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Virgil (70 BC - 19 BC)

Gamma

Gamma is the exponent in a power-law relationship between video or pixel values and the displayed brightness. Each pixel in a digital image has a certain level of brightness ranging from black (0) to white (1). These pixel values serve as the input for your computer monitor. Due to technical limitations, CRT monitors output these values in a nonlinear way: Output = Input gamma 

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