Re: Monitor calibration
Re: Monitor calibration
- Subject: Re: Monitor calibration
- From: Roger Breton <email@hidden>
- Date: Thu, 18 Oct 2001 15:25:59 -0400
Anthony,
You said it, the shadow "appeared" too open. Do you know in actuality the
device-dependent (RGB or CMYK) data remained the same accross the two
monitors or that it varied because of the difference in absolute brightness
between the two monitors? I would venture to say that it should not happen.
We're dealing with pure "apperance", here. Unfortunately, brightness is an
INVARIANT in the ICC world; it's just not taken into consideration for
reasons well far and beyond my scientific color comprehension to date.
But, isn't it odd, Anthony, that your old faithfull PressView at 70 cd/m2
and your Sony at a blazing 120 cd/m2 are both "normalized", internally by
profile makers, to a Y=100 for usage in an ICC workflow?
Absolute brightness should be part of the ICC conceptual framework, I agree.
At least as far as monitor calibratino is concerned. But I am no color
scientist to have an opinion on exactly how feasible and actually desirable
is this from a color reproduction standpoint.
The only thing that comes close to address the problem of "relative" screen
brightness is GretagMacbeth's Monitor Profiler which I hear (but never
directly observed myself perhaps because of the "simplified" user interface
and documentation -- they do not want to reveal too much to user about this)
takes into account "absolute brightness". I am sure Hutchison will agree
with me here. I know Prove it! can also do this but I have not completely
discovered how. I don't think OptiCal does this.
So, should 15 monitors in the same room be set at the same "absolute
brightness" to qualify for "good" color management?
What do you think?
Roger Breton
Laval Qc
>
I run the Sony at 90 cd/m2, however, and have always assumed that the
>
extra brightness would not affect Photoshop editing. However Jack
>
pointed out that the extra brightness might create a situation where
>
shadow detail appeared too open, thus yielding real-world output that was
>
blocked up.
>
>
So in addition to all the other variables mentioned, where does screen
>
brightness fit in?
>
>
Tony
>
>
Anthony R. Sanna
>
Vice-President
>
SACO Foods, Inc.
>
6120 University Avenue
>
Middleton, Wisconsin 53562 USA
>
>
email@hidden
>
www.sacofoods.com
>
>
1-800-373-7226
>
(608) 238-9101
>
(608) 238-8149 - fax