Re[2]: Eizo Calibration/basICColor with GAMMA L*

• Subject: Re[2]: Eizo Calibration/basICColor with GAMMA L*
• From: Peter Karp <email@hidden>
• Date: Wed, 18 May 2005 10:30:58 +0200
• Delivered-to: email@hidden
• Delivered-to: email@hidden

> How exactly does one measure this "white point as is"? Could you please
> provide a "step-by-step-how-to" example of how you would do it? (e.g.: What
> color profile drives the display when the measurement is taken?

1. There should be no calibration curve active on the display. You can
check this with Apples programm "Gammas". If this is not the case you
have to choose a profile which resets the video card LUT. In Tiger
many of the default profiles will do this. In Panther you'll have to
find a profile like the "D"-profile for example from the homepage from
www.brucelindbloom.com

2. Reset the display to the default values of whitepoint (some
displays offer also a "native" setting)

3. Measure the white point on a white desktop with any device capable of
measuring TFT's. If possible note the xy-values instead of the color
temperature.

Calibration packages which offer a "native whitepoint" calibration
often still modify the video cards LUT (I'm not aware of any
exceptions). You can check this again with Apples  Gammas (example
application in the developer package). I have a zipped version
uploaded here, so that you don't need to install the developer tools
just to get a tiny sample application:

     http://www.karpfenteich.net/colorful/Gammas.zip

Best regards
Peter

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