CIColorPosterize - emcconville/cif GitHub Wiki

CIColorPosterize

Remaps red, green, and blue color components to the number of brightness values you specify for each color component. This filter flattens colors to achieve a look similar to that of a silk-screened poster.

• -inputImage <image> : The image to use as an input image. For filters that also use a background image, this is the foreground image.
• -inputLevels <number> : The number of brightness levels to use for each color component. Lower values result in a more extreme poster effect. [Default 6]