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From: craig@weedeater.math.yale.edu (Craig Kolb)
Newsgroups: comp.graphics.visualization,comp.graphics
Subject: Re: Color Compression Software Available
Keywords: COLOR QUANTIZATION
Message-ID: <1991May2.185130.11728@cs.yale.edu>
Date: 2 May 91 18:51:30 GMT
References: <456@regina.uregina.ca> <52@mport.COM>
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In article <52@mport.COM> lee@mport.COM (Lee Crocker) writes:
>wan@mercury (Shijie Wan) writes:
>
>>	Color Compression Software Available
>
>> [Description of an implementation of the WWP vector quantizer.]
>
>There are several public domain sources for this algorithm, most of them
>based on an implementation by Craig Kolb.  The FBM utilities is probably
>the best source for Unix.  Piclab implements the algorithm for MSDOS.
>Both are available FTP from various graphics-oriented archive sites.

I should set the record straight by saying that, as far as I know, the
Utah Raster Toolkit is the only package that incorporates my code.  The
credit for "fbquant" and whatever is implemented in piclab goes to
their respective authors.

The code I wrote, "colorquant", implements the algorithm described in:

Wan, Wong, and Prusinkiewicz,
An Algorithm for Multidimensional Data Clustering,
Transactions on Mathematical Software, Vol. 14 #2 (June, 1988), pp. 153-162.

Colorquant is available via anonymous ftp from weedeater.math.yale.edu
as pub/colorquant.shar.  The Utah Raster Toolkit is available from
weedeater.math.yale.edu, freebie.engin.umich.edu, cs.utah.edu, and other
archives sites.

Cheers,
Craig