how to calculate wavelet filter on still image

[gunar hendarko (gunar.hendarko@yahoo.com)]

===hello==

>> when i write some matrix 2x2 (ex: [2 2 ; 2 2]) then i give some wavelet filter (ex:haar) the result is [4 0; 00]
>> any one can tell me how the procces from matrix [2 2;2 2] become [4 0;0 0]
>> anyone can explan to me..

[Philip Oakley (philipoakley.nospam@iee.org)]

Haar is a sum & difference filter. It is the simplest of wavelet filters.

For the 2D example you do it first in one direction then in the other. You then have four results, with the overall sum in the top left, and the double difference in bottom right.

http://en.wikipedia.org/wiki/Haar_wavelet
http://www.bearcave.com/misl/misl_tech/wavelets/haar.html
http://dmr.ath.cx/gfx/haar/

Philip

[Tainnameext (vektoriya@seexi.net)]

So simple when you know how Thanks SOOO much. I was getting frustrated. Now I just need to learn how to start it up, fly it, and then I guess how to shoot things but...one step at a time =

Thanks again
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