【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】

原创

佛怒火莲 2022-03-25 10:46:02 博主文章分类：matlab完整代码 ©著作权

文章标签 matlab 数字水印数据 ide 文章分类 Java 后端开发

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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);