gammawarp(6D)

NAME
     gammawarp - lighten or darken an image

SYNOPSIS
     gammawarp inimage outimage gamma

DESCRIPTION
     gammawarp lightens or darkens an image by changing the gamma. A gamma
     value that is less than 1.0 will lighten grey tones, while a gamma value
     that is greater that 1.0 will darken grey tones.

SEE ALSO
     gamcal(6D), gamma(6D)