Black Point ICC tag interpretation

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  • #35823

    Roger Breton
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    Digging through DisplayCal-created ICC “profiles” using a tool like ICC Profile Inspector (there are probably better integrated tools in Displaycal to do this? So sorry for reinventing the wheel), in the context of my last post about Black / White Luminance, I could not help notice the difference between actual Black point (RGB = 0 0 0) measurements and the tristimulus values reported in the tag. Please see my attached screen capture but the encoded Black point tag seems awfully “low” compared to the actual measurements, which you can see in the background ti3 file?

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    #35827

    Vincent
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    Digging through DisplayCal-created ICC “profiles” using a tool like ICC Profile Inspector (there are probably better integrated tools in Displaycal to do this? So sorry for reinventing the wheel),

    Profile information application, text with info on the right.

    in the context of my last post about Black / White Luminance, I could not help notice the difference between actual Black point (RGB = 0 0 0) measurements and the tristimulus values reported in the tag. Please see my attached screen capture but the encoded Black point tag seems awfully “low” compared to the actual measurements, which you can see in the background ti3 file?

    CIE XYZ values from ICC profile inspector are normalized to Y=1.0 for white. Check WTPT => all are scaled by 1/100 + aditional black point compensation (black pt idealization) in profile (if any).

    • This reply was modified 1 month, 2 weeks ago by Vincent.
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