Re: Eizo Calibration/basICColor with GAMMA L*
Re: Eizo Calibration/basICColor with GAMMA L*
- Subject: Re: Eizo Calibration/basICColor with GAMMA L*
- From: Marco Ugolini <email@hidden>
- Date: Tue, 17 May 2005 14:55:09 -0700
In a message dated Tue, 17 May 2005 15:05:28, Andrew Rodney wrote:
> On 5/17/05 3:00 PM, "Marco Ugolini" wrote:
>
>> Yes, but are you saying that it makes no difference at what brightness or
>> contrast level you measure that display's white point?
>
> White point determines the color of white, luminance is the intensity. So
> you have two different target aim points here...
>
>> And what about the
>> R-G-B controls in many CRTs? Those MUST affect the white point too.
>
> Yes but no such controls exist on LCDs.
Let me see if I understand this, then:
When it comes to measuring a display's white point, it does not matter what
the luminance is, or the contrast, or what profile is driving the display:
the white point remains the same.
Is that a fair summation? It seems untenable at face value: when I calibrate
a monitor I am able to set a white point as well, and, hopefully, it changes
according to my instructions. So how is it that one can measure a generic
"white point" when in actuality it can be made to change?
Or are we talking here of an uncalibrated and unprofiled white point such as
what appears at the beginning of a calibration/profiling routine? (That
would be the "native" white point, I guess, with perfectly linear LUT curves
in the vcgt tab)
Oh, how quickly even the smallest things can become confusing...
--------------
Marco Ugolini
Mill Valley, CA
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