Re: White point for LCD.
Re: White point for LCD.
- Subject: Re: White point for LCD.
- From: Karl Koch <email@hidden>
- Date: Wed, 18 May 2005 21:57:58 +0200
Am 18.05.2005 um 21:13 schrieb Andrew Rodney:
clip..
Physically, using the monitor RGB controls
...clip
I don't know. However, the Eye-one, and my lying eyes, report that it
is
indeed changing color. I am using the "pre-calibration" procedure in
GM
4.15.
I'm not arguing that you're not changing colors. The important fact is
how
are you doing it? If you're altering the LUT to the graphic card with
8-bits
of data, you're introducing aliasing which isn't good. This isn't the
case
when you physically adjust the behavior of the display as you can do
with
some CRTs.
Mark, Andrew,
how would you change a graphics board LUT, by adjusting color
temperature using the monitor RGB controls?
Most LCD monitors (I mean MONITORS, not junk) have RGB controls that
change internal LUTs in the monitor which normally are 10 bits or
more. These controls "simulate" the gains on a CRT. Being more than 8
bits they do not reduce quality like 8 it LUTs on a graphics card
would. So, it´s save (or even preferable) to use these controls before
software-calibrating the monitor.
High-end monitors have more than one set of LUTs and can be
"hardware-calibrated" through the DDC-CI or proprietary protocols with
the appropriate software. The "gains" are set on one group of LUTs, the
tonal response curve and gray balance on a second one. This guarantees
the highes quality calibartion you can get - no banding, lowest Detas.
EIZO just announced the CG210 that has these capabilities, calculating
color in 14 bits accuracy. And basICColor display is the first and so
far only third party software that uses this capability to it´s full
extent.
Karl
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden