Re: a red-black wavelet kernel

ahh... scaling factor is 256 and bias is 128, sorry, i forgot

Maciej

----- Original Message -----
From: "Maciek Urbański" <[email protected]>
To: <[email protected]>
Sent: Tuesday, June 18, 2002 12:27 PM
Subject: [tarkin-dev] 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)
>
> Maciej
>
>
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