yasuo.m

数字图像处理

function varargout = yasuo(varargin)
%YASUO M-file for yasuo.fig
%      YASUO, by itself, creates a new YASUO or raises the existing
%      singleton*.
%
%      H = YASUO returns the handle to a new YASUO or the handle to
%      the existing singleton*.
%
%      YASUO('Property','Value',...) creates a new YASUO using the
%      given property value pairs. Unrecognized properties are passed via
%      varargin to yasuo_OpeningFcn.  This calling syntax produces a
%      warning when there is an existing singleton*.
%
%      YASUO('CALLBACK') and YASUO('CALLBACK',hObject,...) call the
%      local function named CALLBACK in YASUO.M with the given input
%      arguments.
%
%      *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 yasuo

% Last Modified by GUIDE v2.5 04-Jun-2008 17:10:07

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @yasuo_OpeningFcn, ...
                   'gui_OutputFcn',  @yasuo_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 yasuo is made visible.
function yasuo_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   unrecognized PropertyName/PropertyValue pairs from the
%            command line (see VARARGIN)

% Choose default command line output for yasuo
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes yasuo wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = yasuo_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)

%装入图像
kk=imread('ziji4.jpg');
X=rgb2gray(kk);
X=double(X);
%[X,map]=rgb2ind(RGB,0.1);
%显示图像
figure(1);
subplot(221);imshow(X,[]);%colormap(map)
title('原始图像');
axis square
disp('压缩前图像X的大小：');
whos('X')
%对图像用bior3.7小波进行2层小波分解
[c,s]=wavedec2(X,2,'bior3.7');
%提取小波分解结构中第一层低频系数和高频系数
ca1=appcoef2(c,s,'bior3.7',1);
ch1=detcoef2('h',c,s,1);
cv1=detcoef2('v',c,s,1);
cd1=detcoef2('d',c,s,1);
%分别对各频率成分进行重构
a1=wrcoef2('a',c,s,'bior3.7',1);
h1=wrcoef2('h',c,s,'bior3.7',1);
v1=wrcoef2('v',c,s,'bior3.7',1);
d1=wrcoef2('d',c,s,'bior3.7',1);
c1=[a1,h1;v1,d1];
%显示分解后各频率成分的信息
subplot(222);imshow(c1,[]);
axis square
title('分解后低频和高频信息');
%下面进行图像压缩处理
%保留小波分解第一层低频信息，进行图像的压缩
%第一层的低频信息即为ca1，显示第一层的低频信息
%首先对第一层信息进行量化编码
ca1=appcoef2(c,s,'bior3.7',1);
ca1=wcodemat(ca1,440,'mat',0);
%改变图像的高度
ca1=0.5*ca1;
subplot(223);imshow(ca1,[]);%colormap(map);
axis square
title('第一次压缩');
disp('第一次压缩图像的大小为：');
whos('ca1')
%保留小波分解第二层低频信息，进行图像的压缩，此时压缩比更大
%第二层的低频信息即为ca2，显示第二层的低频信息
ca2=appcoef2(c,s,'bior3.7',2);
%首先对第二层信息进行量化编码
ca2=wcodemat(ca2,440,'mat',0);
%改变图像的高度
ca2=0.25*ca2;
subplot(224);imshow(ca2,[]);%colormap(map);
%axis square
title('第二次压缩');
disp('第二次压缩图像的大小为：');
whos('ca2')


% --- 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)
open tuxiangyasuo1

% --- 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)

kk=imread('ziji3.jpg');
X=rgb2gray(kk);
X=double(X);

figure();
subplot(221);
imshow(X,[]);
title('原始图像');
%colormap(map2);
[ca1,ch1,cv1,cd1]=dwt2(X,'bior3.7');
a1=upcoef2('a',ca1,'bior3.7',1);
h1=upcoef2('h' ,ch1,'bior3.7',1);
v1=upcoef2('v',cv1,'bior3. 7',1);
d1=upcoef2('d',cd1,'bior3. 7',1);
subplot(222);
%colormap(map2);
imshow(a1,[]);
title('第一次压缩图像');
[c,s]=wavedec2(X,2,'bior3.7');
ca2=appcoef2(c,s ,'bior3. 7',2);
a2=wrcoef2('a',c,s,'bior3.7',2);
subplot(223);
%colormap(map2);
imshow(a2,[]);
title('第二次压缩图像');
% --- 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)
open tuxiangyasuo2

% --- 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)

kk=imread('ziji8.jpg');
X=rgb2gray(kk);
X=double(X);
figure();
imshow(X,[]);
axis square
wname='haar';lev=3;
[c,s]=wavedec2(X,lev,wname);
alpha=1.5;m=3.5*prod(s(1,:));
[thr,nkeep]=wdcbm2(c,s,alpha,m);
xd=wdencmp('lvd',c,s,wname,lev,thr,'h');
figure(1);
subplot(1,2,1);
imshow(X,[]);
title('原始信号');
subplot(1,2,2);
imshow(xd,[]);
title('压缩后的信号');

% --- 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)

open yyyasuo