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#! /bin/bash
# This script tests: pamditherbw
# Also requires: ppmtopgm
alias pamditherbw="${PBM_TESTPREFIX}pamditherbw"
alias ppmtopgm="${PBM_BINPREFIX}ppmtopgm"
shopt -s expand_aliases
# Make test input
ppmtopgm testimg.ppm >${tmpdir}/testimg.pgm
# Test 1. Simple threshold
pamditherbw -threshold -val=0.5 \
${tmpdir}/testimg.pgm | cksum
# Test 2. Floyd-Steinberg
#pamditherbw -floyd -val=0.5 ${tmpdir}/testimg.pgm | cksum
# Test 3. Atkinson
#pamditherbw -atkinson -val=0.5 ${tmpdir}/testimg.pgm | cksum
# Test 4. Hilbert
pamditherbw -hilbert ${tmpdir}/testimg.pgm | cksum
# Test 5. Dither-8
pamditherbw -dither8 ${tmpdir}/testimg.pgm | cksum
# Test 6. Cluster4
pamditherbw -cluster4 ${tmpdir}/testimg.pgm | cksum
# Test 7. Atkinson
#pamditherbw -atkinson -val=0.5 ${tmpdir}/testimg.pgm | cksum
# Remove test file
rm ${tmpdir}/testimg.pgm
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