Need help with DisplayHDR 400 Monitor HDR 3DLut generate setting.

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  • #13366

    a26905092
    Participant
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    I need say sorry first because my English is bad

    HDR 3DLut off

    https://drive.google.com/file/d/1DY02jyRk0K4AV1S6FtuyiYzvE14d3AX2/view

    https://drive.google.com/file/d/1QXA1NuWL1uzpjmZcNlMZv3xqhyvRpWxq/view

    HDR 3DLut on

    https://drive.google.com/file/d/19IxtEHzViJGhFdY7vsnz4tb6LtdoaPrF/view

    https://drive.google.com/file/d/1nIHT06Zw1swqnm2SanxP9wffwrlGtHkl/view

    Attachment is my setting

    Any help to make it look not so dark?

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    #13387

    Florian Höch
    Administrator
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    Hi,

    you should not use hard clipping, instead, use roll-off. Also, note that setting a mastering display black level to above 0 will clip values below that point, which is why I wouldn’t recommend that either (besides, 0.1 cd/m2 for mastering display black level would be extremely high).

    #13398

    a26905092
    Participant
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    Hello , thanks for reply

    I change the setting like attachment , it is batter but still looking darker they 3DLut off

    Please give me advice

    My monitor is Philips Momentum 328M6FJRMB (peek 425~450 , black 0.12)

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    #13403

    Florian Höch
    Administrator
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    I change the setting like attachment , it is batter but still looking darker they 3DLut off

    The luminance is specified by the given target peak. That it’s brighter with the 3D LUT off doesn’t really matter, because the display without 3D LUT is very likely not accurate at all, so it is not a good point of reference (the original problem you had was also not luminance related, but black crush due to an unsuitable setting for mastering black level).

    From the screenshot, I see you are using luminance preserving perceptual intent. Any specific reason for that?

    #13410

    a26905092
    Participant
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    From the screenshot, I see you are using luminance preserving perceptual intent. Any specific reason for that?

    No specific reason I was testing change this option will make any effect or not , So far it does not take effect

    https://drive.google.com/file/d/1IypgZscLBWUP1oqgtyx3_xF6nqiS5UGa/view?usp=sharing
    https://drive.google.com/file/d/14xJAxqD165u4Dnro7YTq4F8dxQmd47J4/view?usp=sharing

    The cloud near sky area looking like light bule

    And I do try black output 100% still looking like over-saturated and darker

    And I do try

    #13411

    a26905092
    Participant
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    Woops , I forgot to remove the last line.

    #13413

    Florian Höch
    Administrator
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    Which is which in the screenshots? Is this a HDR display?

    #13418

    a26905092
    Participant
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    截圖中的哪個是哪個?這是HDR顯示器嗎?

    Yes , It pass DisplayHDR 400

    Certified Products

    In last replay it is black output 100% and Absolute colorimetric with point scaling

    And left is 3DLut off right is 3DLut on

    • This reply was modified 5 years, 8 months ago by a26905092.
    #13420

    Florian Höch
    Administrator
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    Alright, in that case I don’t think 3D LUT settings are your problem, but that the display employs its own (undefeatable?) tone mapping, and you tried to profile it through said tonemapping. This is fraught with problems, because the display tone mapping may mess up the display response and the profiler will not be able to make sense of it. Ideally, you want to profile the display without any tone mapping or “dynamic” display processing. If you cannot disable the display tonemapping, you have two options:

    • (Recommended) profile the display in non HDR (“SDR”) mode.

    – or –

    • Enable white level drift compensation on the “Display & instrument” tab in DisplayCAL and set patch sequence on the “Profiling” tab to “Maximize lightness difference” and profile the display’s HDR mode.
    #13423

    a26905092
    Participant
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    Alright, in that case I don’t think 3D LUT settings are your problem, but that the display employs its own (undefeatable?) tone mapping, and you tried to profile it through said tonemapping. This is fraught with problems, because the display tone mapping may mess up the display response and the profiler will not be able to make sense of it. Ideally, you want to profile the display without any tone mapping or “dynamic” display processing. If you cannot disable the display tonemapping, you have two options:

    • (Recommended) profile the display in non HDR (“SDR”) mode.

    – or –

    • Enable white level drift compensation on the “Display & instrument” tab in DisplayCAL and set patch sequence on the “Profiling” tab to “Maximize lightness difference” and profile the display’s HDR mode.

    Hello, Thanks for reply

    I try HDR to SDR it work great , But when I try to use the other options it will make 3DLut look like  this

    https://drive.google.com/file/d/1QVlxzNNsYKAYOJcA4BQC1Ev15IdE82hP/view?usp=sharing
    https://drive.google.com/file/d/1mBFxYvqYFcCUJCToJx_2oVOqsISH3npK/view?usp=sharing

    And it also limit SRGB to 98% (from 130%)

    I think it is because DisplayCAL only support SDR contents?

    Or do I do something wrong and make it only do SDR??

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