SEGMENT Name
      
       SEGMENT Purpose
      
       Set boundaries of constant value to 0.
Category
Calling Sequence
      
       b = segment(a) Inputs
      
       a = input image.     in Keyword Parameters
Outputs
      
       b = output image.    out Common Blocks
Notes
Modification History
      
       R. Sterner. 20 May, 1986. 
      
       RES 22 Oct, 1989 --- converted to SUN. 
  
 Copyright (C) 1986, Johns Hopkins University/Applied Physics Laboratory
  
 This software may be used, copied, or redistributed as long as it is not
  
 sold and this copyright notice is reproduced on each copy made.  This
  
 routine is provided as is without any express or implied warranties
  
 whatsoever.  Other limitations apply as described in the file disclaimer.txt.