HE(9.1)                                                   HE(9.1)

     NAME
          he - histogram equalization

     SYNOPSIS
          fb/he [ input ]

     DESCRIPTION
          He reads a picture file (default standard input) and maps
          its pixel values monotonically to make their histogram as
          even as possible.  The resulting picture file is written to
          standard output.

     SOURCE
          /sys/src/fb/he.c

     SEE ALSO
          picfile(9.6)