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From: datta@cpsc.ucalgary.ca (Slarti)
Newsgroups: comp.graphics
Subject: Color Picking
Message-ID: <2241@cs-spool.calgary.UUCP>
Date: 14 Dec 89 06:21:48 GMT
Sender: news@calgary.UUCP
Reply-To: datta@cs-sun-fsb.UUCP (Slarti)
Organization: U. of Calgary, Calgary, Alberta, Canada
Lines: 19


Not being a regular subscriber to this group, I hope this message does not
rehash something which has already been discussed heavily.

What I would like to do is load in a color graphics format that is stored
with 24 bit planes and display it on an 8 bit device.  This in itself is not
difficult, but what I need is a method of choosing 256 colors that can best
be used to represent the image, without dithering or the like.  I can get
pictures to display fine with the default pallette for my machine, but I
feel they could be better if the colors were set appropriately.

Does an algorithm to do this exist?  I would assume it involves some sort
of vector math in RGBspace.  If anyone knows of a method, or has some code,
I would really appreciate it.

E-Mail responses would be preferred, but I'll keep my eye on the net for a
bit.

TIA