图像压缩基于matlab GUI哈达玛变换图像压缩【含Matlab源码 845期】.zip

function varargout = hadamard_encoding(varargin) % HADAMARD_ENCODING M-file for hadamard_encoding.fig % HADAMARD_ENCODING, by itself, creates a new HADAMARD_ENCODING or raises the existing % singleton*. % % H = HADAMARD_ENCODING returns the handle to a new HADAMARD_ENCODING or the handle to % the existing singleton*. % % HADAMARD_ENCODING('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in HADAMARD_ENCODING.M with the given input arguments. % % HADAMARD_ENCODING('Property','Value',...) creates a new HADAMARD_ENCODING or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before hadamard_encoding_OpeningFunction gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to hadamard_encoding_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 hadamard_encoding % Last Modified by GUIDE v2.5 18-Jun-2009 20:25:20 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @hadamard_encoding_OpeningFcn, ... 'gui_OutputFcn', @hadamard_encoding_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []); if nargin & isstr(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 hadamard_encoding is made visible. function hadamard_encoding_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 hadamard_encoding (see VARARGIN) cr = 0.5; I = imread('lena.bmp'); axes(handles.axes1); imshow(I); I = double(I)/255; t = hadamard(8); fftcoe = blkproc(I,[8 8],'P1*x*P2',t,t); coevar = im2col(fftcoe,[8 8],'distinct'); coe = coevar; [y,ind] = sort(coevar); [m,n] = size(coevar); snum = 64-64*cr; for i = 1:n coe(ind(1:snum),i) = 0; end B2 = col2im(coe,[8 8],[512 512],'distinct'); I2 = blkproc(B2,[8,8],'P1*x*P2',t,t); I2 = I2./(8*8); axes(handles.axes2); imshow(I2); e = double(I) - double(I2); [m,n]=size(e); erms = sqrt(sum(e(:).^2)/(m*n)); set(handles.erms_edit,'string',erms); set(handles.cr_edit,'string',0.5); % Choose default command line output for hadamard_encoding handles.output = hObject; % Update handles structure guidata(hObject, handles); % UIWAIT makes hadamard_encoding wait for user response (see UIRESUME) % uiwait(handles.figure1); % --- Outputs from this function are returned to the command line. function varargout = hadamard_encoding_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 during object creation, after setting all properties. function image_pop_menu_CreateFcn(hObject, eventdata, handles) % hObject handle to image_pop_menu (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called % Hint: popupmenu controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc set(hObject,'BackgroundColor','white'); else set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor')); end % --- Executes on selection change in image_pop_menu. function image_pop_menu_Callback(hObject, eventdata, handles) % hObject handle to image_pop_menu (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) val = get(hObject,'value'); str = get(hObject,'string'); cr = str2num(get(handles.cr_edit,'string')); switch str{val} case 'Lena' I = imread('lena.bmp'); case 'Cameraman' I = imread('cameraman.tif'); case 'Peppers' I = imread('peppers.bmp'); case 'Fingerprint' I = imread('fingerprint.jpg'); case 'Licenceplate' I = imread('licenceplate.jpg'); case 'Cloudy' I = imread('cloudy.tif'); end axes(handles.axes1); imshow(I); I = double(I)/255; t = hadamard(8); fftcoe = blkproc(I,[8 8],'P1*x*P2',t,t); coevar = im2col(fftcoe,[8 8],'distinct'); coe = coevar; [y,ind] = sort(coevar); [m,n] = size(coevar); snum = 64-64*cr; for i = 1:n coe(ind(1:snum),i) = 0; end B2 = col2im(coe,[8 8],size(I),'distinct'); I2 = blkproc(B2,[8,8],'P1*x*P2',t,t); I2 = I2./(8*8); axes(handles.axes2); imshow(I2); e = double(I) - double(I2); [m,n]=size(e); erms = sqrt(sum(e(:).^2)/(m*n)); set(handles.erms_edit,'string',erms); set(handles.cr_edit,'string',0.5); % Hints: contents = get(hObject,'String') returns image_pop_menu contents as cell array % contents{get(hObject,'Value')} returns selected item from image_pop_menu % --- Executes during object creation, after setting all properties. function cr_edit_CreateFcn(hObject, eventdata, handles) % hObject handle to cr_edit (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 set(hObject,'BackgroundColor','white'); else set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor')); end function cr_edit_Callback(hObject, eventdata, handles) % hObject handle to cr_edit (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 cr_edit as text % str2double(get(hObject,'String')) returns contents of cr_edit as a double % --- Executes on button press in apply_button. function apply_button_Callback(hObject, eventdata, handles) % hObject handle to apply_button (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) cr = str2num(get(handles.cr_edit,'string')); I = getimage(handles.axes1); I = double(I)/255; t = hadamard(8); fftcoe = blkproc(I,[8 8],'P1*x*P2',t,t); coevar = im2col(fftcoe,[8 8],'distinct'); coe = coevar; [y,ind] = sort(coevar); [m,n] = size(coevar); snum = 64-floor(64*cr); for i = 1:n coe(ind(1:snum),i) = 0; end B2 = col2im(coe,[8 8],size(I),'distinct'); I2 = blkproc(B2,[8,8],'P1*x*P2',t,t); I2 = I2./(8*8); axes(handles.axes2); imshow(abs(I2)); e = double(I) - double(I2); [m,n]=size(e); erms = sqrt(sum(e(:).^2)/(m*n)); set(handles.erms_edit,'string',erms); % --- Executes on button press in close_button. function close_button_Callback(hObject, eventdata, handles) % hObject handle to close_button (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) close(hadamard_encoding); % --- Executes during object creation, after