67 results about "Gamma correction" patented technology

Gamma correction, or often simply gamma, is a nonlinear operation used to encode and decode luminance or tristimulus values in video or still image systems. Gamma correction is, in the simplest cases, defined by the following power-law expression: Vₒᵤₜ=AVᵢₙγ where the non-negative real input value Vᵢₙ is raised to the power γ and multiplied by the constant A, to get the output value Vₒᵤₜ. In the common case of A = 1, inputs and outputs are typically in the range 0–1.