Calibrite report wrong?

[cristian]

Hello, thank you for this nice forum, with a lot of information. I have a monitor, and I calibrated it with a new calibrite Display Pro HL, on windows.

After calibration I run the validation with the color checker patches, and I get at first glance very good results, but it seems to me that they are wrong. I am attaching part of the report, and as you can see the b* is totally different between target and measured, but the DE calculated is very low... Do you have any idea of the possible reason?

Thank you

Cristian

[Damien Symonds]

Ignore that nonsense.

Does your screen match your pro lab prints, or not?

[Damien Symonds]

@cristian?

[cristian]

Hello, thanks for the answer. Actually at the moment I am not interested in the prints, but in the numbers. I am doing a scientific research for which I need a calibrated monitor, but I don't know if trusting it or not. I think I will try with another version of the software, or a third part software... I was wondering if other people met this weird behavior

[Damien Symonds]

I think you'd be better to stick with the same software, but try it on a range of screens.

[Damien Symonds]

I think perhaps you misunderstand the purpose of calibration?  Calibration exists BECAUSE screens aren't perfect.  The calibration process finds those deltas (which exist, but are different, for every single screen in the world) and corrects for them.

[cristian]

Thank you again for your answer and effort to think to a possible cause. I agree with you that screens are not perfect, I don't understand why a simple operation as calculating a DE is totally wrong (I tried it on another screen, and also updated to the new calibrite version 2.0, getting again wrong results).

I was curious to see reports from other people to see if those are correct. I am a computer scientist with a scientific approach... numbers are numbers and don't lie (usually!)

[Damien Symonds]

No, the results aren't "wrong".  They just are what they are.  That Delta column is just telling you how far each screen varies from the theoretical target that the ICC has set.