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.
部分理论引用网络文献，若有侵权联系博主删除。
5 MATLAB代码与数据下载地址
见博客主页
