#! /bin/bash
# This script tests: ppmbrighten
# Also requires: 

  alias ppmbrighten="${PBM_TESTPREFIX}ppmbrighten"
  shopt -s expand_aliases

ppmbrighten -v 100 testimg.ppm | cksum
ppmbrighten -v 100 -normalize testimg.ppm | cksum
ppmbrighten -s 100 -v -50 testimg.ppm | cksum