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From: p_davis@epik.enet.dec.com (Peter Davis)
Newsgroups: comp.multimedia
Subject: Re: affine transform
Message-ID: <19394@shlump.nac.dec.com>
Date: 24 Jan 91 15:31:40 GMT
Sender: newsdaemon@shlump.nac.dec.com
Organization: Digital Equipment Corporation
Lines: 21


In article <1991Jan22.220948.12523@pandora.matrox.com>, ltran@pluton.matrox.com (Linh TRAN) writes...
> 
>	I heard recently about a new class of transform (at
>least new for image compression purpose). My questions are:
> 
>	- does this have any relation with affine functions ?
>	- where could I find any reference about the beast ?
>	- any result about the performance of the algorithm
>          for image compression purposes ?
> 
You may be talking about "wavelets."  This is a mathematical technique developed
in the 1950's which has gotten publicity recently in being applied to signal
processing, compression, analysis, etc., as an alternative to the Fourier
transform.

There was a short write-up on this in a recent "Scientific American," but I
don't remember which month.  I've also seen other references listed.  You might
try asking in comp.graphics for more info.

-pd