pnmgamma(1)             UNIX System V(12 January 1991)              pnmgamma(1)


NAME
      pnmgamma - perform gamma correction on a portable anymap

SYNOPSIS
      pnmgamma value [pnmfile]
      pnmgamma redvalue greenvalue bluevalue [pnmfile]

DESCRIPTION
      Reads a portable anymap as input.  Performs gamma correction, and
      produces a portable anymap as output.

      The arguments specify what gamma value(s) to use.  A value of 1.0 leaves
      the image alone, less than one darkens it, and greater than one lightens
      it.

SEE ALSO
      pnm(5)

AUTHOR
      Copyright (C) 1991 by Bill Davidson and Jef Poskanzer.


































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