【图像隐写】基于matlab GUI DWT+SVD数字水印 【含Matlab源码 939期】

一、DWT+SVD数字水印简介

理论知识参考文献：基于DWT和SVD的彩色图像数字水印算法研究
一种基于DWT-SVD的图像数字水印算法

二、部分源代码

function varargout = main(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @main_OpeningFcn, ...
                   'gui_OutputFcn',  @main_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin & isstr(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end

function main_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
guidata(hObject, handles);
function varargout = main_OutputFcn(hObject, eventdata, handles)
varargout{1} = handles.output;
function axes1_ButtonDownFcn(hObject, eventdata, handles)
function popupmenu1_CreateFcn(hObject, eventdata, handles)
if ispc
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end
function pushbutton1_Callback(hObject, eventdata, handles)
f1=uigetfile('*.bmp','打开载体图像');
guidata(hObject, handles);
global cover_object;
cover_object=imread(f1);
axes(handles.axes1);
imshow(cover_object);
title('载体图像');
function pushbutton3_Callback(hObject, eventdata, handles)
f2=uigetfile('*.jpg','打开原始水印图像');
guidata(hObject, handles);
global watermark;
watermark=imread(f2);
watermark=im2bw(watermark);
axes(handles.axes4);
imshow(watermark);
title('水印图像');
function pushbutton2_Callback(hObject, eventdata, handles)
global watermark;
global watermark_en;
Mm=size(watermark,1);               
Nm=size(watermark,2); 
N=Mm*Nm;
key=0.2345;
m(1)=key;
for i=1:N-1
    m(i+1)=4*m(i)-4*m(i)^2;
end
m=mod(1000*m,256);
m=uint8(m);m=im2bw(m);
n=1;
for i=1:Mm
    for j=1:Nm
        watermark_en(i,j)=bitxor(m(n),watermark(i,j));
        n=n+1;
    end
end
axes(handles.axes6);
imshow(watermark_en);
title('加密水印');
global watermark_en;
function pushbutton4_Callback(hObject, eventdata, handles)
global cover_object watermark_en CWI Temp;
[mm,nn]=size(cover_object); 
[mm1,nn1]=size(watermark_en);
[LL HL LH HH]=dwt2(cover_object,'haar');
[U,S,V]=svd(LL);
af=0.03;
[lm,ln]=size(LL);
WW=zeros(lm,ln);
for i=1:mm1
    for j=1:nn1
            WW(i,j)=watermark_en(i,j);
    end
end
Temp=S+af*WW;
[U1,S1,V1]=svd(Temp);
CW=U*S1*V';
I1=idwt2(CW,HL,LH,HH,'haar');
CWI=uint8(I1);
axes(handles.axes2);
imshow(CWI);
title('含水印信息的载体图像');
global CWI;
global Temp;
function pushbutton8_Callback(hObject, eventdata, handles)
global CWI;
global attackf;
f=CWI;
attackd=get(handles.popupmenu1,'Value');
while attackd~=0
switch attackd
    case 1,
    attackf=f;
    att='未攻击';
break;
  case 2,
f(20:180,20:180)=256;
attackf=f;
att='剪切图像';
break;
  case 3,
attackf=imadjust(f,[],[0.4,1]);
att='图像增亮';
break;
case 4,
attackf=imadjust(f,[],[0,0.95]);
att='图像变暗';
break;
case 5,

  

 

  
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三、运行结果

四、matlab版本及参考文献

1 matlab版本
2014a

2 参考文献
[1] 蔡利梅.MATLAB图像处理——理论、算法与实例分析[M].清华大学出版社，2020.
[2]杨丹,赵海滨,龙哲.MATLAB图像处理实例详解[M].清华大学出版社，2013.
[3]周品.MATLAB图像处理与图形用户界面设计[M].清华大学出版社，2013.
[4]刘成龙.精通MATLAB图像处理[M].清华大学出版社，2015.
[5]梁欣.基于DWT和SVD的彩色图像数字水印算法研究[J].计算机与数字工程. 2019,47(08)
[6]张秀娟,朱春伟.一种基于DWT-SVD的图像数字水印算法[J].数字技术与应用. 2017,(10)

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