Post by k***@public.gmane.orgI'am asking because I have a crushed black problem on my display, so I'm looking for
options that let me controlling mapping black to native monitor black. I have a CM
Photo, and for dispcal combination of switches -yl -k0 and -A3.8 works for me well in
the past (-k0 was default for -yl and I did not defined it).
Now the black problem appears again and as I understand yl is only for colorimeters.
Could you advise me, where are important points?
Is it a dispcal -k0, -A 3.x or dispread (I don'y think so...) or colprof ?
You can't solve a crushed black problem using calibration if the cause
is a mismatch between the black of the source colorspace and the
black level of the display in the CMM.
You need something that will map the black points when the profile
gets used. Mapping the black points is something I would regard as
a perceptual transform, hence it can be solved using the appropriate
gamut mapping options in colprof for perceptual and saturation intents.
If you want to do the same for colorimetric, then you'll have to create
a device link using collink with the appropriate intent choice, or
make use of BPC if the application and/or CMM you are using supports it.
Graeme Gill.