untitled4.m

简单的DCT的MATLAB图象压缩实验

load wbard;
subplot(1,2,1);
image(X);
colormap(map);
title('原始图像');
[thr,sorh,keepapp,crit]=ddencmp('cmp','wp',X);
[Xc,treed,perf0,perfl2]=wpdencmp(X,sorh,3,'bior3.1',crit,thr,keepapp);
subplot(1,2,2);
image(Xc);
colormap(map);
title('压缩后的图像');
disp('压缩后图像剩余能量百分比');
perf0
disp('小波分解系数中置0的个数百分比:');
perfl2