Re: Profiling Cinema
Re: Profiling Cinema
- Subject: Re: Profiling Cinema
- From: Don Hutcheson <email@hidden>
- Date: Fri, 09 Nov 2001 15:56:12 -0500
On Fri, 9 Nov 2001 01:10:53 EST, C. David Tobie wrote:
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For the Apple displays no gun adjustments are available, and the monitors are
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quite accuately set ot 6500, so again you can just use native as the white
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point, and live with the 6500 white point. Forcing the white point instead
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will imbalance your grays. If you don't want a 6500 white point, don't buy an
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Apple display.
David,
I have to disagree with your rather brutal dismissal of Apple LCDs for
anything but D-65. I regularly profile the ACD to D-50, or better still,
match it by eye to the local viewing box (usually a GTI SOFT-View which is
nominally D-50.)
The trick is to use the right software. I love Monaco and Gretag's CMYK
profiling but for monitors nothing can touch ProfileCity's ICC Display. It
stands out from other software by allowing the user to specify ANY white
point and gamma, and then accurately simulating those characteristics via
Apple's three 1-D video LUTs.
Having adjusted the white point to your requested temperature, ICC Display
goes on to set the same color balance in the RGB LUTs at three other points
on the curve (1/4-tone, mid-tone and 3/4-tone) in case the device has
non-linear gray balance. To my knowledge no other software attempts this,
except the old (but not as good) ColorBlind Prove it!
The second huge advantage of ICC Display is that it lets you set color
balance by eye, which I find essential for optimum matching to a local view
box. Some other software packages let you type in x,y coordinates or Kelvin
color temperatures to match a custom source, but how do you measure these
from a viewing box? ICC Display and Prove it! let you measure the adjacent
light with the same device you will profile the screen with, but I have
found no instrument that does this precisely enough for critical soft
proofing, and still get the best results setting white balance by eye.
The third unique thing I like about ICC Display is that it precisely shapes
the VLUTs with 32 coordinates so that any LCD can exhibit a true gamma
(power function), even though LCD displays do not naturally follow a gamma
function. The benefit of this is that the display now looks just like a
perfect CRT of the same gamma, even in non-color-managed applications like
the Finder. This also relieves the profile from having to measure and
compensate for the display's non-gamma characteristics, which translates to
better profiles.
Finally I like the fact that ICC Display incorporates true 3-D,
gamut-compression into the monitor profile. This goes a long way towards
displaying out-of-gamut colors more reasonably, instead of just clipping
them on the display. Even CRTs benefit from this feature, as many
transparency colors are WAY out of the gamut offered by today's LCD and CRT
monitors. My only complaints in this respect are that saturated blues tend
to go purple, and very dark RGB shadows tend to plug solid, but ProfileCity
are working to solve these relatively minor issues.
FWIW.
Don
*************************************
Don Hutcheson
Hutcheson Consulting
(Color Management Solutions)
Phone: (908) 689 7403
Mobile: (908) 500 0341
email@hidden
*************************************
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From: email@hidden
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Reply-To: email@hidden
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Date: Fri, 9 Nov 2001 10:16:40 -0800 (PST)
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To: email@hidden
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Subject: colorsync-users digest, Vol 2 #623 - 17 msgs
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Re: Profiling Cinema