Article View: comp.os.ms-windows.programmer.misc
Article #2734Re: how to convert (C,M,Y) colours to (R,G,B)?
From: Paul Stratton
Date: Mon, 11 Jan 1993 22:17
Date: Mon, 11 Jan 1993 22:17
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In article <1993Jan7.211624.27277@emr1.emr.ca> jagrant@emr1.emr.ca (John Grant) writes: >I have several (C,M,Y) colour palettes that we use in UNIRAS graphics >on the VAX that I want to convert to (R,G,B) palettes for use in Windows. >Can anyone supply the algorithms to convert between these 2 colour >systems. I have code to convert between (H,L,S) and (R,G,B). >I think the relationship between CMY and RGB is quite simple, because >CMY is subtractive and RGB is additive. >-- >John A. Grant jagrant@emr1.emr.ca >Airborne Geophysics >Geological Survey of Canada, Ottawa It really is simple. For example if your CMY is in the range of 0 - 255 and you have a CMY value of (4, 195, 80) then the RGB value is 255 - 4 255 - 195 255 - 80 The only problem is I can't remember which CMY go with which RGB! I haven't done this in a while. -- Paul Stratton ----- ----- ----- ----- ----- ------ Sierra Geophysics, Inc. / / / / / / / / / P.O. Box 3886 ----- / /--- /----- /----- /-----/ Seattle, Wa. 98124 / / / / \ / \ / /
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Path: arc1-ca.pugleaf.net!sparky!uunet!nwnexus!ole!rwing!fnx!sgihbtn!paul From: paul@sierra.com (Paul Stratton) Newsgroups: comp.os.ms-windows.programmer.misc Subject: Re: how to convert (C,M,Y) colours to (R,G,B)? Message-ID: <1993Jan11.221759.7441@sierra.com> Date: 11 Jan 93 22:17:59 GMT References: <1993Jan7.211624.27277@emr1.emr.ca> Sender: news@sierra.com Organization: Sierra Geophysics Inc., Kirkland, Wa Lines: 28 Nntp-Posting-Host: fuji