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saturate - change an image’s saturation
saturate inimage.rgb outimage.rgb
satval
saturate changes the saturation of an image. A satval
of 0.0 will make the image black and white (no color). A satval of 1.0 will
leave the image unchanged. A satval of 2.0 will double the amount of color
in an image.
tobw(6D)
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