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From: blair@pyro.ei.dupont.com (Grant Blair)
Newsgroups: comp.sys.amiga.tech
Subject: Re: QMS plotmaster colors & pantone colors
Message-ID: <1991Jan7.142913.10145@pyro.ei.dupont.com>
Date: 7 Jan 91 14:29:13 GMT
References: <521358@neabbs.UUCP> <1990Dec28.225435.214@lavaca.uh.edu> <1390@radius.com>
Organization: DuPont Electronic Imaging
Lines: 36

In article <1390@radius.com> pierce@radius.com (Pierce T. Wetter III) writes:
>>>The problem is : monitor colors != paper colors.
>
[Much other text deleted...]

>
>   There's an alogrithm:
>
>     gamma correct your monitor.
>     convert from your monitors phosphor set to CIE XYZ (a device independent
>        color space based on human vision).
>     Buy a spectrophotometer.
>
>     Print out every possible combination of C,M,Y,K.
>     Measure output swatches with spectrophotometer to make a XYZ-CMYK
>        lookup table.
>
>    Convert images to XYZ, then lookup CMYK.
>
>    Print.
>
>
>   Believe or not, that's about the state of the art (minus details).
>
Also worth adding, for those about to embark upon attacking this problem, is 
the knowledge that not every monitor color can be expressed on paper as a CMYK
combination. i.e. the monitor's gamut is often a superset of the printer's
gamut and in places the two may  not overlap at all...



-- 
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|Grant C Blair, DuPont Imaging Systems, Newark, DE 19702, USA                 |
|blair@pyro.ei.dupont.com (192.58.195.64)        (302)-733-9533               |
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