-option "input" i "Input image filename" string yes
-option "output" o "Output image filename" string yes
-option "lower" l "Lower intensity (default=min), fg is greater than this value" double no
-option "upper" u "Upper intensity (default=max), fg is lower than this value" double no
+option "input" i "Input image filename" string yes
+option "output" o "Output texte filename" string yes
+option "point1" f "First point (mm)" double yes multiple(-4)
+option "point2" s "Second point (mm)" double yes multiple(-4)