ~isempty(params(p).value)
+      obj.params(pindex).value = params(p).value ;
+    end
+    if ~isempty(params(p).learningRate)
+      obj.params(pindex).learningRate = params(p).learningRate ;
+    end
+    if ~isempty(params(p).weightDecay)
+      obj.params(pindex).weightDecay = params(p).weightDecay ;
+    end
+  end
+end
+
+% --------------------------------------------------------------------
+% Rename variables to canonical names
+% --------------------------------------------------------------------
+
+if opts.canonicalNames
+  for l = 1:numel(obj.layers)
+    if l == 1
+      obj.renameVar(obj.layers(l).inputs{1}, 'input') ;
+    end
+    if isa(obj.layers(l).block, 'dagnn.SoftMax')
+      obj.renameVar(obj.layers(l).outputs{1}, getNewVarName(obj, 'prob')) ;
+      obj.renameVar(obj.layers(l).inputs{1}, getNewVarName(obj, 'prediction')) ;
+    end
+    if isa(obj.layers(l).block, 'dagnn.Loss') %|| isa(obj.layers(l).block, 'dagnn.L2Dist')
+      obj.renameVar(obj.layers(l).outputs{1}, 'objective') ;
+      if isempty(regexp(obj.layers(l).inputs{1}, '^prob.*'))
+        obj.renameVar(obj.layers(l).inputs{1}, ...
+                      getNewVarName(obj, 'prediction')) ;
+      end
+    end
+  end
+end
+
+% --------------------------------------------------------------------
+function name = getNewVarName(obj, prefix)
+% --------------------------------------------------------------------
+t = 0 ;
+name = prefix ;
+while any(strcmp(name, {obj.vars.name}))
+  t = t + 1 ;
+  name = sprintf('%s%d', prefix, t) ;
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/vl_nnabs.m

@@ -0,0 +1,19 @@
+function out = vl_nnabs(x,dzdy)
+%VL_NNABS CNN ABS unit.
+%   Y = VL_NNABS(X) computes the absolute value of the data X. X can
+%   have an arbitrary size. The abs is defined as follows:
+%
+%     ABS(X) = |X|.
+%
+%   DZDX = VL_NNABS(X, DZDY) computes the derivative of the
+%   block projected onto DZDY. DZDX and DZDY have the same
+%   dimensions as X and Y respectively.
+
+%   Note, MATLAB built-in function ABS() and SIGN() are used because their
+%   support for gpuArray 
+
+if nargin <= 1 || isempty(dzdy)
+  out = abs( x ) ;
+else
+  out = dzdy .* sign( x );
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/vl_nnphasesplit.m

@@ -0,0 +1,58 @@
+function y = vl_nnphasesplit( x, dzdy )
+%VL_NNPHASESPLIT CNN phase split the feature plane into 8x8 = 64 DCT mode.
+%   Y = VL_NNCROP(X, STRIDE) phase split the input X into 64 DCT phase mode. 
+%
+%   DZDX = VL_NNCROP(X, DZDY) computes the derivative DZDX of the
+%   function projected on the output derivative DZDY. DZDX has the same
+%   dimension as X and DZDY the same dimension as Y.
+%
+
+% dimension must be divided by 8
+assert( rem(size(x,1), 8 ) == 0 & rem( size(x,2), 8) == 0 );
+
+% Initialize some parameters
+inputSize  = [size(x,1) size(x,2) size(x,3) size(x,4)] ;
+outputSize = [size(x,1)/8, size(x,2)/8, 64*size(x,3), size(x,4)];
+
+% zig zag order
+zzag = zeros(64, 4);
+idx = 1;
+startCh = 1;
+for i = 0:7
+  for j = 0:7    
+    stopCh = startCh + inputSize(3);
+    zzag(idx, :) = [ i, j, startCh, stopCh - 1 ];
+    idx = idx + 1;
+    startCh = stopCh;
+  end
+end
+
+% sampling array
+sy = 1:8:inputSize(1); 
+sx = 1:8:inputSize(2);
+  
+if nargin <= 1 || isempty(dzdy)  
+  % forward function
+  if isa( x, 'gpuArray' )
+    y = gpuArray.zeros(outputSize, classUnderlying(x)) ;
+  else
+    y = zeros(outputSize, 'like', x ) ;
+  end 
+ 
+  for i = 1:64
+    y(:,:,zzag(i,3):zzag(i,4),:) = x(sy + zzag(i,1), sx + zzag(i,2), :, : );   
+  end
+  
+else
+  % backward function
+  if isa(dzdy, 'gpuArray')
+    y = gpuArray.zeros(inputSize, classUnderlying(dzdy)) ;
+  else
+    y = zeros(inputSize, 'like', x) ;
+  end
+ 
+  for i = 1:64
+    y(sy + zzag(i,1), sx + zzag(i,2), :, : ) = dzdy(:,:,zzag(i,3):zzag(i,4),:);   
+  end
+  
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/vl_nntanh.m

@@ -0,0 +1,21 @@
+function out = vl_nntanh(x,dzdy)
+%VL_NNTANH CNN TanH hyperbolic non-linearity
+%   Y = VL_NNTANH(X) computes the hyperbolic tangent non-linearity of the
+%   data X. X can have an arbitrary size. The tanh is defined as follows:
+%
+%     TANH(X) = (EXP(2X) - 1 )/( EXP(2x) + 1 ).
+%
+%   DZDX = VL_NNTANH(X, DZDY) computes the derivative of the
+%   block projected onto DZDY. DZDX and DZDY have the same
+%   dimensions as X and Y respectively.
+%
+%   NOTE: Matlab build-in function TANH() is used since it has extended
+%   support for gpuArray
+
+y = tanh( x );
+
+if nargin <= 1 || isempty(dzdy)
+  out = y;
+else
+  out = dzdy .* ( 1 - y.*y );
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/xtest/suite/nnabs.m

@@ -0,0 +1,36 @@
+classdef nnabs < nntest
+  properties
+    x
+    delta
+  end
+
+  methods (TestClassSetup)
+    function data(test,device)
+      % make sure that all elements in x are differentiable. in this way,
+      % we can compute numerical derivatives reliably by adding a delta < .5.
+      delta = 0.01;      
+      test.range = 10 ;
+      x = test.randn(15,14,3,2) ;
+      
+      ind = find(( x < 0 )&( x > -2*delta));
+      if (~isempty(ind))
+        x(ind) = -2 + rand([1, length(ind)], 'like', x);
+      end
+      
+      test.x = x ;
+      test.delta = delta;
+
+      if strcmp(device,'gpu'), test.x = gpuArray(test.x) ; end
+    end
+  end
+
+  methods (Test)
+    function basic(test)
+      x = test.x ;
+      y = vl_nnabs(x) ;
+      dzdy = test.randn(size(y)) ;
+      dzdx = vl_nnabs(x,dzdy) ;
+      test.der(@(x) vl_nnabs(x), x, dzdy, dzdx, 1e-2) ;
+    end
+  end
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/xtest/suite/nnphasesplit.m

@@ -0,0 +1,23 @@
+classdef nnphasesplit < nntest
+  properties
+    x
+  end
+
+  methods (TestClassSetup)
+    function data(test,device)
+      test.range = 10 ;
+      test.x = test.randn(32,32,4,2) ;
+      if strcmp(device,'gpu'), test.x = gpuArray(test.x) ; end
+    end
+  end
+
+  methods (Test)
+    function basic(test)
+      x = test.x ;
+      y = vl_nnphasesplit(x) ;
+      dzdy = test.randn(size(y)) ;
+      dzdx = vl_nnphasesplit(x,dzdy) ;
+      test.der(@(x) vl_nnphasesplit(x), x, dzdy, dzdx, 1e-3) ;
+    end
+  end
+end

PhaseAwareNet_SRC/MatConvNet/matconvnet-1.0-beta20/matlab/xtest/suite/nntanh.m

@@ -0,0 +1,24 @@
+classdef nntanh < nntest
+  properties
+    x
+    delta
+  end
+
+  methods (TestClassSetup)
+    function data(test,device)
+      test.range = 10 ;
+      test.x = test.randn(15,14,3,2) ;
+      if strcmp(device,'gpu'), test.x = gpuArray(test.x) ; end
+    end
+  end
+
+  methods (Test)
+    function basic(test)
+      x = test.x ;
+      y = vl_nntanh(x) ;
+      dzdy = test.randn(size(y)) ;
+      dzdx = vl_nntanh(x,dzdy) ;
+      test.der(@(x) vl_nntanh(x), x, dzdy, dzdx, 1e-2) ;
+    end
+  end
+end

README.md

@@ -1,3 +1,134 @@
-# Steganalysis
+# Steganography
 
-Python 实现LSB算法进行信息隐藏 包含空域与变换域 JPEG信息隐藏算法 对PDF文件进行信息隐藏 基于卷积神经网络的隐写分析 Matlab SRM、SCA隐写分析
+# 空域编码图像
+
+* 空域编码是指在图像空间域进行编码，也就是直接针对图像像素进行编码
+* 对像素进行编码，如 LSB 算法，主要有下面两种方式
+  * 光栅格式
+  * 调色板格式   GIF(graphics interchange format)
+* 一个图像编码标准往往包括多类编码方法，一个图像仅仅是其一类方法的实例。例如，常见的 BMP（Bitmap）、 TIFF（
+  Tagged Image File Format）、 PNG（Portable Network
+  Graphics）均支持光栅格式与调色板格式编码，对这两种格式
+  编码分别又支持多种具体编码方法
+
+## LSB 隐写算法
+
+* LSB 隐写是最基础、最简单的隐写方法，具有容量大、嵌入速度快、对载体图像质量影响小的特点
+* LSB 的大意就是最低比特位隐写。我们将深度为 8 的 BMP 图像，分为 8 个二值平面（位平面），我们将待嵌入的信息（info）直接写到最低的位平面上。换句话说，如果秘密信息与最低比特位相同，则不改动；如果秘密信息与最低比特位不同，则使用秘密信息值代替最低比特位
+
+[代码实现](/LSB)
+
+![](https://www.writebug.com/myres/static/uploads/2021/12/30/d2a334c6057be058e3bdaa79efb202fb.writebug)
+嵌入信息前的载体图片
+
+![](https://www.writebug.com/myres/static/uploads/2021/12/30/5ef450e6b4aa705dfab9eaeffb47091f.writebug)
+嵌入信息后的载体图片
+
+# 变换域编码图像
+
+## JPEG
+
+* Joint Photographic Experts Group（联合图像专家小组）的缩写
+* JPEG 编码
+  ![](https://www.writebug.com/myres/static/uploads/2021/12/30/e251af7a91f2675226c55b1f2dc29186.writebug)
+
+### JSteg 隐写
+
+* JSteg 的算法的主要思想是将秘密消息嵌入在量化后的 DCT 系数的最低比特位上，但对原始值为 0、+1、-1 的 DCT 系数不进行嵌入，提取秘密消息时，只需将载密图像中不等于 0、l 的量化 DCT 系数的 LSB 取出即可
+* JSteg 算法步骤
+
+1. 选择载体图像，并且将载体图像划分为连续的 8×8 的子块。
+2. 对每个子块使用离散余弦变换之后，用相应的质量因数的量化表量化，得到对应的 8×8 量化 DCT 子块。
+3. 将需要隐藏的信息编码为二进制数据流，对 DCT 子块系数进行 Z 字形扫描，并且使用秘密信息的二进制流替换非 0 和非 1 的 DCT 系数的最低比特位。
+4. 进行熵编码等，产生 JPEG 隐密图像。
+
+* JSteg 的具体嵌入过程
+
+1. 部分解码 JPEG 图像，得到二进制存储的 AC 系数，判断该 AC 系数是否等于正负 1 或 0，若等于则跳过该 AC 系数，否则，执行下一步
+2. 判断二进制存储的 AC 系数的 LSB 是否与要嵌入的秘密信息比特相同，若相同，则不对其进行修改，否则执行下一步
+3. 用秘密信息比特替换二进制存储的 AC 系数的 LSB，将修改后的 AC 系数重新编码得到隐秘 JPEG 图像
+
+* JSteg 不使用 0、1 的原因
+
+1. DCT 系数中“0”的比例最大（一般可达到 60% 以上，取决于图像质量和压缩因子），压缩编码是利用大量出现连零实现的，如果改变 DCT 系数中“0”的话，不能很好的实现压缩
+2. DCT 系数中的“1”若变成“0”，由于接受端无法区分未使用的“0”和嵌入消息后得到的“0”，从而无法实现秘密信息的提取
+
+[代码实现](Jsteg.py)
+
+### F3 隐写
+
+* 为了改善大量 DCT 系数不隐藏信息这一状况，人们提出了 F3 隐写
+* F3 对原始值为 +1 和-1 的 DCT 系数，进行了利用。F3 隐写的规则如下
+
+1. 每个非 0 的 DCT 数据用于隐藏 1 比特秘密信息，为 0 的 DCT 系数不负载秘密信息
+2. 如果秘密信息与 DCT 的 LSB 相同，便不作改动；如果不同，将 DCT 系数的绝对值减小 1，符号不变
+3. 当原始值为 +1 或-1 且预嵌入秘密信息为 0 时，将这个位置归 0 并视为无效，在下一个 DCT 系数上重新嵌入
+
+* 编写代码实现嵌入，并观察 DCT 系数变化
+  [代码实现](F3.py)
+
+```
+JPEG的DCT系数
+{0: 32939, 1: 15730, 2: 13427, 3: 11523, 4: 9540, 5: 7957, 6: 6607, 7: 5697, 8: 4834, -1: 15294, -2: 13637, -3: 11479, -4: 9683, -5: 7979, -6: 6878, -7: 5631, -8: 4871}
+Jsteg begin writing!
+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+经过信息隐藏后JPEG的DCT系数变化
+{0: 32939, 1: 15730, 2: 12552, 3: 12398, 4: 8739, 5: 8758, 6: 6165, 7: 6139, 8: 4487, -1: 15294, -2: 12721, -3: 12395, -4: 8891, -5: 8771, -6: 6319, -7: 6190, -8: 4463}
+F3steg begin writing!
+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+经过信息隐藏后JPEG的DCT系数变化
+{0: 47068, 1: 13416, 2: 13519, 3: 10075, 4: 9545, 5: 7077, 6: 6650, 7: 5016, 8: 4754, -1: 13308, -2: 13668, -3: 10124, -4: 9571, -5: 7249, -6: 6591, -7: 5098, -8: 4733}
+F4steg begin writing!
+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+经过信息隐藏后JPEG的DCT系数变化
+{0: 59320, 1: 13618, 2: 11987, 3: 9875, 4: 8328, 5: 6860, 6: 5883, 7: 4910, 8: 4239, -1: 13692, -2: 11976, -3: 9976, -4: 8428, -5: 7007, -6: 5834, -7: 4964, -8: 4190}
+```
+
+* 条形图绘制
+
+![](https://www.writebug.com/myres/static/uploads/2021/12/30/7a40002ebbd1e4d6e160bcce7b50f636.writebug)
+
+* 未经过信息隐藏的 DCT 系数，系数近似符合拉普拉斯分布，具有几个典型特点
+  * 对称性 以 0 为中心达到最大值，两侧分布近似对称
+  * 单侧单调性 以 0 值为中心达到最大值，两侧单调下降
+  * 梯度下降性 小值样点较多，大值样点较少，分布曲线在两侧下降梯度逐渐减小
+    ![](https://www.writebug.com/myres/static/uploads/2021/12/30/dd1e5a48b8e006d7456a3ba1f2c4ef35.writebug)
+* JSteg 隐写的 DCT 系数
+  * JSteg 隐写可嵌入信息的 DCT 系数较少，隐写量较小，且相邻数值样点的个数接近，如 2 和 3，-2 和-3 形成了值对，卡方特征变化明显，因而提出了 F3 隐写
+    ![](https://www.writebug.com/myres/static/uploads/2021/12/30/5231d6a6b7690459b0c318d62221b60e.writebug)
+* F3 隐写的 DCT 系数
+  * F3 的设计虽然防止了相邻值出现数量接近的现象，也维持了分布函数的对称性，但使得偶数的分布增加，没有满足单调性
+  * 这是因为载体绝对值为 1 的数值较多，当其被修改为 0 时，嵌入算法继续嵌入直到找到一个偶数值，或者将一个奇数值改为偶数值，这样绝对值为 1 的系数可以支持嵌入 1，但是不支持嵌入 0，需要使用或制造一个偶数
+  * 另外，0 系数的数量有相应的增加，产生分布曲线向 0 收缩的现象
+
+### F4 隐写
+
+* 为了克服 F3 的缺陷，F4 对不同正负号的奇偶系数采用了不同的嵌入与消息表示方法
+* **F4 用负偶数、正奇数代表嵌入了消息比特 1，用负奇数、正偶数代表嵌入了 0**
+* 但仍然通过减小绝对值的方法进行修改，如果减小绝对值后系数为 0 则继续往下嵌入当前比特
+* [代码实现](F4.py)
+  ![](https://www.writebug.com/myres/static/uploads/2021/12/30/cf7f25ee63efd8a6f3f3b0688ca49fe1.writebug)
+* F4 隐写的 DCT 系数
+  * F4 显然保持了载体分布函数的对称性，也保持了载体分布函数的单调性与梯度下降性
+  * 但 F4 依然存在使含密载体分布函数形状向 0 收缩的现象
+
+### F5 隐写
+
+F5 隐写实现了基于汉明码的矩阵编码隐写，在一个分组上最多修改 R=1 次以嵌入 $2^r-1-r$ 比特，采用的基本嵌入方法是基于 F4 隐写的
+
+F5 的嵌入步骤
+
+- 获得嵌入域。若输入的是位图，则进行 JPEG 编码得到 JPEG 系数；若输入的是 JPEG 图像，则进行熵编码的解码得到 JPEG 系数
+- 位置置乱。根据口令生成的密钥位一个伪随机数发生器，基于伪随机数发生器置乱 JPEG 系数的位置
+- 编码参数确定。为了提高嵌入效率，一般希望 n 尽可能大，因此，根据载体中可用系数的数量与消息的长度确定参数 r，并计算$n=2^r-1$
+- 基于（$n=2^r-1,r$）的汉明分组码得到编码校验矩阵，开始嵌入消息：
+  - ① 按置乱后的顺序取下面 n 个非零系数，在其中的 LSB 序列中按照以上编码嵌入 n-r 比特的消息；
+  - ② 如果未发生修改，并且还有需要嵌入的消息，则返回 ① 继续嵌入下一分组；
+  - ③ 如果进行了修改，则判断是不是有系数值收缩到 0，如果没有，并且还有需要嵌入的消息则返回 ① 继续嵌入下一分组，如果有，取出一个新的非零系数组成新的一组 n 个非零系数，在其中的 LSB 序列中按照以上编码重新嵌入以上 n-r 比特的消息，直到没有修改或收缩，最后，如果还有需要嵌入的消息，则返回 ① 继续嵌入下一分组
+- 位置逆置乱。恢复 DCT 系数原来的位置顺序
+- 熵编码。按照 JPEG 标准无损压缩 DCT 量化系数，得到 JPEG 文件
+
+# 参考资料
+
+* 隐写学原理与技术 By 赵险峰
+* 数字媒体中的隐写术 By J.Fridrich

SRNet/SCA_SRNet.py

@@ -0,0 +1,118 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Wed Sep 18 19:59:14 2019
+
+@author: Lee
+"""
+
+import os
+import sys
+os.environ['CUDA_DEVICE_ORDER'] = 'PCI_BUS_ID'
+os.environ['CUDA_VISIBLE_DEVICES'] = '1' # set a GPU (with GPU Number)
+home = os.path.expanduser("~")
+sys.path.append(home + '/tflib/')        # path for 'tflib' folder
+import matplotlib.pyplot as plt
+from scipy.io import loadmat
+from SCA_SRNet_Spatial import *         # use  'SCA_SRNet_JPEG' for JPEG domain
+
+
+def trnGen(cover_path, stego_path, cover_beta_path, stego_beta_path, thread_idx=0, n_threads=1):
+    IL=os.listdir(cover_path)
+    img_shape = plt.imread(cover_path +IL[0]).shape
+    batch = np.empty((2, img_shape[0], img_shape[1], 2), dtype='float32')
+    while True:
+        indx = np.random.permutation(len(IL))
+        for i in indx:
+            batch[0,:,:,0] =  plt.imread(cover_path + IL[i])  # use loadmat for loading JPEG decompressed images 
+            batch[0,:,:,1] =  loadmat(cover_beta_path + IL[i].replace('pgm','mat'))['Beta'] # adjust for JPEG images
+            batch[1,:,:,0] =  plt.imread(stego_path + IL[i])  # use loadmat for loading JPEG decompressed images 
+            batch[1,:,:,1] =  loadmat(stego_beta_path + IL[i].replace('pgm','mat'))['Beta'] # adjust for JPEG images
+            rot = random.randint(0,3)
+            if rand() < 0.5:
+                yield [np.rot90(batch, rot, axes=[1,2]), np.array([0,1], dtype='uint8')]
+            else:
+                yield [np.flip(np.rot90(batch, rot, axes=[1,2]), axis=2), np.array([0,1], dtype='uint8')]   
+                
+
+def valGen(cover_path, stego_path, cover_beta_path, stego_beta_path, thread_idx=0, n_threads=1):
+    IL=os.listdir(cover_path)
+    img_shape = plt.imread(cover_path +IL[0]).shape
+    batch = np.empty((2, img_shape[0], img_shape[1], 2), dtype='float32')
+    while True:
+        for i in range(len(IL)):
+            batch[0,:,:,0] =  plt.imread(cover_path + IL[i])  # use loadmat for loading JPEG decompressed images 
+            batch[0,:,:,1] =  loadmat(cover_beta_path + IL[i].replace('pgm','mat'))['Beta'] # adjust for JPEG images
+            batch[1,:,:,0] =  plt.imread(stego_path + IL[i])  # use loadmat for loading JPEG decompressed images 
+            batch[1,:,:,1] =  loadmat(stego_beta_path + IL[i].replace('pgm','mat'))['Beta'] # adjust for JPEG images
+            yield [batch, np.array([0,1], dtype='uint8') ]
+            
+            
+train_batch_size = 32
+valid_batch_size = 40
+max_iter = 500000
+train_interval=100
+valid_interval=5000
+save_interval=5000
+num_runner_threads=10
+
+# save Betas as '.mat' files with variable name "Beta" and put them in thier corresponding directoroies. Make sure 
+# all mat files in the directories can be loaded in Python without any errors.
+
+TRAIN_COVER_DIR = '/media/Cover_TRN/'
+TRAIN_STEGO_DIR = '/media/Stego_WOW_0.5_TRN/'
+TRAIN_COVER_BETA_DIR =  '/media/Beta_Cover_WOW_0.5_TRN/'
+TRAIN_STEGO_BETA_DIR = '/media/Beta_Stego_WOW_0.5_TRN/'
+
+VALID_COVER_DIR = '/media/Cover_VAL/'
+VALID_STEGO_DIR = '/media/Stego_WOW_0.5_VAL/'
+VALID_COVER_BETA_DIR = '/media/Beta_Cover_WOW_0.5_VAL/'
+VALID_STEGO_BETA_DIR = '/media/Beta_Stego_WOW_0.5_VAL/'
+
+train_gen = partial(trnGen, \
+                    TRAIN_COVER_DIR, TRAIN_STEGO_DIR, TRAIN_COVER_BETA_DIR, TRAIN_STEGO_BETA_DIR) 
+valid_gen = partial(valGen, \
+                    VALID_COVER_DIR, VALID_STEGO_DIR, VALID_COVER_BETA_DIR, VALID_STEGO_BETA_DIR)
+
+LOG_DIR= '/media/LogFiles/SCA_WOW_0.5'  # path for a log direcotry
+# load_path= LOG_DIR + 'Model_460000.ckpt'   # continue training from a specific checkpoint
+load_path=None                               # training from scratch
+
+if not os.path.exists(LOG_DIR):
+    os.makedirs(LOG_DIR)
+    
+train_ds_size = len(glob(TRAIN_COVER_DIR + '/*')) * 2
+valid_ds_size = len(glob(VALID_COVER_DIR +'/*')) * 2
+print 'train_ds_size: %i'%train_ds_size
+print 'valid_ds_size: %i'%valid_ds_size
+
+if valid_ds_size % valid_batch_size != 0:
+    raise ValueError("change batch size for validation")
+
+optimizer = AdamaxOptimizer
+boundaries = [400000]     # learning rate adjustment at iteration 400K
+values = [0.001, 0.0001]  # learning rates
+train(SCA_SRNet, train_gen, valid_gen , train_batch_size, valid_batch_size, valid_ds_size, \
+      optimizer, boundaries, values, train_interval, valid_interval, max_iter,\
+      save_interval, LOG_DIR,num_runner_threads, load_path)
+
+
+# Testing 
+TEST_COVER_DIR = '/media/Cover_TST/'
+TEST_STEGO_DIR = '/media/Stego_WOW_0.5_TST/'
+TEST_COVER_BETA_DIR = '/media/Beta_Cover_WOW_0.5_TST/'
+TEST_STEGO_BETA_DIR = '/media/Beta_Stego_WOW_0.5_TST/'
+
+test_batch_size=40
+LOG_DIR = '/media/LogFiles/SCA_WOW_0.5/' 
+LOAD_DIR = LOG_DIR + 'Model_435000.ckpt'        # loading from a specific checkpoint
+
+test_gen = partial(gen_valid, \
+                    TEST_COVER_DIR, TEST_STEGO_DIR)
+
+test_ds_size = len(glob(TEST_COVER_DIR + '/*')) * 2
+print 'test_ds_size: %i'%test_ds_size
+
+if test_ds_size % test_batch_size != 0:
+    raise ValueError("change batch size for testing!")
+
+test_dataset(SCA_SRNet, test_gen, test_batch_size, test_ds_size, LOAD_DIR)

SRNet/SCA_SRNet_Example.ipynb

@@ -0,0 +1,178 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "import os\n",
+    "import sys\n",
+    "os.environ['CUDA_DEVICE_ORDER'] = 'PCI_BUS_ID'\n",
+    "os.environ['CUDA_VISIBLE_DEVICES'] = '1' # set a GPU (with GPU Number)\n",
+    "home = os.path.expanduser(\"~\")\n",
+    "sys.path.append(home + '/tflib/')        # path for 'tflib' folder\n",
+    "import matplotlib.pyplot as plt\n",
+    "from scipy.io import loadmat\n",
+    "from SCA_SRNet_Spatial import *         # use  'SCA_SRNet_JPEG' for JPEG domain"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "def trnGen(cover_path, stego_path, cover_beta_path, stego_beta_path, thread_idx=0, n_threads=1):\n",
+    "    IL=os.listdir(cover_path)\n",
+    "    img_shape = plt.imread(cover_path +IL[0]).shape\n",
+    "    batch = np.empty((2, img_shape[0], img_shape[1], 2), dtype='float32')\n",
+    "    while True:\n",
+    "        indx = np.random.permutation(len(IL))\n",
+    "        for i in indx:\n",
+    "            batch[0,:,:,0] =  plt.imread(cover_path + IL[i])  # use loadmat for loading JPEG decompressed images \n",
+    "            batch[0,:,:,1] =  loadmat(cover_beta_path + IL[i].replace('pgm','mat'))['Beta'] # adjust for JPEG images\n",
+    "            batch[1,:,:,0] =  plt.imread(stego_path + IL[i])  # use loadmat for loading JPEG decompressed images \n",
+    "            batch[1,:,:,1] =  loadmat(stego_beta_path + IL[i].replace('pgm','mat'))['Beta'] # adjust for JPEG images\n",
+    "            rot = random.randint(0,3)\n",
+    "            if rand() < 0.5:\n",
+    "                yield [np.rot90(batch, rot, axes=[1,2]), np.array([0,1], dtype='uint8')]\n",
+    "            else:\n",
+    "                yield [np.flip(np.rot90(batch, rot, axes=[1,2]), axis=2), np.array([0,1], dtype='uint8')]    "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "def valGen(cover_path, stego_path, cover_beta_path, stego_beta_path, thread_idx=0, n_threads=1):\n",
+    "    IL=os.listdir(cover_path)\n",
+    "    img_shape = plt.imread(cover_path +IL[0]).shape\n",
+    "    batch = np.empty((2, img_shape[0], img_shape[1], 2), dtype='float32')\n",
+    "    while True:\n",
+    "        for i in range(len(IL)):\n",
+    "            batch[0,:,:,0] =  plt.imread(cover_path + IL[i])  # use loadmat for loading JPEG decompressed images \n",
+    "            batch[0,:,:,1] =  loadmat(cover_beta_path + IL[i].replace('pgm','mat'))['Beta'] # adjust for JPEG images\n",
+    "            batch[1,:,:,0] =  plt.imread(stego_path + IL[i])  # use loadmat for loading JPEG decompressed images \n",
+    "            batch[1,:,:,1] =  loadmat(stego_beta_path + IL[i].replace('pgm','mat'))['Beta'] # adjust for JPEG images\n",
+    "            yield [batch, np.array([0,1], dtype='uint8') ]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "train_batch_size = 32\n",
+    "valid_batch_size = 40\n",
+    "max_iter = 500000\n",
+    "train_interval=100\n",
+    "valid_interval=5000\n",
+    "save_interval=5000\n",
+    "num_runner_threads=10\n",
+    "\n",
+    "# save Betas as '.mat' files with variable name \"Beta\" and put them in thier corresponding directoroies. Make sure \n",
+    "# all mat files in the directories can be loaded in Python without any errors.\n",
+    "\n",
+    "TRAIN_COVER_DIR = '/media/Cover_TRN/'\n",
+    "TRAIN_STEGO_DIR = '/media/Stego_WOW_0.5_TRN/'\n",
+    "TRAIN_COVER_BETA_DIR =  '/media/Beta_Cover_WOW_0.5_TRN/'\n",
+    "TRAIN_STEGO_BETA_DIR = '/media/Beta_Stego_WOW_0.5_TRN/'\n",
+    "\n",
+    "VALID_COVER_DIR = '/media/Cover_VAL/'\n",
+    "VALID_STEGO_DIR = '/media/Stego_WOW_0.5_VAL/'\n",
+    "VALID_COVER_BETA_DIR = '/media/Beta_Cover_WOW_0.5_VAL/'\n",
+    "VALID_STEGO_BETA_DIR = '/media/Beta_Stego_WOW_0.5_VAL/'\n",
+    "\n",
+    "train_gen = partial(trnGen, \\\n",
+    "                    TRAIN_COVER_DIR, TRAIN_STEGO_DIR, TRAIN_COVER_BETA_DIR, TRAIN_STEGO_BETA_DIR) \n",
+    "valid_gen = partial(valGen, \\\n",
+    "                    VALID_COVER_DIR, VALID_STEGO_DIR, VALID_COVER_BETA_DIR, VALID_STEGO_BETA_DIR)\n",
+    "\n",
+    "LOG_DIR= '/media/LogFiles/SCA_WOW_0.5'  # path for a log direcotry\n",
+    "# load_path= LOG_DIR + 'Model_460000.ckpt'   # continue training from a specific checkpoint\n",
+    "load_path=None                               # training from scratch\n",
+    "\n",
+    "if not os.path.exists(LOG_DIR):\n",
+    "    os.makedirs(LOG_DIR)\n",
+    "    \n",
+    "train_ds_size = len(glob(TRAIN_COVER_DIR + '/*')) * 2\n",
+    "valid_ds_size = len(glob(VALID_COVER_DIR +'/*')) * 2\n",
+    "print 'train_ds_size: %i'%train_ds_size\n",
+    "print 'valid_ds_size: %i'%valid_ds_size\n",
+    "\n",
+    "if valid_ds_size % valid_batch_size != 0:\n",
+    "    raise ValueError(\"change batch size for validation\")\n",
+    "\n",
+    "optimizer = AdamaxOptimizer\n",
+    "boundaries = [400000]     # learning rate adjustment at iteration 400K\n",
+    "values = [0.001, 0.0001]  # learning rates\n",
+    "train(SCA_SRNet, train_gen, valid_gen , train_batch_size, valid_batch_size, valid_ds_size, \\\n",
+    "      optimizer, boundaries, values, train_interval, valid_interval, max_iter,\\\n",
+    "      save_interval, LOG_DIR,num_runner_threads, load_path)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "# Testing \n",
+    "TEST_COVER_DIR = '/media/Cover_TST/'\n",
+    "TEST_STEGO_DIR = '/media/Stego_WOW_0.5_TST/'\n",
+    "TEST_COVER_BETA_DIR = '/media/Beta_Cover_WOW_0.5_TST/'\n",
+    "TEST_STEGO_BETA_DIR = '/media/Beta_Stego_WOW_0.5_TST/'\n",
+    "\n",
+    "test_batch_size=40\n",
+    "LOG_DIR = '/media/LogFiles/SCA_WOW_0.5/' \n",
+    "LOAD_DIR = LOG_DIR + 'Model_435000.ckpt'        # loading from a specific checkpoint\n",
+    "\n",
+    "test_gen = partial(gen_valid, \\\n",
+    "                    TEST_COVER_DIR, TEST_STEGO_DIR)\n",
+    "\n",
+    "test_ds_size = len(glob(TEST_COVER_DIR + '/*')) * 2\n",
+    "print 'test_ds_size: %i'%test_ds_size\n",
+    "\n",
+    "if test_ds_size % test_batch_size != 0:\n",
+    "    raise ValueError(\"change batch size for testing!\")\n",
+    "\n",
+    "test_dataset(SCA_SRNet, test_gen, test_batch_size, test_ds_size, LOAD_DIR)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.15rc1"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}

SRNet/SRNet_Example.ipynb

@@ -0,0 +1,127 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "import os\n",
+    "import sys\n",
+    "os.environ['CUDA_DEVICE_ORDER'] = 'PCI_BUS_ID'\n",
+    "os.environ['CUDA_VISIBLE_DEVICES'] = '1' # set a GPU (with GPU Number)\n",
+    "home = os.path.expanduser(\"~\")\n",
+    "sys.path.append(home + '/tflib/')        # path for 'tflib' folder\n",
+    "from SRNet import *"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "train_batch_size = 32\n",
+    "valid_batch_size = 40\n",
+    "max_iter = 500000\n",
+    "train_interval=100\n",
+    "valid_interval=5000\n",
+    "save_interval=5000\n",
+    "num_runner_threads=10\n",
+    "\n",
+    "# Cover and Stego directories for training and validation. For the spatial domain put cover and stego images in their \n",
+    "# corresponding direcotries. For the JPEG domain, decompress images to the spatial domain without rounding to integers and \n",
+    "# save them as '.mat' files with variable name \"im\". Put the '.mat' files in thier corresponding directoroies. Make sure \n",
+    "# all mat files in the directories can be loaded in Python without any errors.\n",
+    "\n",
+    "TRAIN_COVER_DIR = '/media/TRN/Cover/'\n",
+    "TRAIN_STEGO_DIR = '/media/TRN/JUNI_75_04/'\n",
+    "\n",
+    "VALID_COVER_DIR = '/media/VAL/Cover/'\n",
+    "VALID_STEGO_DIR = '/media/VAL/JUNI_75_04/'\n",
+    "    \n",
+    "train_gen = partial(gen_flip_and_rot, \\\n",
+    "                    TRAIN_COVER_DIR, TRAIN_STEGO_DIR ) \n",
+    "valid_gen = partial(gen_valid, \\\n",
+    "                    VALID_COVER_DIR, VALID_STEGO_DIR)\n",
+    "\n",
+    "LOG_DIR = '/media/LogFiles/JUNI_75_04'  # path for a log direcotry \n",
+    "# load_path = LOG_DIR + 'Model_460000.ckpt'  # continue training from a specific checkpoint\n",
+    "load_path=None                              # training from scratch\n",
+    "\n",
+    "if not os.path.exists(LOG_DIR):\n",
+    "    os.makedirs(LOG_DIR)\n",
+    "\n",
+    "train_ds_size = len(glob(TRAIN_COVER_DIR + '/*')) * 2\n",
+    "valid_ds_size = len(glob(VALID_COVER_DIR +'/*')) * 2\n",
+    "print 'train_ds_size: %i'%train_ds_size\n",
+    "print 'valid_ds_size: %i'%valid_ds_size\n",
+    "\n",
+    "if valid_ds_size % valid_batch_size != 0:\n",
+    "    raise ValueError(\"change batch size for validation\")\n",
+    "    \n",
+    "optimizer = AdamaxOptimizer\n",
+    "boundaries = [400000]     # learning rate adjustment at iteration 400K\n",
+    "values = [0.001, 0.0001]  # learning rates\n",
+    "\n",
+    "train(SRNet, train_gen, valid_gen , train_batch_size, valid_batch_size, valid_ds_size, \\\n",
+    "      optimizer, boundaries, values, train_interval, valid_interval, max_iter,\\\n",
+    "      save_interval, LOG_DIR,num_runner_threads, load_path)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "# Testing \n",
+    "# Cover and Stego directories for testing\n",
+    "TEST_COVER_DIR = '/media/TST/Cover/'\n",
+    "TEST_STEGO_DIR = '/media/TST/JUNI_75_04/'\n",
+    "\n",
+    "test_batch_size=40\n",
+    "LOG_DIR = '/media/LogFiles/JUNI_75_04/' \n",
+    "LOAD_CKPT = LOG_DIR + 'Model_435000.ckpt'        # loading from a specific checkpoint\n",
+    "\n",
+    "test_gen = partial(gen_valid, \\\n",
+    "                    TEST_COVER_DIR, TEST_STEGO_DIR)\n",
+    "\n",
+    "test_ds_size = len(glob(TEST_COVER_DIR + '/*')) * 2\n",
+    "print 'test_ds_size: %i'%test_ds_size\n",
+    "\n",
+    "if test_ds_size % test_batch_size != 0:\n",
+    "    raise ValueError(\"change batch size for testing!\")\n",
+    "\n",
+    "test_dataset(SRNet, test_gen, test_batch_size, test_ds_size, LOAD_CKPT)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.15rc1"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}

SRNet/tflib/SCA_SRNet_JPEG.py

@@ -0,0 +1,133 @@
+import tensorflow as tf
+from functools import partial
+from tensorflow.contrib import layers
+from tensorflow.contrib.framework import arg_scope
+import functools
+from queues import *
+from generator import *       
+from utils_multistep_lr import *
+
+class SCA_SRNet(Model):
+    def _build_model(self, input_batch):
+        inputs_image, inputs_Beta = tf.split(input_batch, num_or_size_splits=2, axis=3)
+        if self.data_format == 'NCHW':
+            reduction_axis = [2,3]
+            _inputs_image = tf.cast(tf.transpose(inputs_image, [0, 3, 1, 2]), tf.float32)
+            _inputs_Beta = tf.cast(tf.transpose(inputs_Beta, [0, 3, 1, 2]), tf.float32)
+        else:
+            reduction_axis = [1,2]
+            _inputs_image = tf.cast(inputs_image, tf.float32)
+            _inputs_Beta = tf.cast(inputs_Beta, tf.float32)
+        with arg_scope([layers.conv2d], num_outputs=16,
+                       kernel_size=3, stride=1, padding='SAME',
+                       data_format=self.data_format,
+                       activation_fn=None,
+                       weights_initializer=layers.variance_scaling_initializer(),
+                       weights_regularizer=layers.l2_regularizer(2e-4),
+                       biases_initializer=tf.constant_initializer(0.2),
+                       biases_regularizer=None),\
+            arg_scope([layers.batch_norm],
+                       decay=0.9, center=True, scale=True, 
+                       updates_collections=None, is_training=self.is_training,
+                       fused=True, data_format=self.data_format),\
+            arg_scope([layers.avg_pool2d],
+                       kernel_size=[3,3], stride=[2,2], padding='SAME',
+                       data_format=self.data_format):
+            with tf.variable_scope('Layer1'): # 256*256
+                W = tf.get_variable('W', shape=[3,3,1,64],\
+                            initializer=layers.variance_scaling_initializer(), \
+                            dtype=tf.float32, \
+                            regularizer=layers.l2_regularizer(5e-4))
+                b = tf.get_variable('b', shape=[64], dtype=tf.float32, \
+                            initializer=tf.constant_initializer(0.2))
+                conv = tf.nn.bias_add( \
+                        tf.nn.conv2d(tf.cast(_inputs_image, tf.float32), \
+                        W, [1,1,1,1], 'SAME', \
+                        data_format=self.data_format), b, \
+                        data_format=self.data_format, name='Layer1')
+                actv=tf.nn.relu(conv)
+                prob_map = tf.sqrt(tf.nn.conv2d(tf.cast(_inputs_Beta, tf.float32), \
+                        tf.abs(W), [1,1,1,1], 'SAME', \
+                        data_format=self.data_format))
+                out_L1=tf.add_n([actv,prob_map])
+            with tf.variable_scope('Layer2'): # 256*256
+                conv=layers.conv2d(out_L1)
+                actv=tf.nn.relu(layers.batch_norm(conv))
+            with tf.variable_scope('Layer3'): # 256*256
+                conv1=layers.conv2d(actv)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn2=layers.batch_norm(conv2)
+                res= tf.add(actv, bn2)
+            with tf.variable_scope('Layer4'): # 256*256
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn2=layers.batch_norm(conv2)
+                res= tf.add(res, bn2)
+            with tf.variable_scope('Layer5'): # 256*256
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                res= tf.add(res, bn)
+            with tf.variable_scope('Layer6'): # 256*256
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                res= tf.add(res, bn)
+            with tf.variable_scope('Layer7'): # 256*256
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                res= tf.add(res, bn)
+            with tf.variable_scope('Layer8'): # 256*256
+                convs = layers.conv2d(res, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer9'):  # 128*128
+                convs = layers.conv2d(res, num_outputs=64, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res, num_outputs=64)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=64)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer10'): # 64*64
+                convs = layers.conv2d(res, num_outputs=128, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res, num_outputs=128)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=128)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer11'): # 32*32
+                convs = layers.conv2d(res, num_outputs=256, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res, num_outputs=256)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=256)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer12'): # 16*16
+                conv1=layers.conv2d(res, num_outputs=512)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=512)
+                bn=layers.batch_norm(conv2)
+                avgp = tf.reduce_mean(bn, reduction_axis,  keep_dims=True )
+        ip=layers.fully_connected(layers.flatten(avgp), num_outputs=2,
+                    activation_fn=None, normalizer_fn=None,
+                    weights_initializer=tf.random_normal_initializer(mean=0., stddev=0.01), 
+                    biases_initializer=tf.constant_initializer(0.), scope='ip')
+        self.outputs = ip
+        return self.outputs

SRNet/tflib/SCA_SRNet_Spatial.py

@@ -0,0 +1,133 @@
+import tensorflow as tf
+from functools import partial
+from tensorflow.contrib import layers
+from tensorflow.contrib.framework import arg_scope
+import functools
+from tflib.queues import *
+from tflib.generator import *       
+from tflib.utils_multistep_lr import *
+
+class SCA_SRNet(Model):
+    def _build_model(self, input_batch):
+        inputs_image, inputs_Beta = tf.split(input_batch, num_or_size_splits=2, axis=3)
+        if self.data_format == 'NCHW':
+            reduction_axis = [2,3]
+            _inputs_image = tf.cast(tf.transpose(inputs_image, [0, 3, 1, 2]), tf.float32)
+            _inputs_Beta = tf.cast(tf.transpose(inputs_Beta, [0, 3, 1, 2]), tf.float32)
+        else:
+            reduction_axis = [1,2]
+            _inputs_image = tf.cast(inputs_image, tf.float32)
+            _inputs_Beta = tf.cast(inputs_Beta, tf.float32)
+        with arg_scope([layers.conv2d], num_outputs=16,
+                       kernel_size=3, stride=1, padding='SAME',
+                       data_format=self.data_format,
+                       activation_fn=None,
+                       weights_initializer=layers.variance_scaling_initializer(),
+                       weights_regularizer=layers.l2_regularizer(2e-4),
+                       biases_initializer=tf.constant_initializer(0.2),
+                       biases_regularizer=None),\
+            arg_scope([layers.batch_norm],
+                       decay=0.9, center=True, scale=True, 
+                       updates_collections=None, is_training=self.is_training,
+                       fused=True, data_format=self.data_format),\
+            arg_scope([layers.avg_pool2d],
+                       kernel_size=[3,3], stride=[2,2], padding='SAME',
+                       data_format=self.data_format):
+            with tf.variable_scope('Layer1'): # 256*256
+                W = tf.get_variable('W', shape=[3,3,1,64],\
+                            initializer=layers.variance_scaling_initializer(), \
+                            dtype=tf.float32, \
+                            regularizer=layers.l2_regularizer(5e-4))
+                b = tf.get_variable('b', shape=[64], dtype=tf.float32, \
+                            initializer=tf.constant_initializer(0.2))
+                conv = tf.nn.bias_add( \
+                        tf.nn.conv2d(tf.cast(_inputs_image, tf.float32), \
+                        W, [1,1,1,1], 'SAME', \
+                        data_format=self.data_format), b, \
+                        data_format=self.data_format, name='Layer1')
+                actv=tf.nn.relu(conv)
+                prob_map = tf.nn.conv2d(tf.cast(_inputs_Beta, tf.float32), \
+                        tf.abs(W), [1,1,1,1], 'SAME', \
+                        data_format=self.data_format)
+                out_L1=tf.add_n([actv,prob_map])
+            with tf.variable_scope('Layer2'): # 256*256
+                conv=layers.conv2d(out_L1)
+                actv=tf.nn.relu(layers.batch_norm(conv))
+            with tf.variable_scope('Layer3'): # 256*256
+                conv1=layers.conv2d(actv)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn2=layers.batch_norm(conv2)
+                res= tf.add(actv, bn2)
+            with tf.variable_scope('Layer4'): # 256*256
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn2=layers.batch_norm(conv2)
+                res= tf.add(res, bn2)
+            with tf.variable_scope('Layer5'): # 256*256
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                res= tf.add(res, bn)
+            with tf.variable_scope('Layer6'): # 256*256
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                res= tf.add(res, bn)
+            with tf.variable_scope('Layer7'): # 256*256
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                res= tf.add(res, bn)
+            with tf.variable_scope('Layer8'): # 256*256
+                convs = layers.conv2d(res, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer9'):  # 128*128
+                convs = layers.conv2d(res, num_outputs=64, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res, num_outputs=64)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=64)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer10'): # 64*64
+                convs = layers.conv2d(res, num_outputs=128, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res, num_outputs=128)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=128)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer11'): # 32*32
+                convs = layers.conv2d(res, num_outputs=256, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res, num_outputs=256)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=256)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer12'): # 16*16
+                conv1=layers.conv2d(res, num_outputs=512)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=512)
+                bn=layers.batch_norm(conv2)
+                avgp = tf.reduce_mean(bn, reduction_axis,  keep_dims=True )
+        ip=layers.fully_connected(layers.flatten(avgp), num_outputs=2,
+                    activation_fn=None, normalizer_fn=None,
+                    weights_initializer=tf.random_normal_initializer(mean=0., stddev=0.01), 
+                    biases_initializer=tf.constant_initializer(0.), scope='ip')
+        self.outputs = ip
+        return self.outputs

SRNet/tflib/SRNet.py

@@ -0,0 +1,117 @@
+import tensorflow as tf
+from functools import partial
+from tensorflow.contrib import layers
+from tensorflow.contrib.framework import arg_scope
+import functools
+from tflib.queues import *
+from tflib.generator import *       
+from tflib.utils_multistep_lr import *
+
+class SRNet(Model):
+    def _build_model(self, inputs):
+        self.inputs = inputs
+        if self.data_format == 'NCHW':
+            reduction_axis = [2,3]
+            _inputs = tf.cast(tf.transpose(inputs, [0, 3, 1, 2]), tf.float32)
+        else:
+            reduction_axis = [1,2]
+            _inputs = tf.cast(inputs, tf.float32)
+        with arg_scope([layers.conv2d], num_outputs=16,
+                       kernel_size=3, stride=1, padding='SAME',
+                       data_format=self.data_format,
+                       activation_fn=None,
+                       weights_initializer=layers.variance_scaling_initializer(),
+                       weights_regularizer=layers.l2_regularizer(2e-4),
+                       biases_initializer=tf.constant_initializer(0.2),
+                       biases_regularizer=None),\
+            arg_scope([layers.batch_norm],
+                       decay=0.9, center=True, scale=True, 
+                       updates_collections=None, is_training=self.is_training,
+                       fused=True, data_format=self.data_format),\
+            arg_scope([layers.avg_pool2d],
+                       kernel_size=[3,3], stride=[2,2], padding='SAME',
+                       data_format=self.data_format):
+            with tf.variable_scope('Layer1'): 
+                conv=layers.conv2d(_inputs, num_outputs=64, kernel_size=3)
+                actv=tf.nn.relu(layers.batch_norm(conv))
+            with tf.variable_scope('Layer2'): 
+                conv=layers.conv2d(actv)
+                actv=tf.nn.relu(layers.batch_norm(conv))
+            with tf.variable_scope('Layer3'): 
+                conv1=layers.conv2d(actv)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn2=layers.batch_norm(conv2)
+                res= tf.add(actv, bn2)
+            with tf.variable_scope('Layer4'): 
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn2=layers.batch_norm(conv2)
+                res= tf.add(res, bn2)
+            with tf.variable_scope('Layer5'): 
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                res= tf.add(res, bn)
+            with tf.variable_scope('Layer6'): 
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                res= tf.add(res, bn)
+            with tf.variable_scope('Layer7'): 
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                res= tf.add(res, bn)
+            with tf.variable_scope('Layer8'): 
+                convs = layers.conv2d(res, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer9'):  
+                convs = layers.conv2d(res, num_outputs=64, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res, num_outputs=64)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=64)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer10'): 
+                convs = layers.conv2d(res, num_outputs=128, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res, num_outputs=128)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=128)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer11'): 
+                convs = layers.conv2d(res, num_outputs=256, kernel_size=1, stride=2)
+                convs = layers.batch_norm(convs)
+                conv1=layers.conv2d(res, num_outputs=256)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=256)
+                bn=layers.batch_norm(conv2)
+                pool = layers.avg_pool2d(bn)
+                res= tf.add(convs, pool)
+            with tf.variable_scope('Layer12'): 
+                conv1=layers.conv2d(res, num_outputs=512)
+                actv1=tf.nn.relu(layers.batch_norm(conv1))
+                conv2=layers.conv2d(actv1, num_outputs=512)
+                bn=layers.batch_norm(conv2)
+                avgp = tf.reduce_mean(bn, reduction_axis,  keep_dims=True )
+        ip=layers.fully_connected(layers.flatten(avgp), num_outputs=2,
+                    activation_fn=None, normalizer_fn=None,
+                    weights_initializer=tf.random_normal_initializer(mean=0., stddev=0.01), 
+                    biases_initializer=tf.constant_initializer(0.), scope='ip')
+        self.outputs = ip
+        return self.outputs

SRNet/tflib/generator.py

@@ -0,0 +1,81 @@
+import numpy as np
+from scipy import misc, io
+from glob import glob
+import random
+# from itertools import izip
+from random import random as rand
+from random import shuffle
+
+def gen_flip_and_rot(cover_dir, stego_dir, thread_idx, n_threads):
+    cover_list = sorted(glob(cover_dir + '/*'))
+    # print(cover_list)
+    stego_list = sorted(glob(stego_dir + '/*'))
+    nb_data = len(cover_list)
+    assert len(stego_list) != 0, "the stego directory '%s' is empty" % stego_dir
+    assert nb_data != 0, "the cover directory '%s' is empty" % cover_dir
+    assert len(stego_list) == nb_data, "the cover directory and " + \
+                                      "the stego directory don't " + \
+                                      "have the same number of files " + \
+                                      "respectively %d and %d" % (nb_data, + \
+                                      len(stego_list))
+    load_mat=cover_list[0].endswith('.mat')
+    if load_mat:
+        img = io.loadmat(cover_list[0])['im']
+        img_shape = img.shape
+        batch = np.empty((2,img_shape[0],img_shape[1],1), dtype='float32')
+    else:
+        img = misc.imread(cover_list[0])
+        img_shape = img.shape
+        batch = np.empty((2,img_shape[0],img_shape[1],1), dtype='uint8')
+    
+    iterable = list(zip(cover_list, stego_list))
+    while True:
+        shuffle(iterable)
+        print("shuffling……")
+        for cover_path, stego_path in iterable:
+            if  load_mat:
+                batch[0,:,:,0] = io.loadmat(cover_path)['im']
+                batch[1,:,:,0] = io.loadmat(stego_path)['im']
+            else:
+                batch[0,:,:,0] = misc.imread(cover_path)
+                batch[1,:,:,0] = misc.imread(stego_path)
+            rot = random.randint(0,3)
+            if rand() < 0.5:
+                yield [np.rot90(batch, rot, axes=[1,2]), np.array([0,1], dtype='uint8')]
+            else:
+                yield [np.flip(np.rot90(batch, rot, axes=[1,2]), axis=2), np.array([0,1], dtype='uint8')]
+                              
+
+def gen_valid(cover_dir, stego_dir, thread_idx, n_threads):
+    cover_list = sorted(glob(cover_dir + '/*'))
+    stego_list = sorted(glob(stego_dir + '/*'))
+    nb_data = len(cover_list)
+    assert len(stego_list) != 0, "the stego directory '%s' is empty" % stego_dir
+    assert nb_data != 0, "the cover directory '%s' is empty" % cover_dir
+    assert len(stego_list) == nb_data, "the cover directory and " + \
+                                      "the stego directory don't " + \
+                                      "have the same number of files " + \
+                                      "respectively %d and %d" % (nb_data, \
+                                      len(stego_list))
+    load_mat=cover_list[0].endswith('.mat')
+    if load_mat:
+        img = io.loadmat(cover_list[0])['im']
+        img_shape = img.shape
+        batch = np.empty((2,img_shape[0],img_shape[1],1), dtype='float32')
+    else:
+        img = misc.imread(cover_list[0])
+        img_shape = img.shape
+        batch = np.empty((2,img_shape[0],img_shape[1],1), dtype='uint8')
+    img_shape = img.shape
+    
+    labels = np.array([0, 1], dtype='uint8')
+    while True:
+        for cover_path, stego_path in zip(cover_list, stego_list):
+            if  load_mat:
+                batch[0,:,:,0] = io.loadmat(cover_path)['im']
+                batch[1,:,:,0] = io.loadmat(stego_path)['im']
+            else:
+                batch[0,:,:,0] = misc.imread(cover_path)
+                batch[1,:,:,0] = misc.imread(stego_path)
+            # print([batch,labels])
+            yield [batch, labels]

SRNet/tflib/queues.py

@@ -0,0 +1,68 @@
+import tensorflow as tf
+import threading
+
+class GeneratorRunner():
+	"""
+	This class manage a multithreaded queue filled with a generator
+	"""
+	def __init__(self, generator, capacity):
+		"""
+		inputs: generator feeding the data, must have thread_idx 
+			as parameter (but the parameter may be not used)
+		"""
+		self.generator = generator
+		_input = generator(0,1).__next__()
+		if type(_input) is not list:
+			raise ValueError("generator doesn't return" \
+							 "a list: %r" %  type(_input))
+		input_batch_size = _input[0].shape[0]
+		if not all(_input[i].shape[0] == input_batch_size for i in range(len(_input))):
+			raise ValueError("all the inputs doesn't have the same batch size,"\
+							 "the batch sizes are: %s" % [_input[i].shape[0] for i in range(len(_input))])
+		self.data = []
+		self.dtypes = []
+		self.shapes = []
+		for i in range(len(_input)):
+			self.shapes.append(_input[i].shape[1:])
+			self.dtypes.append(_input[i].dtype)
+			self.data.append(tf.placeholder(dtype=self.dtypes[i], \
+								shape=(input_batch_size,) + self.shapes[i]))
+		self.queue = tf.FIFOQueue(capacity, shapes=self.shapes, \
+								dtypes=self.dtypes)
+		self.enqueue_op = self.queue.enqueue_many(self.data)
+		self.close_queue_op = self.queue.close(cancel_pending_enqueues=True)
+		
+	def get_batched_inputs(self, batch_size):
+		"""
+		Return tensors containing a batch of generated data
+		"""
+		batch = self.queue.dequeue_many(batch_size)
+		return batch
+	
+	def thread_main(self, sess, thread_idx=0, n_threads=1):
+		try:
+			for data in self.generator(thread_idx, n_threads):
+				sess.run(self.enqueue_op, feed_dict={i: d \
+							for i, d in zip(self.data, data)})
+				if self.stop_threads:
+					return
+		except RuntimeError:
+			pass
+	
+	def start_threads(self, sess, n_threads=1):
+		self.stop_threads = False
+		self.threads = []
+		for n in range(n_threads):
+			t = threading.Thread(target=self.thread_main, args=(sess, n, n_threads))
+			t.daemon = True
+			t.start()
+			self.threads.append(t)
+		return self.threads
+
+	def stop_runner(self, sess):
+		self.stop_threads = True
+		sess.run(self.close_queue_op)
+
+def queueSelection(runners, sel, batch_size):
+	selection_queue = tf.FIFOQueue.from_list(sel, [r.queue for r in runners])
+	return selection_queue.dequeue_many(batch_size)

SRNet/tflib/utils_multistep_lr.py

@@ -0,0 +1,231 @@
+import tensorflow as tf
+import time
+from tflib.queues import *
+from tflib.generator import *
+
+class average_summary:
+    def __init__(self, variable, name, num_iterations):
+        self.sum_variable = tf.get_variable(name, shape=[], \
+                                initializer=tf.constant_initializer(0), \
+                                dtype=variable.dtype.base_dtype, \
+                                trainable=False, \
+                                collections=[tf.GraphKeys.LOCAL_VARIABLES])
+        with tf.control_dependencies([variable]):
+            self.increment_op = tf.assign_add(self.sum_variable, variable)
+        self.mean_variable = self.sum_variable / float(num_iterations)
+        self.summary = tf.summary.scalar(name, self.mean_variable)
+        with tf.control_dependencies([self.summary]):
+            self.reset_variable_op = tf.assign(self.sum_variable, 0)
+
+    def add_summary(self, sess, writer, step):
+        s, _ = sess.run([self.summary, self.reset_variable_op])
+        writer.add_summary(s, step)
+    
+class Model:
+    def __init__(self, is_training=None, data_format='NCHW'):
+        self.data_format = data_format
+        if is_training is None:
+            self.is_training = tf.get_variable('is_training', dtype=tf.bool, \
+                                    initializer=tf.constant_initializer(True), \
+                                    trainable=False)
+        else:
+            self.is_training = is_training
+
+    def _build_model(self, inputs):
+        raise NotImplementedError('Here is your model definition')
+
+    def _build_losses(self, labels):
+        self.labels = tf.cast(labels, tf.int64)
+        with tf.variable_scope('loss'):
+            oh = tf.one_hot(self.labels, 2)
+            xen_loss = tf.reduce_mean(tf.nn.softmax_cross_entropy_with_logits( \
+                                                    labels=oh,logits=self.outputs))
+            reg_losses = tf.get_collection(tf.GraphKeys.REGULARIZATION_LOSSES)
+            self.loss = tf.add_n([xen_loss] + reg_losses)
+        with tf.variable_scope('accuracy'):
+            am = tf.argmax(self.outputs, 1)
+            equal = tf.equal(am, self.labels)
+            self.accuracy = tf.reduce_mean(tf.cast(equal, tf.float32))