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 correc-
       tion, 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.