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#! /bin/bash
# This script tests: pamscale pamstretch pamstretch-gen
# Also requires: pamfile pamvalidate pnmpsnr
tmpdir=${tmpdir:-/tmp}
stretch_ppm=${tmpdir}/stretch.ppm
width_height=$(pamfile -size testimg.ppm | \
awk '{print "-width="$1, "-height="$2}')
pamstretch-gen 3.96 testimg.ppm | pamvalidate > ${stretch_ppm}
echo 3.96 hermite:
pamscale 3.96 -filter=hermite testimg.ppm | \
pnmpsnr -target1=34.13 -target2=48.95 -target3=42.73 - ${stretch_ppm} || \
echo failure ${PIPESTATUS[@]} ":" $?
pamscale ${width_height} -filter=hermite ${stretch_ppm} | \
pnmpsnr -target1=33.12 -target2=48.59 -target3=42.3 testimg.ppm - || \
echo failure ${PIPESTATUS[@]} ":" $?
rm ${stretch_ppm}
pamstretch-gen 2.75 testimg.ppm | pamvalidate > ${stretch_ppm}
echo 2.75 lanczos:
pamscale 2.75 -filter=lanczos testimg.ppm | \
pnmpsnr -target1=32.93 -target2=48.28 -target3=41.89 - ${stretch_ppm} || \
echo failure ${PIPESTATUS[@]} ":" $?
pamscale ${width_height} -filter=lanczos ${stretch_ppm} | \
pnmpsnr -target1=32.81 -target2=48.43 -target3=41.94 testimg.ppm - || \
echo failure ${PIPESTATUS[@]} ":" $?
rm ${stretch_ppm}
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