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pnmgamma - perform gamma correction on a portable anymap
pnmgamma
value [pnmfile]
pnmgamma redvalue greenvalue bluevalue [pnmfile]
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.
pnm(5)
Copyright (C) 1991 by Bill Davidson and
Jef Poskanzer.
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