CIScreenBlendMode - emcconville/cif GitHub Wiki

CIScreenBlendMode

Multiplies the inverse of the source image samples with the inverse of the background image samples. This results in colors that are at least as light as either of the two contributing sample colors.

• -inputImage <image> : The image to use as an input image. For filters that also use a background image, this is the foreground image.
• -inputBackgroundImage <image> : The image to use as a background image.