dwt

how to get dwt of gray texture, and see the four part of dwt image

Answer 1

[Wayne King]

Use wavedec2, or dwt2.

wavedec2 is appropriate if you want a multi-level transform. If you just want the first level, you can use dwt2

   load woman;
   [A,H,V,D] = dwt2(X,'db2');
   subplot(221) 
   imagesc(A)
   colormap gray
   subplot(222)
   imagesc(H)
   subplot(223)
   imagesc(V)
   subplot(224)
   imagesc(D)

You can also do it by starting the Wavelet Toolbox GUI

 >> wavemenu

and then selecting Wavelet 2-D