Newsgroups: comp.archives
Path: utzoo!utgpu!news-server.csri.toronto.edu!ox.com!msen.com!emv
From: craig@weedeater.math.yale.edu (Craig Kolb)
Subject: [visualization...] Re: Color Compression Software Available
Message-ID: <1991May9.011512.17971@ox.com>
Followup-To: comp.graphics.visualization,comp.graphics
Keywords: COLOR QUANTIZATION
Sender: emv@msen.com (Edward Vielmetti, MSEN)
Reply-To: craig@weedeater.math.yale.edu (Craig Kolb)
Organization: Yale University Department of Mathematics
References: <456@regina.uregina.ca> <52@mport.COM> 
Date: Thu, 9 May 1991 01:15:12 GMT
Approved: emv@msen.com (Edward Vielmetti, MSEN)
X-Original-Newsgroups: comp.graphics.visualization,comp.graphics

Archive-name: graphics/color/colorquant/1991-05-02
Archive: weedeater.math.yale.edu:pub/colorquant.shar [130.132.23.17]
Original-posting-by: craig@weedeater.math.yale.edu (Craig Kolb)
Original-subject: Re: Color Compression Software Available
Reposted-by: emv@msen.com (Edward Vielmetti, MSEN)

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

-- comp.archives file verification
weedeater.math.yale.edu
-rw-r--r--   1 craig    pinheads   32025 Dec  5  1989 pub/colorquant.shar
found colorquant ok
weedeater.math.yale.edu:pub/colorquant.shar