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petopeto said:
Levelling by hand can be very difficult. Using an IT8.7/2 target (such as from http://www.targets.coloraid.de, R1, $20 shipped) can do this accurately, giving exact colors instead of having to do it by eye. (If you have a good eye, it might not be necessary, but it's cheap and also eliminates errors due to monitor error.)
haha, I simply give up to adjust colors :p
My scanner, and sRGBprofile didn't work well. so I adjust white/black point only, didn't touch gammas,curves,etc.
Maybe gammas of my scans are a bit high, so they must need to be fixed.

Cyberbeing said:
My attempt: post #51966
It seems to be applyed something like color convert or tone curve, isn't it?