CIGammaAdjust - emcconville/cif GitHub Wiki

CIGammaAdjust

Adjusts midtone brightness. This filter is typically used to compensate for nonlinear effects of displays. Adjusting the gamma effectively changes the slope of the transition between black and white.

• -inputImage <image> : The image to use as an input image. For filters that also use a background image, this is the foreground image.
• -inputPower <number> : A gamma value to use to correct image brightness. The larger the value, the darker the result. [Default 0.75]