Glossary > Photography >Gamma GammaInformally, a measure of the brightness of mid-level tones in an image. Outside this specification, the term "gamma" is often used as the exponent of a power function that is the transfer function of any stage(s) of an imaging pipeline: output = input ^ gamma where both input and output are scaled to the range 0 to 1. Within this specification, gamma refers specifically to the function from display output to image samples. |
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