remove "required" for flag 'mode'

diff --git a/tools/clitkBinarizeImage.ggo b/tools/clitkBinarizeImage.ggo
index 6f9954882fb0eea73a3f1e47966307b34405f4b5..c99af0fa738f16337211088ed10da8cf5f74ea06 100644 (file)
--- a/tools/clitkBinarizeImage.ggo
+++ b/tools/clitkBinarizeImage.ggo
@@ -14,5 +14,6 @@ option "upper"        u       "Upper intensity (default=max), fg is lower than this va
 
 option "fg"                    -       "Foreground (FG) or 'inside' value"               double        no      default="1"
 option "bg"                    -       "Background (BG) or 'ouside' value"               double        no      default="0"
-option "mode"          -       "Use FG and/or BG values (if FG, the BG is replaced by the input image values)" values="FG","BG","both"  default="both" required
+option "mode"          -       "Use FG and/or BG values (if FG, the BG is replaced by the input image values)" values="FG","BG","both"  default="both"
+