LookupHSV Function
This node performs exactly like Lookup, except it works on the HSV channels instead of RGB channels.
image LookupHSV( image, float expression hExpr, float expression sExpr, float expression vExpr, float expression aExpr );
image = Lookup( image, hExpr, sExpr, vExpr, aExpr);
shake -lookup "hExpr" "sExpr" "vExpr" "aExpr" |