gs-image-conversion/full-color/scripts/slicer.sh
2017-05-26 12:13:50 -05:00

30 lines
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#!/bin/bash
IMAGE=$1 # ./something/foo.png
IMAGEBASE=$(basename $IMAGE) # foo.png
IMAGEBASENOEXT=${IMAGEBASE%%.*} # foo
OUTBASE=out
OUTDIR=$OUTBASE/$IMAGEBASENOEXT
mkdir -p $OUTDIR
# start with RGB, so from 200 vertical pixels divided by 3 colors = 320x66.6 (we'll do 67 and remove extras)
# also, we don't reduce colors yet, because we need 67 full-color lines to split into three separate
# 4-bpc (12bit color) lines to composite at the end
convert -resize 320x67\! -crop 320x1 $IMAGE $OUTDIR/$IMAGEBASENOEXT-%03d.full.png
for file in `ls $OUTDIR/$IMAGEBASENOEXT*.full.png`;
do
echo Working on splice: $file
filebase=$(basename $file)
filebasenoext=${filebase%%.*}
dither=Riemersma
convert -channel Green,Blue -evaluate set 0 +channel -colors 16 -depth 12 -dither $dither $file $OUTDIR/$filebasenoext.gs.0-R.png
convert -channel Red,Blue -evaluate set 0 +channel -colors 16 -depth 12 -dither $dither $file $OUTDIR/$filebasenoext.gs.1-G.png
convert -channel Red,Green -evaluate set 0 +channel -colors 16 -depth 12 -dither $dither $file $OUTDIR/$filebasenoext.gs.2-B.png
done
convert -append $OUTDIR/$IMAGEBASENOEXT*gs* $OUTDIR/$IMAGEBASENOEXT-FINAL.png
convert -crop 320x200 $OUTDIR/$IMAGEBASENOEXT-FINAL.png $OUTBASE/$IMAGEBASENOEXT-FINAL-APPX.png