Online Help:

Usage: /vol/vssp/local/trees/amma-4/linux/bin/Intensity [options] 
   -optload () [] Load options from a file.  
   -optsave () [] Save options to a file.  
   -byte () [] Input BYTE(PNM) image
   -int () [] Input INT image
   -real () [] Intput DOUBLE image
   -o (int) [int] Output file names
   -d (FALSE) [FALSE] save result as double image
   -w (9) [9] Window size 
   -help (TRUE) [FALSE] Print usage information.