【图像隐藏】基于LSB算法实现数字水印嵌入提取matlab代码

1 简介

根据LSB算法简单易实现的特点,结合在图像置乱技术中很好特性的Arnold变换。利用变化产生影子图像。通过LSB算法将影子图像嵌入到掩饰图像中,再利用LSB算法将图像的影子图像提取出来。将提取出来的影子图像经过文中设计的Arnold反变换恢复出原始。该方法不但有效地无损伤隐藏了图像,同样还保证了隐藏图像的安全性,无损伤性。

2 部分代码

function varargout = shuiyin(varargin) % SHUIYIN MATLAB code for shuiyin.fig %     SHUIYIN, by itself, creates a new SHUIYIN or raises the existing %     singleton*. % %     H = SHUIYIN returns the handle to a new SHUIYIN or the handle to %     the existing singleton*. % %     SHUIYIN(’CALLBACK’,hObject,eventData,handles,...) calls the local %     function named CALLBACK in SHUIYIN.M with the given input arguments. % %     SHUIYIN(’Property’,’Value’,...) creates a new SHUIYIN or raises the %     existing singleton*. Starting from the left, property value pairs are %     applied to the GUI before shuiyin_OpeningFcn gets called. An %     unrecognized property name or invalid value makes property application %     stop. All inputs are passed to shuiyin_OpeningFcn via varargin. % %     *See GUI Options on GUIDE’s Tools menu. Choose "GUI allows only one %     instance to run (singleton)". % % See also: GUIDE, GUIDATA, GUIHANDLES % Edit the above text to modify the response to help shuiyin % Last Modified by GUIDE v2.5 12-Dec-2019 21:53:08 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct(’gui_Name’,       mfilename, ...                 ’gui_Singleton’, gui_Singleton, ...                 ’gui_OpeningFcn’, @shuiyin_OpeningFcn, ...                 ’gui_OutputFcn’, @shuiyin_OutputFcn, ...                 ’gui_LayoutFcn’, [] , ...                 ’gui_Callback’,   []); if nargin && ischar(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 % End initialization code - DO NOT EDIT % --- Executes just before shuiyin is made visible. function shuiyin_OpeningFcn(hObject, eventdata, handles, varargin) % This function has no output args, see OutputFcn. % hObject   handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles   structure with handles and user data (see GUIDATA) % varargin   command line arguments to shuiyin (see VARARGIN) % Choose default command line output for shuiyin handles.output = hObject; % Update handles structure guidata(hObject, handles); % UIWAIT makes shuiyin wait for user response (see UIRESUME) % uiwait(handles.figure1); % --- Outputs from this function are returned to the command line. function varargout = shuiyin_OutputFcn(hObject, eventdata, handles) % varargout cell array for returning output args (see VARARGOUT); % hObject   handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles   structure with handles and user data (see GUIDATA) % Get default command line output from handles structure varargout{1} = handles.output; % --- Executes on button press in pushbutton1. function pushbutton1_Callback(hObject, eventdata, handles) % hObject   handle to pushbutton1 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles   structure with handles and user data (see GUIDATA) [filename1, pathname1] = uigetfile(’*.jpg’, ’选择水印图片’); % --- Executes on button press in pushbutton3. function pushbutton3_Callback(hObject, eventdata, handles) % hObject   handle to pushbutton3 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles   structure with handles and user data (see GUIDATA) axes(handles.axes3); f=handles.f; imshow(f); title(’置乱后的水印图像’); guidata(hObject, handles); % --- Executes on button press in pushbutton4. function pushbutton4_Callback(hObject, eventdata, handles) % hObject   handle to pushbutton4 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles   structure with handles and user data (see GUIDATA) axes(handles.axes4);axis off imshow(handles.J); title(’嵌入水印后图像’); % --- Executes during object creation, after setting all properties. function text2_CreateFcn(hObject, eventdata, handles) % hObject   handle to text2 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles   empty - handles not created until after all CreateFcns called % --- Executes on button press in pushbutton5. function pushbutton5_Callback(hObject, eventdata, handles) % hObject   handle to pushbutton5 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles   structure with handles and user data (see GUIDATA) axes(handles.axes5);axis off imshow(handles.f_get);   title(’提取后的水印图像’); % --- Executes on button press in pushbutton6. function pushbutton6_Callback(hObject, eventdata, handles) % hObject   handle to pushbutton6 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles   structure with handles and user data (see GUIDATA) axes(handles.axes6);axis off imshow(handles.f_re); title(’解密后的水印图像’); guidata(hObject, handles); tiqushuiyin=double(handles.f_re); water=double(handles.water); [m,n,q]=size(water); sum1=0; sum2=0; sum3=0; for i=1:m   for j=1:n       sum1=sum1+water(i,j)*tiqushuiyin(i,j);       sum2=sum2+water(i,j)*water(i,j);       sum3=sum3+tiqushuiyin(i,j)*tiqushuiyin(i,j);   end end NC=sum1/sqrt((sum2))/sqrt(sum3); set(handles.text2,’String’,[’相关系数NC=’,num2str(NC)]);

3 仿真结果

4 参考文献

[1]龙菲. 基于LSB算法的数字水印实现[J]. 安庆师范学院学报(自科版)(3):64-69.

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