Re: Default colors vs. gamma

[Quentin Mathé]

Le 31 oct. 04, à 21:56, Fred Kiefer a écrit :

> Quentin Mathé wrote:
>
> > 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.

Sorry to be the bad guy here, but… I understood that Alexander was 
saying it was not so dramatic to break the color linearity, but that's 
not your opinion I conclude.

> 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.

ok.

But in the GNOME or KDE cases, is their default gamma support based on 
a CMS, or is their default gamma just a hack which breaks linearity. … 
Last point, long time before ColorSync (the Mac OS CMS) exists, Mac OS 
was using a 1.8 gamma, do you think at this time the linearity was 
broken also because of the non existent CMS ?

Quentin.

--
Quentin Mathé
qmathe@club-internet.fr