Path: utzoo!utgpu!water!watmath!watcgl!ksbooth
From: ksbooth@watcgl.waterloo.edu (Kelly Booth)
Newsgroups: comp.graphics
Subject: Re: The 24-bit question.
Keywords: color, colormaps
Message-ID: <3600@watcgl.waterloo.edu>
Date: 16 Mar 88 04:09:03 GMT
References: <927@xn.LL.MIT.EDU>
Reply-To: ksbooth@watcgl.waterloo.edu (Kelly Booth)
Organization: U. of Waterloo, Ontario
Lines: 17

In article <927@xn.LL.MIT.EDU> wjc@XN.LL.MIT.EDU (William J. Chiarchiaro) writes:
>
>Does anyone know of an algorithm for doing the following:
>
>	Take a digitized, color image composed of 24-bit pixels
>     (8 bits red, 8 bits green, 8 bits blue), and convert it to
>     an 8-bit-per-pixel color image along with a suitable
>     256-entry colormap (each entry has 8 bits of red, 8 of green,
>     and 8 of blue).

Paul Heckbert had a paper on this in SIGGRAPH '82.  No, this is not a joke.
He really did have a (serious) paper.  This is another of the semi-monthly
items that appear in comp.graphics.  It's been beaten to death.  Read the
original paper then check the literature for subsequent work.

P.S.  The work was done while Paul was an undergrad at M.I.T., I think as
an honors thesis.  Your school should have a copy :).