--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/mkdjvu.sh	Sun Apr 24 20:43:56 2011 +0200
@@ -0,0 +1,45 @@
+#!/bin/sh -ex
+
+# $1 file.pnm
+# 600 dpi by default.
+
+INPUT=$1
+DPI=190
+OUTPUT=`basename $INPUT .pgm`.djvu
+TMPFILE=/tmp/tempfile
+
+function threshold_mkbitmap
+{
+PPM=$1
+PBM=$2
+mkbitmap -s 1 -o "$PBM" "$PPM"
+}
+
+function threshold_netpbm
+{
+pamditherbw -threshold $1 | pamtopnm >$2
+
+}
+
+function threshold_netpbm2
+{
+pamthreshold -contrast 0.5 -dual=16x16  $1 |pamtopnm > $2
+
+}
+
+if [ $# -ne 1 ]; then
+	echo "usage: $0 <file.pnm>"
+	exit
+fi
+
+pnmnorm < "$INPUT" > "$TMPFILE.ppm"
+threshold_netpbm2 "$TMPFILE.ppm" "$TMPFILE.pbm"
+
+cjb2 -clean -dpi $DPI "$TMPFILE.pbm" "$TMPFILE.djvu"
+
+djvumake "$OUTPUT" PPM="$TMPFILE.ppm" Sjbz="$TMPFILE.djvu"
+
+rm -f "$TMPFILE.pbm"
+rm -f "$TMPFILE.ppm"
+rm -f "$TMPFILE.djvu"
+echo Done: \"$OUTPUT\" created.