【图像压缩】图像无损压缩含Matlab源码

1 简介

介绍了JPEG图像压缩算法,并在MATLAB数学分析工具环境下从实验角度出发,较为直观地探讨了DCT在JPEG图像压缩中的应用.仿真实验表明,用MATLAB来实现离散余弦变换的图像压缩,具有方法简单,速度快,误差小的优点,大大提高了图像压缩的效率和精度.

2 部分代码

function varargout = ImageCompression1(varargin)
% IMAGECOMPRESSION1 MATLAB code for ImageCompression1.fig
% IMAGECOMPRESSION1, by itself, creates a new IMAGECOMPRESSION1 or raises the existing
% singleton*.
%
% H = IMAGECOMPRESSION1 returns the handle to a new IMAGECOMPRESSION1 or the handle to
% the existing singleton*.
%
% IMAGECOMPRESSION1('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in IMAGECOMPRESSION1.M with the given input arguments.
%
% IMAGECOMPRESSION1('Property','Value',...) creates a new IMAGECOMPRESSION1 or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before ImageCompression1_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to ImageCompression1_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 ImageCompression1
% Last Modified by GUIDE v2.5 15-Oct-2014 22:20:56
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @ImageCompression1_OpeningFcn, ...
'gui_OutputFcn', @ImageCompression1_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 ImageCompression1 is made visible.
function ImageCompression1_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 ImageCompression1 (see VARARGIN)
% Choose default command line output for ImageCompression1
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
guidata(hObject, handles);
set(handles.axes1,'visible','off')
set(handles.axes2,'visible','off')
axis off
axis off
% UIWAIT makes ImageCompression1 wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = ImageCompression1_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)

3 仿真结果

4 参考文献

[1]钱裕禄, 周雪娇. 基于DCT的JPEG图像压缩编码算法的MATLAB实现[J]. 浙江万里学院学报, 2002, 15(1):4.

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