pnmgamma (1)
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.
"gamma correction"
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
AUTHOR
Copyright (C) 1991 by Bill Davidson and Jef Poskanzer.
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