Optional
channelsOptional
gammaSpecifies the shape of the curve connecting the two points.
Optional
inputInput upper bound.
Optional
inputInput lower bound.
Optional
outImage to which to output.
Optional
outputOutput upper bound.
Optional
outputoutput lower bound.
Specify which channels should be processed. To process the alpha as well, specify the channels as [0,1,2,3] for RGBA images and [0,1] for GREYA.