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cche

I read about some articles about the gamma value and they seem to use 2.2?

motoole2

@cche The exact value for gamma depends on the monitor. If the goal is for your monitor to emit light intensity that is proportional to the digital number passed as input, then the gamma value needs to be tuned to your specific device. So a gamma of either 2.5 and 2.2 might be appropriate---it depends on your device.

Also, there is a similar nonlinear relationship between the input and output of different devices: LCD monitors, different types of projectors, cameras, etc. Compensating for this nonlinear mapping from input to output (e.g., the light incident on a camera sensor, and the pixel values produced in response) is important for many applications.