Re: fundamental question - monitor profile as working RGB?
Re: fundamental question - monitor profile as working RGB?
- Subject: Re: fundamental question - monitor profile as working RGB?
- From: Chris Murphy <email@hidden>
- Date: Thu, 11 Dec 2003 12:04:23 -0700
On Dec 11, 2003, at 6:40 AM, Graeme Gill wrote:
Chris Murphy wrote:
The independent testing of the Artisan demonstrates a simple matrix
based profile, with identical TRCs for each channel, can do the job
with outstanding quality. Small (matrix) profiles and low color
accuracy are not concomitant.
A specific high quality monitor is not the general case though. I'm
sure
for some (many ?) CRT monitors, especially high quality ones, the
additive
assumption is a very good one, and they may even be quite well gray
balanced, allowing a single TRC. For an unknown display device,
with (perhaps) unknown processing of its signals (very likely with an
LCD,
where the electronics is trying to emulate a CRT, I imagine that such
assumptions
could be far from the mark.
I agree but in practice I've seen more problems with table based
display profiles for such displays than just making the assumptions
found in a matrix profile and living with slight inaccuracy. I don't
know what the problem is because I haven't done enough of an analysis
or sampling. Maybe it's in the samples being taken, maybe it's in the
spacing of those samples, or maybe it's a CMM bug. I don't have any
idea really but my experience with table based profiles for the average
display gives me something less than smooth gradients. I see bands.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
---------------------------------------------------------
Co-author "Real World Color Management"
Published by PeachPit Press (ISBN 0-201-77340-6)
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