too bright shadows on screen

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  • #137964

    Sedy
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    After countless attempts to calibrate my screens on different computers and with different video cards, I always get  brightest mid and darkest values that do not match the images on other calibrated screens. Since I get good results on one of my computers with the screen calibrated with another monitor manufacturer’s software, I ask which DisplayCal settings have an impact on the intensity of the shadows or gamma. Thanks

    #137965

    Kuba Trybowski
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    What displays do you have?

    #137966

    Sedy
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    Hello and thanks!
    The tests were done with Dell 2208 WFP and Nec PA271Q monitors with two different computers with two different 8 and 10bit video cards.

    #137967

    NoVoicemail
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    can you share verification report

    #137968

    Sedy
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    This verification report is the last one.

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    #137971

    Vincent
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    -Correction none & aiming to D65 (not a custom white) so WP is likely to be wrong. IDNK that monitor if it is old & widegamuyt maybe it is a WG CCFL. PA271Q is WLED PFS.
    -630:1 with actual L* of black point => black point compnesation in Photoshop or other software has to deal with it, bending gamma graph to show most of grayscale without clipping. You may try fake infinite contrast on profile (blackpoint compenstion on profile config) and see if that improves what you see in PS (unlikely, on softproof it will show lighter black)… but 630:1 will be there.
    -3 TRC with mid to severe grey coloration on greys, maybe if display is bad behaved you should aim to  Slow + XYZLUT

    Use ISO 12646:2008 testchart for verification if you wish to keep on eye on  grey calibration. It’s easier to spot issues than with your chart.

    #138260

    Sedy
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    Thanks to all who answered my question a few days ago.
    Since I still cannot get the same results as on other NEC screen calibrated with Sperctra View II program, I am attaching the Display Cal screenshots with hope to have your help. Is there anything I can do to get the equal gamma/brightness on DELL screen and my notebooks as on the NEC?
    Thanks to all.

    • This reply was modified 2 years, 10 months ago by Sedy.
    • This reply was modified 2 years, 10 months ago by Sedy.
    • This reply was modified 2 years, 10 months ago by Sedy.
    • This reply was modified 2 years, 10 months ago by Sedy.
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    #138276

    NoVoicemail
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    can you run a verification in uncalibrated state? For precal, try different osd contrast settings and then take verification report on those in uncalibrated state to check for panel issues. For example, @75 contrast, @70  contrast, etc. Also is your Dell set in standard mode or custom made? On my dell standard mode is gamut clamped with low contrast, try custom mode if you have that.

    #138279

    Vincent
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    Thanks to all who answered my question a few days ago.
    Since I still cannot get the same results as on other NEC screen calibrated with Sperctra View II program, I am attaching the Display Cal screenshots with hope to have your help. Is there anything I can do to get the equal gamma/brightness on DELL screen and my notebooks as on the NEC?
    Thanks to all.

    You are using no correction, there will be a whitepoint error.

    Also as explained previously you have a low contrast display (that old Dell).

    Non color managed there will be a noticeable difference on black, non correctable unless you make your NECs behave as bad as that Dell.

    If white color & brightness are matched or match visually (by chance, youre using no colorimeter correction), and if both display are profiled accurately, when you open a color managed app a grey ramp should track closely from white downwards to some grey value. At some grey value you’ll face Dells limited contrast. That color managed app is going to clip or apply some BPC compensation that lifts those greys till you gte to black on that greyscale ramp. You cant avoid it… unless you make your NEC behave ad bad as that Dell.
    I’d say no way I’m going to make my Nec behave badly because some old Dell monitor… but if you wish to set that limited contrast as target in SV2. Not recomended.

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