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From: curts@usenet.umr.edu (Curt Schroeder)
Newsgroups: comp.graphics
Subject: Re: A Color Mixing Question
Keywords: tristimulus
Message-ID: <1768@umriscc.isc.umr.edu>
Date: 29 Nov 90 01:51:36 GMT
References: <43457@mips.mips.COM>
Sender: news@umriscc.isc.umr.edu
Reply-To: curts@ee.umr.edu (Curt Schroeder)
Organization: University of Missouri - Rolla
Lines: 27

In article <43457@mips.mips.COM> flanery@mips.COM (Mike Flanery) writes:
>
>
>I found a reference to "tristimulus
>values" for colors and how a mixture of colors can be calculated from
>their respective "tristimulus" values based upon proportions. But,
>there was no explanation for determining tristimulus values from what
>I am accustomed to working with: machine rgb values. 

Tristimulus values are used in regard to spectral sensitivities of image
sensors (including the human eye).  The Tristimulus or Standard Observer Curves
are the result of a large number of color-matching experiments performed by
many observers and have been averaged and processed to create the curves.  I am
getting my information from _Robot_Vision_, by Berthold Klaus Paul Horn, MIT
Press, 1986.  He has a few pages on the subject.

Curt Schroeder

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|  Curt Schroeder                      | curts@ee.umr.edu       |
|  University of Missouri - Rolla      | curts@cs.umr.edu       |
|  Electrical Engineering Department   | s076895@umrvma.bitnet  |
|  Rolla, Missouri  65401              | -- Apple II Forever -- |
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