dwt.m

这是偶自己的作品拉

I=imread('E:\my\毕业设计\matlab\Lena256.bmp','bmp');
%I=rgb2gray(I);
[LL1,HL1,LH1,HH1]=dwt2(I,'db1');
subplot(2,2,1);imshow(LL1,[]);
title('近似分量');
subplot(2,2,2);imshow(HL1);
HL1
title('水平细节');
subplot(2,2,3);imshow(LH1);
title('垂直细节');
subplot(2,2,4);imshow(HH1);
title('对角细节');

X=imread('E:\matlab1\LENAcaise64.bmp','bmp');
WN='sym3';
[C,S]=wavedec2(X,1,WN);
cA1=appcoef2(C,S,WN,1);
cH1=detcoef2('h',C,S,1);
cV1=detcoef2('v',C,S,1);
cD1=detcoef2('d',C,S,1);
RA1=idwt2(cA2,cH1,cV1,cD1,WN,size(X));
RA1=uint8(RA1);
figure(300);imshow(RA1);title('增强后图像');