I need a code for Haar wavelet transform.
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Am currently working on image processing, am using Haar Wavelet transform for the feature extraction, i need a good working code on for it.
Thank you.
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Wayne King
2014 年 2 月 7 日
You can use wavedec2() with either wavelet name 'haar', or 'db1'
load woman;
J = 4; % level of the MRA
[C,S] = wavedec2(X,J,'haar');
See the help for appcoef2() and detcoef2() for how to pull out the approximation and detail coefficients.
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Walter Roberson
2014 年 2 月 7 日
http://www.mathworks.com/help/wavelet/ref/dbaux.html with N = 2. Haar is also called db2
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