-option "operation" t "Type of operation : \n With another image : 0=add, 1=multiply (dotproduct), 7=difference, 9=crossproduct\n; For 'scalar' : 0=add, 1=multiply, 5=absval (magnitude), 6=squared magnitude, 11=divide, 12=normalize" int default="0" no
+option "operation" t "Type of operation : \n With another image : 0=add, 1=multiply, 2=dotproduct, 7=difference, 9=crossproduct\n; For 'scalar' : 0=add, 1=multiply, 5=absval (magnitude), 6=squared magnitude, 11=divide, 12=normalize" int default="0" no