danch.m

数字图像处理

kk=imread('ziji3.jpg');
X=rgb2gray(kk);
X=double(X);
sX=size(X);
 [cA1,cH1,cV1,cD1]=dwt2(X,'db4');
 A0=idwt2(cA1,cH1,cV1,cD1,'db4',sX);
 ans=max(max(abs(X-A0))) 
figure(1);
 subplot(121);
 imshow(X,[]);
title('原始图像');
subplot(122);
imshow(A0,[]);
title('重构图像');