Color > Channel Operation

Performs an arithmetic operation on the channels of the opened image. Only applies to color images (i.e. images with multiple channels).

Variables in the operation can be “Auto”, “auto”; “r”, “R”, “red”, or “Red”; “g”, “G”, “green”, or “Green”; “b”, “B”, “blue” or “Blue”; “c1”, “c2”, . . . , “c50”; and “a”, “A”, “alpha”, or “Alpha”. “Auto” eliminates the hue and saturation information while retaining the luminance.

Mathematical operators can be “+”, “-”, “*”, “/”, “^”, “(” and “)”, “[” and “]”, and “~”.

Download a recipe of example channel operations for your color image. An example color image may be downloaded here.

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