Dear Florian, Thank you very much for your answer. The way you described (first calibrate, then profiling with adding same vcgt) works perfect on windows and linux. But for macOS things changes. Once you apply this profile you lost your calibration as system use this profile in color transformation chain. That is main question for me, what is the main idea behind this. And what profiles colorsync developers expect to have installed on the system. Best regards, Vitaly Bondar
Hi,
Am 25.07.2017 um 14:14 schrieb Vitaly Bondar:
The problem that i see here is next. If I have profile built by the display measurements and then add vcgt tag to change color or gamma of the display, then profile is not describing current display state anymore. That's not how it's supposed to be done though. Calibration (which is what may be stored in a profile's 'vcgt' tag and then loaded into the graphics card videoLUT) is the first step, it needs to be active during profile measurements and profile use for the profile to produce the intended result. Changing gamma or other display adjustment parameters after the fact invalidates the profile (in the sense that it'll no longer accurately describe the display response).
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