Re: a red-black wavelet kernel

> check-up the kernel I've calculated recently; It's high-pass kernel for
> first step of red-black wavelet transform; to test it - just put it into a
> any graphics program with 7x7 custom matrix filter capatibility
> (PaintShopPro will do) and type it. The more gray image becomes -> the more
> signal was removed
> 
> matrix:
> [ [0,-4, 0,6,0,-4,0]
>   [-4,0,13,0,13,0,-4]
>   [0,13,0,-88,0,13,0]
>   [6,0,-88,256,-88,0,6]
>   [0,13,0,-88,0,13,0]
>   [-4,0,13,0,13,0,-4]
>   [0,-4, 0,6,0,-4,0]]
> 
> it behaves very good on all standard test images (including lena, alu,
> arctic_hare, baboon, bear, peppers, texmos1.p512, water and z1x25)

It looks nicely circular... did you compare it to CDF(6,6)? (Maybe also 
to jpeg2000, but I don't know the transform they use?)

Carsten


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