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Re: Default colors vs. gamma


From: Fred Kiefer
Subject: Re: Default colors vs. gamma
Date: Sun, 31 Oct 2004 21:56:26 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040114

Quentin Mathé wrote:
Le 13 oct. 04, à 01:37, Alexander Malmberg a écrit :

After looking at the mails and #GNUstep discussion, I get this list (if I misplaced or forgot someone, please correct me):

Against:
Dennis Leeuw
Fred Kiefer
Gürkan Sengün
(_maybe_ Adam Fedor, not sure how to read that mail)

For:
Nicolas Roard
Alex Perez [1]
Jeff Teunissen
Riccardo Mottola

Which doesn't really get us anywhere, except that it's now late and I need to sleep. :)

[1] After discussion in #GNUstep, it turned out that Alex's earlier mails here were based on a misunderstanding of what the patch did.


Well to bring back the issue, I would say I'm in the "For" list. Dennis Leeuw has moved to "For" list too I can conclude by reading this last mail on the subject.

In my opinion, it is better to have a somewhat correct default look with a default gamma between 1.6 and 2.2, even if this gamma is wrong, by taking in account you can have it truly right with a default (wrapped by a Preferences panel ideally). Moreover iirc GNOME/KDE uses a 1.6 gamma, Mac OS X a 1.8 gamma and Windows a 2.2 gamma, with such values we can conclude it is reasonable (for color compatibility) to be in this range not at the extreme opposite. Last point, I cannot imagine having a desktop environment which asks a newbie to set its gamma, it is a such complex notion for the everyday user.


Sorry, again a discussion that went a bit strang. The topic as far as I remember was not, if GNUstep will need Gamma correction in some way (which I strongly agree to, but rather as part of full colour management), what was actually discussed was a specific proposal to gamma correct the system colours when creating them from values and this is what I opposed. As Alexander already explained we will be losing the benefit of linearity in colour values, if we apply gamma correction in the GUI. Also correctiong only some of the values may result in a worse effect than correcting none.

To restate this even clearer: I am "For" gamma correction, but against the proposed patch and anything similar to it.

Fred




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