Obtaining a gamma of 2.15 instead of 2.2

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This topic contains 5 replies, has 2 voices, and was last updated by  Cubox (@cubox) 3 weeks, 5 days ago.

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  • #20583

    Cubox (@cubox)
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    Hi,

    After calibration, using “report on a calibrated device” shows a gamma of 2.15. Should it be closer to 2.2, since that’s what I used for the tone curve?

    My uncalibrated gamma is 2.3, but I assumed it would be better to keep using 2.2.

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    #20637

    Florian Höch (@fhoech)
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    Go to the verification tab and run a full report. The average gamma via “report on calibrated device” only takes into account the 1D calibration.

    #20640

    Cubox (@cubox)
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    Hi,

    I have included the full report done after calibration.

    On the gamma curve, the measured gamma is always lower than nominal.

    There is also a gamma average of 1.13 (1.15 median) when showing additional statistics.

    Given my low knowledge into this, I am assuming that the reported gamma value is wrong. However, if I’m wrong, let me know.

    Thanks for the reply,

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    #20643

    Cubox (@cubox)
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    In addition, since I’m using a TN display, I am assuming that the big “NOT OK” for Maximum ΔE*00 is normal, since it cannot reach true black.

    #20646

    Florian Höch (@fhoech)
    Administrator
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    It looks like the display has drifted a bit since it was calibrated & profiled, but still seems ok.

    I am assuming that the big “NOT OK” for Maximum ΔE*00 is normal, since it cannot reach true black.

    Yes, this is normal for displays with poor black level and/or poor black neutrality (you can correct for the latter using calibration black hue correction, at the expense of contrast). In your case since you are aiming for a very warm whitepoint, the effect is exacerbated.

    #20655

    Cubox (@cubox)
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    I ran the verification just after calibration.

    Calibration was on 17th, 16h29.  Verification was at 21h the same day

    It’s not the best screen for colour accuracy, but still…

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