No products are associated with this question.
You have to select the particular coefficients you want from the wavedec2 output vector. You can use detcoef2 for that.
For example, to view the diagonal details, HH, at level two
X = imread('cameraman.tif'); [C,S] = wavedec2(X,2,'haar'); [H,V,D] = detcoef2('all',C,S,2); imagesc(D); colormap gray
appcoef2() gives you the scaling coefficients
Then you can simply do:
X = imread('cameraman.tif'); [C,S] = wavedec2(X,2,'haar'); A2 = appcoef2(C,S,'haar',2); [H1,V1,D1] = detcoef2('all',C,S,1); [H2,V2,D2] = detcoef2('all',C,S,2);
Now you have all the images in your plot.
imagesc(A2); colormap gray;
gives you the image in the upper left corner and you have the 6 detail images. H1,V1,and D1 for level 1 and H2,V2, and D2 for level 2.