Re: Udo does it again...

[CDTobie@aol.com]

In a message dated 2/12/02 1:48:51 PM, udo.machiels@freeuk.com writes:

>> I am not getting it and I am starting to think it might be me!
>> 
>> So far I have been given lots of links and have heard from some very
>well
>> meaning folks. I still don't have a clear picture about even where to
>start.
>> I have run the gamma thing on my monitor and now I hear from some who
>tell
>> me that your gamma means very little. I also hear that you need 1.8 gamma
>> and someone else says you need 2.2 gamma.
>
>Basically, the lower the gamma setting, the lower the contrast.
>I heard that this is not really working with color vision monitor
>calibration software, but is very visible with the GretagMacbeth software.
>Click on a different gamma setting and see the monitor contrast changing.
>And there are people who even say, that you won't see a difference, yes,but
>I say that probably because the software does not do the job properly.
 
You are missing a basic concept of color management here Udo... if you 
calibrate twin monitors side by side to gammas of 1.8 and 2.2  (this is not 
just theory, I've done this many times) and look at the same image in 
Photoshop on both of them, then they will look virtually identical. This is 
because the two profiles you have just created have different gamma tags in 
them, and Photoshop will correct to each of them from the gamma of the 
workingspace. This should be true with monitor profiles from any software, 
though there was a recent release of ColorVision software that had a bug, and 
built all profiles with the same gamma, even when you asked for a different 
one. That might account for your experience. If so download the dot upgrade 
to fix this. Now, if you look at images in a non-color savvy application on 
those two monitors then yes, the results will look different. But judging 
color in an application that does not use profiles properly is a fools errand.

C. David Tobie
Design Cooperative
CDTobie@designcoop.com
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