comicize scanned handdrawings into curvy vectordrawings (for simple webcomics and such)

comicize

#!/bin/bash 

[[ ! -n "$1" ]] && echo "usage: $0 <image> <outimage> <title> <thickness=200> <whiteoffset=20> <tracetreshold=15> <curvetreshold=4> <zoom=2>" && exit 1
file="$1"
outfile="$2"
title="$3"
thickness="$4"
whiteoffset="$5"
tracetreshold="$6"
curvetreshold="$7"
zoom="$8"
bitmap="$file.bmp"
convert -resize "$thickness" -normalize -level $whiteoffset%,99% "$file" "$bitmap"
cat "$bitmap" | mkbitmap -f "$curvetreshold" -s "$zoom" -t 0.49 | potrace -t "$tracetreshold" -a 1.33 -O 50 -b pgm > "$file.pgm"

convert -fill black -pointsize 14 -gravity South -annotate +0+8 "$title" \
 -fill blue -pointsize 9 -gravity northeast -annotate +0+5 "copyright leon.vankammen.eu" \
 -bordercolor '#555555' -border 2x2 "$file.pgm" "$outfile"
#rm *.bmp *.pbm