XPS 9560 FHD Help

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Viewing 10 posts - 16 through 25 (of 25 total)
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  • #28990

    Алексей Коробов
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    Right. Test mode was wrong. See attachement.

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    #28997

    Sergio Baptista
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    Guys sorry my mistake. Yesterday i was tired.

    See atatched report with no simulation profile.

    Calibration as below:

    •  LCD Hires
    • Black point drift compensation
    • calibration xy whitepoint , CIE 1931 2º
    • gamma 2.2
    • back point correction auto and level 5
    • speed low
    • profilling xyz lut + matrix set to relative colometre and black point compensation
    • profile qualitu high
    • no simulation profile

    NOTE: with the black point correction set to auto and level 5, lost around 10% sRGB colorspace (99% to 90%)

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    #29000

    Vincent
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    • Black point drift compensation
    • back point correction auto and level 5

    Why  do you use that? Use no correction. Loosing contrast for nothing, you end with <200:1.
    Start with defaults, slow or medium speed, your desired whitepoint, 2.2g, single curve matrix+bpc. That’s all. Or if matrix profile is not good enough you can make a XYZLUT from the same grey calibration (or skip maiking a single curve matrix)

    #29001

    Sergio Baptista
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    I ran again the cal from scratch without bk point drift and correction and results are attached  (file named “from scratch xxxx).

    The other file is the report from yesterday.

    Dont understand why the correlated color temp issues.

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    #29006

    Vincent
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    Maybe there is a running app with custom white running on GPU. Look at  profile calibration curves, see what happens on 255 input.Or attach profile.

    #29007

    Sergio Baptista
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    Hope i attached the correct ones 🙂

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    #29012

    Vincent
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    Look at the upper right part. 255 in => 255 out. White is not corrected. It is native white ~6800K CCT and 2dE from whiteness to green or pink side.

    It’s like if you selected as measured/native white for calibration target. If you are fine with that, it’s ok.

    #29013

    Sergio Baptista
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    Yes I got what you’re saying.

    What’s the best way to adjust this?

    This cal was un with whitepoint set to xy coordinates (0.3127 x 0.3290) and whitelevel as measured. Shall i run it again and adjust something here? What do you suggest?

    #29024

    Алексей Коробов
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    Your profile should be usable for color-managed applications, but Paint/Photos/Worktable will show colorized grey scale and white point (WP) is not achieved.  Your calibration curves are bended upward (going above diagonal line), this usually produces wrong WP in DisplayCAL (still not be perfect, but a great program). You need to set lower white level than it realy is to gain correct WP,  try 115cdm setting instead of “measured” 127cdm (or set 127cdm and tune up brightness to ~136cdm). Make 2-3 iterrations to find best level (with highest contrast). 0.3127 x 0.3290 are very close to 6500K coordinates – no need to set it as xy.

    #29040

    Алексей Коробов
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    …~140cdm display brightness for 127cdm setting in calibration tab. – I’ve made little mistake. But, also check videocard LUT with the tool attached (does magenta screen appear when trigerring?). RGB=255 look too strange, curves tips usually move somethere.

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