Re-calibrating (updating?) my calibration profile

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  • #13141

    MajesticBeardsman
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    Hello!

    I calibrated my monitor sometime last year and I just found out that monitors can drift over time so I am keen to re-calibrate/update the calibration.

    How do I go about doing this accurately? Do I start fresh; i.e ‘settings’ is currently my previous profile so do I change this to Default Gamma 2.2 or…?

    Also the testchart; this is also currently selected as my previous profile, what do I select this time?

    Many thanks!

    MB

    #13161

    Florian Höch
    Administrator
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    Hi,

    as the old profile is from a year ago, I’d just redo the whole calibration and profile (e.g. with the last profile selected, you can use the previous settings).

    #13168

    MajesticBeardsman
    Participant
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    So once I’ve done re-done the profile, how do I then go about keeping it ‘updated’, if that makes sense? The process for me took a couple of hours (was worth it, my prints came out 100% accurate).

    #13170

    Florian Höch
    Administrator
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    A few hours? What’s the instrument you’re using, and what calibration speed/profiling testchart size?

    #13182

    MajesticBeardsman
    Participant
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    I’m using the Spyder 5 Express with the software downloaded via DisplayCal. I have attached a photo with testcharts etc.

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    #13189

    Florian Höch
    Administrator
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    Spyders aren’t exactly fast. Reducing the amount of patches will definitely reduce the time needed. Calibration speed “fast” and the default number of 175 profiling patches.

    #13200

    MajesticBeardsman
    Participant
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    Will that still give as accurate results?

    #13201

    MajesticBeardsman
    Participant
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    I have a follow up question. I re did the profile from scratch, worked out fine but when I ran the verification tool (I did it twice just for fun) I noticed I got a vastly different results.  See attachments.

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    #13251

    Florian Höch
    Administrator
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    Will that still give as accurate results?

    Not quite, but the difference is probably academic so I wouldn’t worry about it especially with the Spyder.

    I re did the profile from scratch, worked out fine but when I ran the verification tool (I did it twice just for fun) I noticed I got a vastly different results.

    Doesn’t look that different to me (only looking at the overview obviously), average is ~0.6 dE in both cases, and max ~3 vs ~4 on a dark Rec. 709 blue (which is probably slightly out of gamut on your display anyway). The Spyder having a measurement inaccuracy for darker colors of around 1 dE seems in line with its expected performance.

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