Re: Camera profiling with ICC et al
Re: Camera profiling with ICC et al
- Subject: Re: Camera profiling with ICC et al
- From: Uli Zappe <email@hidden>
- Date: Mon, 15 Sep 2008 22:45:06 +0200
Am 15.09.2008 um 19:55 schrieb email@hidden:
I found a very high correlation between the metrologically best
profiles and the ones that produced the most realistic (not
necessarily most pleasing) image variants.
Yes, that can well be true when all the errors are relatively large,
or in any one or small number of instances where the capture
happened to minimize metameric problems, but can fail when subjected
to comprehensive rigorous double-blind psychophysical testing when
only the natural subject matter is included.
Actually, the differences I saw were relatively large.
I would agree that you can certainly apply more sophisticated testing,
because of all the reasons you pointed out. OTOH, from what I've seen
I think using camera target shots for evaluation is at least
meaningful in the sense that it evaluates *necessary* profile behavior
for camera accuracy. I.e. while such a test cannot guarantee that a
profile that showed only little color deviation in the test will never
fail under more complicated lighting conditions, it can at least say
that profiles that already show large color deviations under the
testing conditions are no reasonable candidates for profiles to
deliver color accuracy.
Bye
Uli
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Uli Zappe, Solmsstraße 5, D-65189 Wiesbaden, Germany
http://www.ritual.org
Fon: +49-700-ULIZAPPE
Fax: +49-700-ZAPPEFAX
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