pnmgamma

 

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 pnmgamma(1)                                           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.
 
 
 
                          12 January 1991              pnmgamma(1)

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