压缩解压

开发平台：

Matlab

jpeg.m：源码内容

							clear all;
x=imread('H:lena.bmp');
figure(1);
subplot(121);
imshow(x);
Y=jpegencode(x,5);
X=jpegdecode(Y);
subplot(122);
imshow(X);
e=double(x)-double(X);
[m,n]=size(e);
erms=sqrt(sum(e(:).^2)/(m*n))
ave=mean(x(:));
x1=x.^2;
cs1=sum(x1(:));
x1=(x-X).^2;
cd1=sum(x1(:));
SNR=10*log10(cs1/cd1)
% figure(1);imshow(X);
% 
% localmax=imread('H:max.bmp');
% Last=X+localmax;
% figure(2);imshow(Last);

						