option "input1" i "Input1 VF filename" string yes
option "input2" j "Input2 VF filename" string yes
option "output" o "Output VF filename" string yes
-option "type" t "Type of input images (0: DVF, 1: b-spline coefficient images)" int yes default="1"
+option "type" t "Type of input images (0: DVF, 1: b-spline coefficient images)" int no default="1"
option "like" l "Image to read output parameters from (obligatory if type=1)" string no
option "pad" p "Edgepadding value" float multiple no default="0.0"
option "verbose" v "Verbose" flag off