Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!pyramid!voder!apple!turk
From: turk@apple.UUCP (Ken "Turk" Turkowski)
Newsgroups: comp.graphics
Subject: Re: Two questions.
Message-ID: <6465@apple.UUCP>
Date: Mon, 12-Oct-87 21:36:31 EDT
Article-I.D.: apple.6465
Posted: Mon Oct 12 21:36:31 1987
Date-Received: Wed, 14-Oct-87 06:06:53 EDT
References: <12630002@acf4.UUCP>
Reply-To: turk@apple.UUCP (Ken "Turk" Turkowski)
Organization: Advanced Technology Graphics, Apple Computer, Cupertino, CA, USA
Lines: 30

In article <12630002@acf4.UUCP> mascagni@acf4.UUCP (Michael Mascagni) writes:
>Two questions:
>
>1. Does anybody have the
>        red(T), green(T), blue(T) functions for the black body radiation
>function where T is the absolute temperature of the radiating black body?
>If so what is it?
>
>2. If I have three (assume colorwise independent) light sources of given
>wavelength, how do I determine the coefficients to obtain a color of another,
>known wavelength as a combination of the other three colors?
>
>
>                            Michael Mascagni
>
>Address: National Institutes of Health
>         Building 31, Room 4B-54
>         Bethesda, Maryland  20892
>         (301) 496-4325
>         mascagni@acf4.nyu.edu (arpanet)

The book "Color Science" by Wyzscki & Stiles has the answer to these and
other similar questions, except that you'll have to convert from (x,y,Y)
chromaticity coordinates to RGB coordinates depending on the characteristics
of the phosphor in the monitor you are using.
-- 
Ken Turkowski @ Apple Computer, Inc., Cupertino, CA
UUCP: {mtxinu,sun,nsc,voder}!apple!turk
CSNET: turk@Apple.CSNET
ARPA: turk%Apple@csnet-relay.ARPA