Ooops - D65 != D65 ???
Ooops - D65 != D65 ???
- Subject: Ooops - D65 != D65 ???
- From: Uli Zappe <email@hidden>
- Date: Sat, 16 Jun 2007 03:37:12 +0200
Hi everybody,
back to this weird thing called "color management" after quite some
time ...
Currently, I have several colorimeter/spectrophotometer packages at
home for evaluation and comparison, among them the X-Rite/GM product
range (Eye-One Display, Eye-One Pro, huey Pro).
Soon after starting to create test profiles, I realized that even if
I set the 3 different X-Rite products all to exactly the same
whitepoint/gamma settings, e.g. D65 G1.8, they produced profiles with
*very* different whitepoints.
Now, I'm aware that (speaking in terms of an xyY chromaticity chart)
there's many different possible (x,y) combinations to produce a 6500
K whitepoint, but somehow I would have thought that a D65 whitepoint
is an unambiguous standard that defines one of the possible
combinations as a standard.
Also, I'm aware of the argument that the whitepoint setting isn't too
important, anyway.
Still, I would think it should be reasonable to expect some kind of
consistency at least in the product range of *one single
manufacturer* ... What's the point of having a standardized D65
setting if it means something different to each measurement device?
That doesn't exactly build confidence with regard to color management.
I'm very puzzled by this experience, and would appreciate comments
from the experts in this forum. Do I expect something unreasonable?
Do others experience consistent D65 results and I'm doing something
wrong (no idea what that could be, though)?
One additional remark: I was amazed that even in the expensive Eye-
One Pro package, the software is nothing more than a black box that
somehow produces a profile. There's no way to access the and work
with the physical measurement data at all. Is this generally the case
with this kind of products (well, AFAIK there aren't many
alternatives to an Eye-One Pro XT package, anyway), a kind of "people
in the graphics industry are no scientists" syndrom? (That's really a
difference to the music industry, BTW. When you buy a package to
calibrate a loudspeaker, you'll have access to the basic physics of
the process as much as you want.) Is there third party software to
fill this (expensive) void? So far, I stumbled across SpectraShop and
BabelColors, but hadn't time yet to look if they really do this kind
of thing.
Thanks in advance for any insight!
Bye
Uli
________________________________________________________
Uli Zappe, Solmsstraße 5, D-65189 Wiesbaden, Germany
http://www.ritual.org
Fon: +49-700-ULIZAPPE
Fax: +49-700-ZAPPEFAX
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