#! /bin/bash
# This script tests: pamditherbw
# Also requires: pamchannel pamtopnm


tmpdir=${tmpdir:-/tmp}
test_red=${tmpdir}/testimg.red

# Test 1.  Simple threshold
pamchannel -infile=testimg.ppm -tupletype="GRAYSCALE" 0 | pamtopnm | \
  tee ${test_red} | \
  pamditherbw -threshold -val=0.5 | cksum

# Test 2.  Floyd-Steinberg
#pamditherbw -floyd -val=0.5 ${test_red} | cksum

# Test 3. Atkinson
#pamditherbw -atkinson -val=0.5 ${test_red} | cksum

# Test 4. Hilbert
pamditherbw -hilbert ${test_red} | cksum

# Test 5. Dither-8
pamditherbw -dither8 ${test_red} | cksum

# Test 6. Cluster4
pamditherbw -cluster4 ${test_red} | cksum

# Test 7. Atkinson
#pamditherbw -atkinson -val=0.5 ${test_red} | cksum

rm ${test_red}