[argyllcms] Re: Unable to access VideoLUT
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 23 Aug 2016 22:28:58 +1000
nVidia have a proprietary API that is supported under Linux, that allows setting
a variety of color specific things.
It's a toss up whether to attempt to set any of this stuff with ArgyllCMS.
At the end if the day I decided to leave it alone - if the user wants to set
it in a particular way, then they can, and the calibration and profiling
will work through it.
The "digital vibrance" sounds like something
aimed at pretty colors, and not correct ones,
so I think I'm happy that this doesn't seem to
be supported by my card.
Under MSWin their card specific settings ("NVidia control
panel") allows fiddling with the color as an override to anything
else. "Digital vibrance" appears to be a fancy name for a saturation knob.
Personally I set all that to "do nothing" and leave it alone.
As I understand my setup so far, I have at
least 4 LUTs: One in the Eizo monitors which I
need to adjust booting in Windows. A second in
the video card, which is the Video LUT. A third
which is the X11 color map, and a fourth which
would be applied by an application using an ICC
profile (and a fifth, if that application
first had to apply an input profile). This is a
whole lot for me to be confused.
Not really. An application using an ICC profile is
not calibration, it is a profile.
The X11 color map can't be used for color calibration,
since it's application controlled.
The VideoLUT and any in-display LUT have the same function
(calibration), but if you can't access the in-display LUT,
then the VideoLUT is the only option. If you have
access to both, then you would pick one of them.
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