dwt

ivy
2012 5 13
1 个回答
9 次查看（30 天）

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

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回答（1 个）

Wayne King
Wayne King 2012-5-13

0 个投票

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

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ivy
ivy
2012-5-13

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