在用matlab做图片的分解与重构，代码运行结果出不来，求大神指教（下附代码和结果）

Question

分解的代码：

X=imread('photo.bmp');
nbcol=size(X,1);
[cA1,cH1,cV1,cD1]=dwt2(X,'db1');
cod_X=wcodemat(X,nbcol);
cod_cA1=wcodemat(cA1,nbcol);
cod_cH1=wcodemat(cH1,nbcol);
cod_cV1=wcodemat(cV1,nbcol);
cod_cD1=wcodemat(cD1,nbcol);
dec2d=[cod_cA1,cod_cH1;cod_cV1,cod_cD1];
subplot(1,2,1); imshow(X,[]);
subplot(1,2,2); imshow(dec2d,[]);

结果：

重构代码：
X=imread('photo.bmp');
sX=size(X);
[cA1,cH1,cV1,cD1]=dwt2(X,'db4');
A0=idwt2(cA1,cH1,cV1,cD1,'db4',sX);
subplot(1,2,1); imshow(X,[]);
title('Original Image');
subplot(1,2,2); imshow(A0,[]);
title('Image using idwt2');

结果：

求大神纠正，谢谢

Answer 1

http://blog.csdn.net/chenyusiyuan/article/details/1881940