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From: spf@bonnie.ATT.COM
Newsgroups: comp.graphics
Subject: Re: Frequency distributions of red, green, and blue.
Message-ID: <2843@clyde.ATT.COM>
Date: Fri, 14-Nov-86 10:28:44 EST
Article-I.D.: clyde.2843
Posted: Fri Nov 14 10:28:44 1986
Date-Received: Sat, 15-Nov-86 02:32:02 EST
References: <647@husc6.HARVARD.EDU>
Sender: lp@clyde.ATT.COM
Reply-To: spf@bonnie.UUCP (Steve Frysinger)
Organization: AT&T Bell Laboratories, Whippany NJ
Lines: 20


From clyde!rutgers!seismo!husc6!endor!greg Fri Nov 14 09:58:22 EST 1986
Organization: Harvard

>Does anyone have know (or have references to) the exact frequency profiles of
>red, green, and blue phosphorous on a color monitor, red, green, and blue
>film, and the red, green, and blue receptors in a person's eye?
>Greg
>
You've fallen into a trap common to computer technologists and
engineers: you've assumed that the eye and brain work like a computer.
The cones in the eye's retina respond differentially to frequency
of the incoming radiation.  There are not three well-defined types
of receptors which one would call red, green, and blue.  Indeed, 
red, green, and blue refer to subjective color judgments, not
absolutes.  For a given individual you can measure the frequency's
which they REPORT as red, green and blue, but they will be different
for different folks.
Enjoy!
Steve