3 identifier: movit.saturation
4 title: Saturation (GLSL)
7 creator: Steinar H. Gunderson
13 A simple desaturation/saturation effect. We use the Rec. 709
14 definition of luminance (in linear light, of course) and linearly
15 interpolate between that (saturation=0) and the original signal
16 (saturation=1). Extrapolating that curve further (ie., saturation > 1)
17 gives us increased saturation if so desired.
20 - identifier: saturation