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From: klm@munsell.UUCP
Newsgroups: sci.physics,comp.graphics,comp.sys.ibm.pc
Subject: Re: Color questions
Message-ID: <1080@knopfler.munsell.UUCP>
Date: Wed, 17-Jun-87 21:49:30 EDT
Article-I.D.: knopfler.1080
Posted: Wed Jun 17 21:49:30 1987
Date-Received: Sat, 20-Jun-87 00:36:51 EDT
Distribution: na
Organization: Eikonix Corp., Bedford, MA
Lines: 32
Keywords: Uh Huh...
Xref: utgpu sci.physics:1597 comp.graphics:741 comp.sys.ibm.pc:4264


Our ears are burning...

A few of us here at Eikonix are wading through this glut of postings and
we will shortly attempt to answer as many of the questions as we can.
As one poster already pointed out, some of what we know to be fact is
proprietary, so we'll have to gloss around it.  We're also going to give
references to some papers we've published on the subject, plus some other
hopefully useful sources.

Hold your breath until you turn a nice shade of cyan :-)

BTW, I really liked the 'trivial' answer to the RGB -> CMY transform,
although it really should have been posted to rec.humor.

The transform from a 3-D color space (RGB, uvL, etc.) to a 4-D color space
(CMYK) is not trivial and is not solvable in closed form.  You gotta go
backwards first and build a table that allows you to weed out the multiple
choices when you go forward again.  I know this explanation is rather
sophomoric, but it's kind of late, I'm getting tired, and I want to be
careful that I don't give out any secrets that would cause my employers to
get pissed at me.  I'm not quite ready to take up the job offer from the
guy at DuPont (?)

Stay tuned to sci.physics.  That's where we'll be posting.  No cross postings
unless I get sufficient demand.

-- 
Kevin McBride         |Disclaimer:  These   | harvard -\
Eikonix - A Kodak Co. |  opinions are mine, | ll-xn ---adelie-----> munsell!klm
23 Crosby Dr.         |  not my employer's, | decvax -v  talcott -v  |
Bedford, MA 01730     |  So There!          | allegra ------------encore