option "verbose" v "Verbose" flag off
option "input" i "Input landmarks filename" string yes
-option "matrix" m "Input 4x4 matrix filename ('.mat' file)" string yes
+option "matrix" m "Input 4x4 matrix filename ('.mat' file)" string no
+option "spacing" s "If given, applies the given spacing (x,y,z) to the input points." double no multiple default="1"
+option "output" o "Output landmarks filename" string yes
+option "type" t "Landmarks type ('pts' for Jef; 'txt' for VV ; 'vtk' for vtk meshes)" string no default="txt"