option "input" i "Input VF filename" string yes
option "output" o "Output VF filename" string yes
-option "type" t "Type of filter: 0=clitk (fast forward splat using linear kernels), 1= itk (grid subsumpling with controllable precision)" int no default="0"
+option "type" t "Type of filter: 0=clitk (fast forward splat using linear kernels), 1=clitk (like 0, but input images are B-Spline coefficients), 2= itk (grid subsumpling with controllable precision)" int no default="0"
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"