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From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: comp.graphics
Subject: Re: Colour vision
Message-ID: <5675@brl-smoke.ARPA>
Date: Sat, 14-Mar-87 15:20:12 EST
Article-I.D.: brl-smok.5675
Posted: Sat Mar 14 15:20:12 1987
Date-Received: Tue, 17-Mar-87 01:46:07 EST
References: <505@ubu.warwick.UUCP>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 16

There are many aspects to color and its perception.
One important thing to be aware of is that there are
colors that are not in the "spectrum".  Another is
that the eye does not contain simply a continuous
frequency-and-intensity-measurer, but a complex
collection of detectors the composite output of
which is combined, along with other mental
processes (including some psychological ones) to
determine what one "sees".

It isn't possible to come up with a positive-definite
metric for "color space".  I read some work done long
ago by E. Schr"odinger and perhaps O. Veblen on this.

I hope some specialists in this field will post
a few good references describing color vision.