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Gain

In video, the level of white in a video picture; in audio, the loudness of an audio signal.



Gamma

A curve that describes how the middle tones of an image appear. Gamma is a nonlinear function often confused with “brightness” or “contrast.” Changing the value of the gamma affects middle tones while leaving the whites and blacks of the image unaltered. Gamma adjustment is often used to compensate for differences between Macintosh and Windows video cards and displays.




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