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- Newsgroups: comp.graphics
- Path: sparky!uunet!usc!sdd.hp.com!ux1.cso.uiuc.edu!m.cs.uiuc.edu!vela!pd-dom!schuette
- From: schuette@wl.com (Wade Schuette)
- Subject: Re: Is there a mathematical relationship RGB -> wavelength?
- Message-ID: <1992Aug25.194755.7516@wl.com>
- Organization: Warner Lambert / Parke-Davis
- References: <1992Aug17.033205.23903@unocal.com> <57142@mentor.cc.purdue.edu>
- Date: Tue, 25 Aug 1992 19:47:55 GMT
- Lines: 26
-
- In article <57142@mentor.cc.purdue.edu> ab@nova.cc.purdue.edu (Allen B) writes:
- >In article <1992Aug17.033205.23903@unocal.com> stgprao@xing.unocal.com (Richard
- >Ottolini) writes:
- >> The psychology of color perception is much more complicated than the response
- >> of the four kinds of retina cells. The late Edwin Land of Polaroid was
- >> fond of showing images composed of two color primaries that appeared to have
- >> all the colors in it.
- >
- >I have heard about this through unreliable channels, but
- >my understanding is that he used two (black and white)
- >slide projectors. One had a red filter on it. Is that true?
- >
-
- I believe there was a Scientific American article about this a decade or
- so ago. My recollection was that he claimed he could do this trick with
- almost ANY two colors, and, to prove it, did it once using the sodium
- doublet at 5889 and 5891 angstroms, one for each projector. The projected
- image was a picnic, and observers could see the red and white checked
- tablecloth, the blue sky, green grass, orange oranges, etc.
-
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-
-
- --
- ==================================================================
- R. Wade Schuette schuette@wl.com Ann Arbor, MI, USA
-