option "threadSafe" - "Clitk: use thread safe algorithm" flag off
option "pad" p "Clitk: edge padding value (1 or N number of values!, defautls to zeros)" double multiple no
option "sampling" s "Itk: subsampling factor" int no default="20"
+option "like" l "Image whose grid (spacing and size) will be used for output" string no