Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: BasICColor and "vcgt" tag

At 11:03 AM +0200 5/20/05, Karl Koch wrote:

basICColor display uses a unique technique in calibrating monitors. If you have a "hardware-calibratable" monitor like the EIZO CG21, display will first measure the tonal response curve, calculate a correction curve and load it into the monitor. Then display measures the corrected values again and iterates until the deltaE values are as small as possible.
In the case of the CG21, display can only do a tonal response correction, not a gray balance in the hardware of the monitor, since the CG21 has only 1 LUT for all three channels, R,G and B. The successor, CG210, has 3 LUTs.
If display detects only one LUT, it corrects the gray balance on the graphics card, in addition to the tonal response calibration in the monitor. If it detects 3 LUTs in the monitor, you will see a straight line in the vcgt and thus in your video card.
So, it´s not a bug, it´s a feature! basICColor display generates the most accurate calibration possible.

I found that my CG21 always had a pink cast until I used BasICColor. I'd tried Color Navigator with both the i1 colorimeter and spectro, I'd tried calibrating with Color Navigator then using Monaco OPTIX to build the profile, and various other combinations, but whatever I tried the CG21 was always pink compared to the Arisan sitting beside it. BasICColor wth the X-Rite instrument nailed it first try.

It is indeed a feature, and a good one!
--
email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/colorsync-users/email@hidden

This email sent to email@hidden
References: 
 >BasICColor and "vcgt" tag (From: Karl Koch <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.