From 9c757d3063751e5f907c86241edfc1efa59bc6f4 Mon Sep 17 00:00:00 2001
From: Daniel Axtens <dja@ucc.asn.au>
Date: Mon, 28 Mar 2011 13:43:10 +0800
Subject: [PATCH 1/1] initial

---
 scan2pages.sh | 129 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100755 scan2pages.sh

diff --git a/scan2pages.sh b/scan2pages.sh
new file mode 100755
index 0000000..12f5670
--- /dev/null
+++ b/scan2pages.sh
@@ -0,0 +1,129 @@
+#!/bin/bash
+
+UNPAPER_PATH="/Users/dja/Applications/unpaper-0.3/"
+PATH=$UNPAPER_PATH:$PATH
+
+function usage {
+cat >&2 << __EOF__ 
+Usage: $0 [-vfpsmut] [-d depth] pdffile outdir
+Convert pdffile - a pdf of scanned facing pages - to a set of images in outdir,
+each with only one page.
+OPTIONS:
+	-v: Be verbose.
+	-d depth: Use given depth. Default is 1. Unpaper can only handle up to 8.
+	-s: skip masking/trimming. Overrides -m.
+	-f: Forceably redo everything.
+	-p: Forceably redo pdf conversion. Implies options below, equivalent to -f.
+	-m: Forceably redo masking/trimming and other preprocessing. Impiles options below.
+	-u: Forceably redo unpaper processing. Implies option below. IGNORED
+	-t: Forceably redo final trimming and cleaning. IGNORED
+__EOF__
+}
+
+
+# process for -f flag to forceably redo all conversions
+forcepdf=
+forcemask=
+forceunpaper=
+forceclean=
+convertflags=
+unpaperflags=
+depthflags="-depth 1"
+skipmask=
+while getopts 'vd:sfpmuc' OPTION
+do
+	case $OPTION in
+	v)  convertflags="$convertflags -verbose"
+		unpaperflags="$unpaperflags -v --time"
+		;;
+	d)	depthflags="-depth $OPTARG"
+		;;
+	s)	skipmask=1;
+		;;
+	f)	forcepdf=1; forcemask=1; forceunpaper=1; forceclean=1
+		;;
+	p)	forcepdf=1; forcemask=1; forceunpaper=1; forceclean=1
+		;;
+	m)	forcemask=1; forceunpaper=1; forceclean=1
+		;;
+	u)	forceunpaper=1; forceclean=1
+		;;
+	t)	forceclean=1
+		;;
+#	b)	bflag=1
+#		bval="$OPTARG"
+#		;;
+	?)	usage
+		exit 2
+		;;
+	esac
+done
+shift $(($OPTIND - 1))
+
+# check we have an input and output!
+if [[ $# != 2 ]]; then
+	echo "Wrong number of parameters (2 required, $# given: [$@])" >&2
+	usage
+	exit 2
+fi
+
+file=$1
+dir=$2
+
+filedir=$(dirname $1)
+base=$(basename $1 .pdf)
+
+# make the output dir
+mkdir -p $dir
+
+# figure out the number of pages
+dscname=$dir/${base}.dsc
+pdf2dsc $file $dscname || exit 1
+pages=$(awk '$1 ~ "%%Pages" {print $2}' $dscname)
+echo "Got $pages page(s)."
+rm $dscname
+
+# process pages 1 by 1 to avoid convert gobbling all the memory
+for pg in `jot - 1 $pages`; do
+	echo "Processing page $pg."
+	
+	pgn=$(printf '%03d' $pg)
+	
+	# convert from pdf
+	origpnm=$dir/pg-${pgn}.pnm
+	if [[ ! $([ -e $origpnm ]) || $forcepdf ]]; then
+		convert $convertflags $depthflags -density 300 $file[$(expr $pg - 1)] \
+			$origpnm || exit 1
+	fi;
+	
+	# preprocess it!
+	preppnm=$dir/pg-pp-${pgn}.pnm
+	if [[ ! $skipmask && ( ! $([ -e $preppnm ]) || $forcemask ) ]]; then
+		# create mask: 
+		# ... downscale, blur,
+		convert $convertflags -resize 25% -depth 8 -blur 10 $origpnm $dir/pg-mask-${pgn}.pnm ||exit 1
+
+		# ... get crop co-ords
+		cropcords=$(convert -resize 400% -trim -fuzz 90% -format "%wx%h%O" $dir/pg-mask-${pgn}.pnm info: || exit 1)
+		
+		# ... crop and despeckle? the final pre-prepared image
+		convert $convertflags -crop $cropcords $origpnm $preppnm || exit 1
+	elif [[ $skipmask ]]; then
+		cp $origpnm $preppnm
+	fi;
+	
+	#unpaper it
+	#names go a bit funny here
+	#also, ignore flags starting here
+	unppnm=$dir/upg-${pgn}-%01d.pnm
+	unpaper $unpaperflags --layout double --overwrite --no-blackfilter -ni 10 -op 2 $preppnm $unppnm || exit 1
+
+	# final convert and clean
+	convert $convertflags $dir/upg-${pgn}-?.pnm $dir/upg-${pgn}-%01d.tiff || exit 1
+	
+	
+done
+
+mkdir $dir/pages
+mv $dir/upg-*.tiff $dir/pages
+	
-- 
2.20.1