-option "boundingBox" b "Bounding box of the crop region" int no multiple
-option "lower" l "Size of the lower crop region" int no multiple
-option "upper" u "Size of the upper crop region" int no multiple
+option "boundingBox" b "Bounding box of the crop region (in 3D: =x1,x2,y1,y2,z1,z2)" int no multiple
+option "lower" l "Size of the lower crop region (multiple values)" int no multiple
+option "upper" u "Size of the upper crop region (multiple values)" int no multiple