adding horizontal band converter

full-color/tests/run_1.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # run from parent dir "./tests/run_1.sh"
-for i in lion.jpg painting-swirl.jpg pink-cosmos.jpg radiant-color.jpg ;
+for i in `ls ../sample_images`
 do
     ./scripts/slicer.sh ../sample_images/$i
 done

horizontal-band-color/scripts/slicer.sh

@@ -0,0 +1,27 @@
+#!/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 16 palettes = 320x12.5 (we'll do 13 and remove extras)
+# we'll end up with 13 chunks of 320x13 (last one will be short) that are still full color
+convert -resize 320x200! -crop 320x13 $IMAGE $OUTDIR/$IMAGEBASENOEXT-%03d.band.png
+
+# reduce each band to a 16 color palette
+for file in `ls $OUTDIR/$IMAGEBASENOEXT*.band.png`;
+do
+    echo Working on splice:  $file
+    filebase=$(basename $file)
+    filebasenoext=${filebase%%.*}
+    dither=Riemersma
+    dither=FloydSteinberg
+    convert -colors 16 -depth 12 -dither $dither $file $OUTDIR/$filebasenoext.band16.png
+done
+
+convert -append $OUTDIR/$IMAGEBASENOEXT*band16* $OUTBASE/$IMAGEBASENOEXT-FINAL.png

horizontal-band-color/tests/run_1.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+# run from parent dir "./tests/run_1.sh"
+for i in `ls ../sample_images`
+do
+    ./scripts/slicer.sh ../sample_images/$i
+done