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Thank you very much for taking time out of your busy schedule to help me!
① As shown in the attachment, from left to right are the results of the ICC tone response curves with 0%/50%/100% black output offset with all other parameters under the same control, but I found that the L value corresponding to RGB=0 for all three ICCs is 0.29, why?
Is 0.29 the value of light leakage when my monitor is realistically pure black?
I myself think that only 100% black output offset should correspond to my monitor’s light leakage value, 0% black output offset should be without any black offset, and L should be equal to 0 when RGB=0. I don’t know how to understand this phenomenon!② Regarding the black point correction, I have a preliminary knowledge through Displaycal’s manual.
I understand that the purpose of black point correction is to correct the tonal deviation of the dark part to the target color temperature, but the dark part can not be adjusted too much to the RGB gain, because it will seriously affect the brightness of the dark part of the grayscale balance, but you can also choose the percentage of the black point correction, that is, the strength of the correction, if the 100% (usually choose auto), that is, regardless of the grayscale balance, forced to make the dark part of the color temperature and the target color temperature is equal to the same?And then there is a rate (default 4%), this is to control the tonal response curve from the white point to the black point color temperature offset from the starting point? If 1%, is it a gradual smooth offset from the white point RGB=255 to the black point color temperature, and the higher the percentage value, the closer to the black point this starting point begins?
But I also found that I can set the minimum 0.05, less than 1, what does this mean? It doesn’t seem to be possible to start earlier than the white point at 255, does it?Thanks again for clearing this up for me as a rookie!
Black Point Compensation active => L* for RGB 0 is 0 in TRC, the section in profile where you store how grey ramp behaves. So that section is about display characterization, not about calibration.
Not choosing BPC => profile stores measured black in “.ti3” file. Check what was measured for your displays.
