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