随机LSB匹配算法,随机选择算法,matlab

function varargout = LSB(varargin) % LSB MATLAB code for LSB.fig % LSB, by itself, creates a new LSB or raises the existing % singleton*. % % H = LSB returns the handle to a new LSB or the handle to % the existing singleton*. % % LSB('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in LSB.M with the given input arguments. % % LSB('Property','Value',...) creates a new LSB or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before LSB_OpeningFcn gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to LSB_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 LSB % Last Modified by GUIDE v2.5 09-Jun-2020 12:42:32 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @LSB_OpeningFcn, ... 'gui_OutputFcn', @LSB_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 LSB is made visible. function LSB_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 LSB (see VARARGIN) % Choose default command line output for LSB handles.output = hObject; % Update handles structure guidata(hObject, handles); % UIWAIT makes LSB wait for user response (see UIRESUME) % uiwait(handles.figure1); % --- Outputs from this function are returned to the command line. function varargout = LSB_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) [filename,filepath]=uigetfile('.bmp','选择原始bmp图片文件'); if(filename==0) return; end global originalfile x originalfile= strcat(filepath,filename); x=imread(originalfile); subplot(handles.axes1); imshow(originalfile); % --- Executes on button press in pushbutton2. function pushbutton2_Callback(hObject, eventdata, handles) % hObject handle to pushbutton2 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) [filename,filepath]=uigetfile('.bmp','选择嵌入隐秘文件'); if(filename==0) return; end global secretfile y secretfile= strcat(filepath,filename); y=imread(secretfile); subplot(handles.axes2); imshow(secretfile); % --- 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) %ary 表示那个比特面,1是最低比特位 global x y z ary = 1; cover_object = rgb2gray(x); %读取本人照片信息得到灰度图信息 cover_object_ll = bitget(cover_object, ary); %得到最后1位比特 subplot(handles.axes5); %唤醒一个窗口 imshow(cover_object); %展示原图像形成的灰度图 subplot(handles.axes6); imshow(255*cover_object_ll); %最低位左移到最高位，展示原图像的最低位 message = im2bw(y, graythresh(y)); %将指纹图像变为二值图 subplot(handles.axes7); imshow(message);%展示隐秘信息的二值图 Mc = size(cover_object, 1); %Height 读取图片的大小 Nc = size(cover_object, 2); %Width message = imresize(message, [Mc Nc]); %使被隐藏图片和载体图片等长宽 z = cover_object; %使得载体图片的最后一个比特位，与被隐藏图片的数据相等 for ii = 1 : Mc for jj = 1 : Nc if ii*jj < Mc * Nc %小于指纹信息的图片大小 if cover_object_ll(ii, jj) ~= message(ii, jj) %左右两端不相等，结果为一 if cover_object_ll(ii, jj) == 1 z(ii, jj) = bitset(z(ii,jj), ary, 0); %不相等改为0 else z(ii, jj) = bitset(z(ii,jj), ary, 1); end end end end end subplot(handles.axes3);%显示嵌入隐秘信息后的图片 imshow(z); subplot(handles.axes8);%显示隐秘信息的最低位 watermarked_image_ll = bitget(z, ary); imshow(255 * watermarked_image_ll); figure; imshow(z); title('watermarked picture'); saveas(gcf, '加密后.bmp'); %title('watermarked picture`s lowest bit'); % --- 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) file='加密后.bmp' water_pic = imread(file); %待提取图像 water_pic_1 = bitget(water_pic, 1); %得到最后1位比特 subplot(handles.axes4);%显示提取出的隐秘信息 imshow(255*water_pic_1); figure imshow(255*water_pic_1); saveas(gcf,'提取出.bmp');