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when toggle format what by license comment
Apr 3, 2020 at 18:07 comment added Not_Einstein For the greatest accuracy, you don't want to use JPEG images as a nonlinear transfer curve has been applied to the raw data. You want to access the raw image data. Maybe someone can suggest how to do that. Or the above suggestion of using reference cards should work.
Dec 17, 2018 at 8:42 history answered Whit3rd CC BY-SA 4.0