【图像隐写】基于matlab GUI变换域的可逆数字水印系统设计【含Matlab源码 1813期】
【摘要】
一、变换域的可逆数字水印简介
计算机技术的飞速发展极大推动了多媒体技术的发展。多媒体产品给人们生活带来便利的同时,其内容认证及版权保护问题也显得越来越重要。在此背景下,数字水印技术成为当前多媒体技术中的...
一、变换域的可逆数字水印简介
计算机技术的飞速发展极大推动了多媒体技术的发展。多媒体产品给人们生活带来便利的同时,其内容认证及版权保护问题也显得越来越重要。在此背景下,数字水印技术成为当前多媒体技术中的一个焦点。
可逆水印技术(Reversible Watermarking Technique)则是数字水印技术中的一个重要部分,与一般的数字水印技术在原理上基本相同。但它独有的一个特点,是在提取出水印数据之后,还能够完全修复由于水印嵌入所造成的原始载体数据的损坏。这使得可逆水印技术广泛应用于军事、医学、法律等领域。传统的可逆水印技术研究多局限于空域。而多媒体信息,尤其是图像数据,在变换域嵌入水印有许多意想不到的优点。
本课题的目的是借助图像数据在变换域的特殊优点,对可逆图像水印算法进行研究,得到视觉效果和嵌入容量都较理想的变换域可逆水印算法。本文从水印技术的综述展开,讨论了在变换域上的可逆水印技术的各种算法。本文主要研究工作如下:
(1)在分析前人基于直方图修改的可逆水印技术基础上,提出一种基于差分图像直方图修改的可逆水印新算法,并在提升图像质量、提高嵌入容量以及实现篡改定位等三个方面对算法进行改进。
(2)研究基于整数小波变换(Integer Wavelet Transform)的可逆水印算法,通过双重水印的嵌入,在保证较高的图像视觉效果的同时,实现了精确的篡改定位功能。
实验表明,以上诸算法在保证嵌入容量的同时,还能保持很高的峰值信噪比,达到了预期的效果。
二、部分源代码
function varargout = watermark(varargin)
% WATERMARK MATLAB code for watermark.fig
% WATERMARK, by itself, creates a new WATERMARK or raises the existing
% singleton*.
%
% H = WATERMARK returns the handle to a new WATERMARK or the handle to
% the existing singleton*.
%
% WATERMARK('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in WATERMARK.M with the given input arguments.
%
% WATERMARK('Property','Value',...) creates a new WATERMARK or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before watermark_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to watermark_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 watermark
% Last Modified by GUIDE v2.5 18-Apr-2021 22:15:49
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @watermark_OpeningFcn, ...
'gui_OutputFcn', @watermark_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 watermark is made visible.
function watermark_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 watermark (see VARARGIN)
% Choose default command line output for watermark
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes watermark wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = watermark_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;
function edit1_Callback(hObject, eventdata, handles)
% hObject handle to edit1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edit1 as text
% str2double(get(hObject,'String')) returns contents of edit1 as a double
% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
% --- Executes on button press in pushbutton25.
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)
global img_3;
ImgPath=get(handles.edit1,'String');
img_3=imread(ImgPath);
axes(handles.axes1);
imshow(img_3);
% --- Executes on button press in pushbutton20.
function pushbutton20_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton20 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%————————————————————四级DWT——————————————————
global img_3;
global img_31;
global img_3c;
global img_3s;
[img_3c,img_3s]=wavefast(img_3,4,'haar'); % 得到haar小波变换的系数
img_31=wave2gray(img_3c,img_3s,16); % 将系数重排成图像显示
axes(handles.axes2);
imshow(img_31);
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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]韩纪庆,张磊,郑铁然.语音信号处理（第3版）[M].清华大学出版社，2019.
[2]柳若边.深度学习:语音识别技术实践[M].清华大学出版社，2019.
[3]薛德文.基于变换域的可逆图像水印算法研究[D].哈尔滨工业大学
文章来源: qq912100926.blog.csdn.net，作者：海神之光，版权归原作者所有，如需转载，请联系作者。
原文链接：qq912100926.blog.csdn.net/article/details/123694336
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