| 
 |  | 
       ppmhist - print a histogram of a portable pixmap
       ppmhist [ppmfile]
       Reads  a portable pixmap as input.  Generates a histogram of the colors
       in the pixmap.
       ppm(5), pgmhist(1)
       Copyright (C) 1989 by Jef Poskanzer.
                                 03 April 1989                      ppmhist(1)