[argyllcms] Contrast vs Brightness on my LCD monitor and related questions
- From: Leonard Evens <len@xxxxxxxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 05 Dec 2008 11:10:51 -0600
I have a Samsung 226CW LCD monitor which I'm trying to calibrate using
argylkl version 1.03. (Last year I managed to do it with version 0.8,
but I can't remember what I did, and the monitor is much to dim with the
old settings.)
There are controls for Brightness and Contrast. I am trying to figure
out just what they are doing. Does either set the light level from the
light source? Or do both just manipulate the monitor's internal LUT?
dispcal -v -o -yl ..., white level (option 3) tells me to set LCD
brightness, but either of them changes what is reported as the white
level in cd/m^2. If I use Brightness to set the white level, what
should I use contrast for?
Aside from someone just knowing the answer, is there some way I can use
the argyll programs to investigate the matter.
Also, remind me which of the options under dispcal it makes sense to
adjust. I have color controls, so I can use either option 2 or 4, but
it wouldn't make sense to do both, since there is only one set of
controls. If I remember correctly, I can only use option 4 if there are
separate monitor controls for setting the black point.
I once thought I understood all this, but this time it doesn't seem to
be working properly.
I know that previously under Fedora 7, I couldn't set X to store the
monitor profile, but it may be possible now. Any hints about how to
investigate that.
--
Leonard Evens <len@xxxxxxxxxxxxxxxxxxxxx>
Mathematics Department, Northwestern University
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