2 degree vs. 10 degree
2 degree vs. 10 degree
- Subject: 2 degree vs. 10 degree
- From: Chris Murphy <email@hidden>
- Date: Sun, 9 Feb 2003 01:25:22 -0700
The LAB debate has caused me to think of yet another possibly "more
interesting than useful" topic. Everything in ICC-based color
management is 2-degree, D50 LAB (for output profiles) and I've always
wondered why we use 2-degree and not the newer 10-degree Standard
Observer data. Annex A of the ICC spec says the PCS is to be based on
the 2-degree Standard Observer.
What little I've been able to find on 2-degree vs 10-degree generally
says that 10-degree is considered to be better (better for what is
somewhat unclear), and some sources say it's more common. But not in
ICC-based color management.
Just curious. About five years ago I set a DTP41 to report back
10-degree, D50 LAB and built a profile. I have no data on this anymore
I'm sure, but what I recall was that the result was slightly better in
some areas, and no change in others. I'd have to repeat the test in
order to provide something other than vague supposition though.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
---------------------------------------------------------
Co-author "Real World Color Management"
Published by PeachPit Press (ISBN 0201773406)
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