Gamma 2.2 to gamma 1.0

[tinmartin]

Hello,

For visual perception research concerns I would like to linearize my monitor (ASUS vg279qm) color profile. I would like to pass from 2.2 gamma to 1.0. Does DisplayCal allow this?

I’m using DisplayCal with a Datacolor Spyder4Pro display calibration system.

Thanks.

[Vincent]

a) set gamma to 1

b) choose existing calibration for gamma x.x, open “.cal” file. De-gamma values here. Back to .cal, load them manually. This way you can compute 2 o 3 gammas and load them fast

[tinmartin]

Thanks for your reply but I’m afraid I don’t get what you mean. I only found two “.cal” files called test.cal and linear.cal but I can’t do anything with those files.
And then how to de-gamma?

[Vincent]

Thanks for your reply but I’m afraid I don’t get what you mean. I only found two “.cal” files called test.cal and linear.cal but I can’t do anything with those files.

There should be one .cal on each calibration folder. In Windows is in app/Roaming, look for DisplayCAL folder.

And then how to de-gamma?

If you have linear light, so if you double input you get twice output in cd/m2, and you have a 2.2 gamma display you should “gamma encode” it before sending, actually the inverse power law. That should be a hint. Multiply each value in .cal for equivalent de gamma value for that input.

Or just do full calibration to 1.0 if you find it easier.

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