cwq8.m

来自「图象的消噪,图象的压缩,图象的融合,图象的增强」· M 代码 · 共 27 行

load sinsin
image(X);
colormap(map);
colorbar;
%从分解系数中提取近似和细节
[cA1,cH1,cV1,cD1]=dwt2(X,'bior3.7');
A1=upcoef2('a',cA1,'bior3.7',1);
H1=upcoef2('h',cH1,'bior3.7',1);
V1=upcoef2('v',cV1,'bior3.7',1);
D1=upcoef2('d',cD1,'bior3.7',1);
%显示近似和细节
figure(2);
colormap(map);
subplot(221);
image(wcodemat(A1,192));
title('近似A1');
subplot(222);
image(wcodemat(H1,192));

title('水平细节H1');
subplot(223);
image(wcodemat(V1,192));
title('垂直细节V1');
subplot(224);
image(wcodemat(D1,192));
title('对角细节D1');