exjpeg.m

来自「常用图像压缩编码码matlab实现。包括：DM编码、变换编码（FFT和DCT）、」· M 代码 · 共 15 行

clear all
tic
x = imread('lena512.bmp');
figure;
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 = erms(x, X)  %sqrt(sum(e(:).^2)/(m*n))
cr = imageratio(x, y)
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