Understanding results

[SilviuT]

Hello,

I have troubel understanding the results of my calibration with different correction profiles.

I have a ColorMunki Display and a Dell S2417DG.

Target whitepointis 6500K. And I am using the extended chart for verification. These are the results with various correction profiles:

With the Correction set to None:

Measured vs. assumed target whitepoint  0.23
Measured vs. display profile whitepoint  0.1
Average ΔE 0.33
Maximum ΔE 1.09
Gamut volume 1.085
Gamut coverage sRGB 94.1%
Gamut coverage DCI-p3 75.96%
Gamut coverage AdobeRGB 69%

With Correction set to LCD White LED IPS:

Measured vs. assumed target whitepoint ΔE*00 0.48
Measured vs. display profile whitepoint ΔE*00 0.46
Average ΔE*00 0.96
Maximum ΔE*00 1.74
Gamut volume 1.089
Gamut coverage sRGB 94.67%
Gamut coverage DCI-p3 75.98%
Gamut coverage AdobeRGB 69.3%

With Correction set to Matrix: i1 Display Pro <…> by 4KM v2 (https://colorimetercorrections.displaycal.net/?get&type=ccmx&manufacturer_id=DEL&display=Dell%20S2417DG&instrument=i1%20DisplayPro%2C%20ColorMunki%20Display&html=1):

Measured vs. assumed target whitepoint ΔE*00 0.66
Measured vs. display profile whitepoint ΔE*00 0.44
Average ΔE*00 0.89
Maximum ΔE*00 1.62
Gamut volume 1.0723
Gamut coverage sRGB 93.66%
Gamut coverage DCI-p3 75.39%
Gamut coverage AdobeRGB 68.55%

To me it seems that the calibration with the correction profiles is far worst than with None. Am I reading this wrong?

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[Florian Höch]

Hi,

you have to use the exact same colorimeter correction during verification that was used to calibrate & profile. Have you done that?

[SilviuT]

Probably not. Was it under the device link profile? That thing only accepts ICC and icm profiles. The correction on Display & instrument I never change after a calibration. I also do the verification immediately after calibration.

[SilviuT]

Can you please explain how can I check what colorimeter correction is being used during verification?

[Florian Höch]

Can you please explain how can I check what colorimeter correction is being used during verification?

You set the colorimeter correction on the “Display & instrument” tab. If you select an existing profile under “Settings”, it will automatically set the correction that was used for the profile.

You can see which correction was used in the report as well.

[SilviuT]

Ok, I checked the reports, and yes, during the verification I had the exact same colourimeter correction as during the calibration.

So does this mean that the calibration without any colourimeter correction is better than the other two?

• This reply was modified 5 years, 3 months ago by SilviuT.

[Florian Höch]

So does this mean that the calibration without any colourimeter correction is better than the other two?

It seems so, although this is a very peculiar result.

[SilviuT]

Thank you very much! Could it be an indication of a possible bug? If you think so, I will open another thread. Otherwise, we will leave it as is.

[Florian Höch]

Thank you very much! Could it be an indication of a possible bug?

No.

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