option "config" - "Config file" string no
option "verbose" v "Verbose" flag off
+option "imagetypes" - "Display allowed image types" flag off
+
option "input" i "Input image filename" string yes
option "output" o "Output image filename" string yes
option "lower" l "Lower intensity (default=min)" double no
option "upper" u "Upper intensity (default=max)" double no
-option "inside" - "Inside value" double no default="1"
-option "outside" - "Outside value" double no default="0"
+option "fg" - "Foreground (FG) value" double no default="1"
+option "bg" - "Background (BG) value" double no default="0"
+option "setBG" - "No FG, keep values from input" flag off
+option "setFG" - "No BG, keep values from input" flag off
+