28 lines
925 B
Bash
Executable File
28 lines
925 B
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 16 palettes = 320x12.5 (we'll do 13 and remove extras)
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# we'll end up with 13 chunks of 320x13 (last one will be short) that are still full color
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convert -resize 320x200! -crop 320x13 $IMAGE $OUTDIR/$IMAGEBASENOEXT-%03d.band.png
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# reduce each band to a 16 color palette
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for file in `ls $OUTDIR/$IMAGEBASENOEXT*.band.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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dither=FloydSteinberg
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convert -colors 16 -depth 4 -dither $dither $file $OUTDIR/$filebasenoext.band16.png
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done
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convert -append $OUTDIR/$IMAGEBASENOEXT*band16* $OUTBASE/$IMAGEBASENOEXT-FINAL.png
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