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Science Forum Index » Compression Forum » Walsh Hadamard transform...
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| Thiophene... |
 Posted: Sat May 24, 2008 12:05 pm |
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Guest
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Yes the Walsh Hadamard transform is a really bad transform to use for
compression. However I have tried some experiments using the
intermediate values obtained during 2 applications of the WHT (it is
self-inverse) and obtained some improved results.
I do the forward and inverse transforms (keeping the vector length
unchanged at each step) and then look for the highest magnitude
element. Zero that element and then recalculate all the intermediate
values again. Kind of a wavelet thing.
http://code.google.com/p/lemontree/downloads/list |
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