Calibration Web report shows low contrast ratio for TN monitor

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  • #701

    anonymous SourceForge
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    Hi

    I’ve lost my login details unfortunately and have been waiting 30 mins after I requested a password reset and it still hasn’t come through.

    I’ve created a Google Docs page explaining my problem with pics (including my web report) could someone please look through and see if it is okay and answer the questions at the end please? I am a novice to all of this so have included as much detail as possible.

    https://docs.google.com/document/d/1ftMcoQmEk2DmZYh1029YVWDkQ-sVIzODQ4lsjL0iK-E/edit?usp=sharing

    Thank you

    #702

    Florian Höch
    Administrator
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    Hi,

    I am very much new to this but my Calibration Web report shows low contrast ratio for my monitor when it has a ratio of 50K:1

    That’s a TN panel, so the static contrast certainly isn’t 50000:1 because that’s not possible with that display technology. Very good plasma TVs may be able to achieve close to this. Your display is rated at around 1100:1 static contrast uncalibrated (which is fairly good for TN panel), but calibrated contrast is only around half of that which matches your measurement report.

    Correction used: I could not find the one for my monitor therefore used Asus VG278HE from the list. Should I not have used this?

    Use the the LCD White LED spectral correction instead.

    I installed the Argyll drivers that came with Argyll_V1.7.0_win64_exe. I could not find one for my device as Windows automatically assigned a generic one therefore I used the Argyll set.

    The i1 DisplayPro, ColorMunki Display doesn’t need a specific driver.

    What settings should I use for my TN screen?

    The “Office & web” preset is the go-to preset if you’re unsure.

    Calibrite Display Pro HL on Amazon  
    Disclosure: As an Amazon Associate I earn from qualifying purchases.

    #703

    anonymous SourceForge
    Member
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    Thanks Florian

    I will use those settings and report back after rolling back my driver and using the default ones with a restart.

    Does it matter which test chart I use under the Profiling section?

    #704

    Florian Höch
    Administrator
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    Does it matter which test chart I use under the Profiling section?

    Use the preset defaults.

    #705

    anonymous SourceForge
    Member
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    All done using:
    – Correction: Spectral LCD White LED IPS (WLED AC LG Samsung).
    – Office and Web (D65, gamma 2.2)
    – Testchart Office & Web (D65, Gamma 2.2)

    Whilst my contrast ratio has improved to 603.4:1 from 565.3:1 the Maximum DeltaE*00 is now showing as “NOT OK”.

    I have attached a link to the latest Web Report

    https://drive.google.com/file/d/1DzmkXdpPOQhQW-3YYoe70WXtR_JeVnEE1izPewsma0o5CxydQVIYwTpy0ZqSC95ILUQ3m0J-UQuI8Bll/view?usp=sharing

    #706

    anonymous SourceForge
    Member
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    Oh and one more question please.

    I’d like to lend my friend my i1 display pro to calibrate his panel. The measurement report in displaycalgui only shows after you’ve calibrated the screen, is there a way to generate one pre-calibration so he can see the before and after results please?

    I’ve had a look under the Tools menu and there is report on calibrated and uncalibrated display device but they unfortunately don’t generate html reports.

    #707

    Florian Höch
    Administrator
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    is there a way to generate one pre-calibration so he can see the before and after results please?

    Depends on what you’re after. If you want to compare against a set standard, then you could do that, but note the report you’ve attached is a closed loop test.

    #708

    anonymous SourceForge
    Member
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    I don’t understand what you mean by closed loop test. The report is what is generated at the validation section. Where it shows Maximum Delta as Not Ok is that nothing to worry about? Red blood in games appear pinkish.

    Thank you

    #709

    Florian Höch
    Administrator
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    I don’t understand what you mean by closed loop test.

    What I meant is it’s a test of the profile accuracy.

    Where it shows Maximum Delta as Not Ok is that nothing to worry about?

    Depends on wether you’re willing to wait longer for taking more measurements, which will in turn increase profiling accuracy. E.g. for a higher accuracy profile, set testchart to “Auto” and adjust the patch amount slider.

    Red blood in games appear pinkish.

    Games don’t make use of ICC profiles, so color correction in games is limited what is achievable via the 1D LUT video card calibration. 1D calibration only affects whitepoint and gray balance, it cannot correct colors.

    #710

    anonymous SourceForge
    Member
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    Thanks again Florian,

    I can leave the calibration running overnight so the 4 hours it will take to calibrate won’t be a problem.

    For gaming I use a program called color sustainer which makes use of ICC profile for video games:
    http://forums.guru3d.com/showthread.php?t=386325

    #711

    Florian Höch
    Administrator
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    That program switches between different 1D calibrations on the fly (those are generally stored in a ICC profile’s ‘vcgt’ tag). It doesn’t (and can’t) add ICC color management to games.

    #19948

    anthonyefarr
    Participant
    • Offline

    Hi

    […]

    I’ve created a Google Docs page explaining my problem with pics (including my web report) could someone please look through and see if it is okay and answer the questions at the end please? I am a novice to all of this so have included as much detail as possible.

    https://docs.google.com/document/d/1ftMcoQmEk2DmZYh1029YVWDkQ-sVIzODQ4lsjL0iK-E/edit?usp=sharing

    Thank you

    How did you generate that report? (I’m trying to figure out contrast ratios of my monitors & it’s included in your report.)

    Cheers

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