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Article #924

Re: Big RGB <-: CMY Problem

#924
From: Alastair Thomson
Date: Thu, 07 Jan 1993 22:09
29 lines
1940 bytes
In article <C0HM2E.Grx@cs.dal.ca>, legrady@ug.cs.dal.ca (Tom Legrady) writes:
> 
> If you have white light light and remove the red, you wind up with
> cyan.  No two ways about it. Remove the green from white and the
> remainder is magenta. Take out the blue and the result is yellow.

The question here is what do you mean by "white light", or "green", do you mean
the entire visible spectrum?, do you mean what you see as white on a CRT?, is
green one wave length?, is green a range of wavelengths?, what range?  

The real difficulty is that we are talking about the perception of colour, not
some mathematical model of it. If the original poster could specifiy exactly
why they want to do the conversion I may be able to help some more

Alastair
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Alastair Thomson,                   | Phone +64-3-479-8347
University of Otago,                | Fax   +64-3-479-8529
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Message-ID: <1993Jan8.110908.484@otago.ac.nz>
Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!waikato.ac.nz!canterbury.ac.nz!otago.ac.nz!athomson
References: <1993Jan5.145712.10249@newsserver.rrzn.uni-hannover.de> <1icliuINNfkj@cascade.cs.ubc.ca> <1993Jan7.124214.8940@tom.rz.uni-passau.de> <C0HM2E.Grx@cs.dal.ca>

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Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!waikato.ac.nz!canterbury.ac.nz!otago.ac.nz!athomson
Newsgroups: sci.image.processing
Subject: Re: Big RGB <-: CMY Problem
Message-ID: <1993Jan8.110908.484@otago.ac.nz>
From: athomson@otago.ac.nz (Alastair Thomson)
Date: 8 Jan 93 11:09:08 +1300
References: <1993Jan5.145712.10249@newsserver.rrzn.uni-hannover.de> 
 <1icliuINNfkj@cascade.cs.ubc.ca> <1993Jan7.124214.8940@tom.rz.uni-passau.de> <C0HM2E.Grx@cs.dal.ca>
Organization: University of Otago, Dunedin, New Zealand
Lines: 29