function usage {
cat >&2 << __EOF__
-Usage: $0 [-vfpsmut] [-d depth] pdffile outdir
+Usage: $0 [-vfpsmutb] [-D DPI] [-d depth] [-F format] 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.
- -D dpi: Use given DPI. Colour scans on library scanners are usually 300, bw 400.
+ -d depth: Use given depth. Default is 1 for black and white, 8 for colour.
+ Unpaper can only handle up to 8.
+ -D dpi: Use given DPI. Colour scans on library scanners are usually 300, bw 400.
+ -F extension: use the output format signified by the extension. Default is png
-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
+ -b: Optimize for BeBook One.
__EOF__
}
forceclean=
convertflags=
unpaperflags=
-depthflags="-depth 1"
+depthset=
+depth=
dpi=
skipmask=
verbose=
-while getopts 'vd:sfpmuc' OPTION
+extension="png"
+bebook=
+while getopts 'vd:D:sfpmucF:b' OPTION
do
case $OPTION in
v) verbose=1
convertflags="$convertflags -verbose"
unpaperflags="$unpaperflags -v --time"
;;
- d) depthflags="-depth $OPTARG"
+ d) depth="$OPTARG"
;;
D) dpi=$OPTARG
;;
;;
t) forceclean=1
;;
-# b) bflag=1
-# bval="$OPTARG"
-# ;;
+ F) extension="$OPTARG"
+ ;;
+ b) bebook=1
+ ;;
?) usage
exit 2
;;
fi
fi
+# guess at depth, unless it's been set
+if [[ "$depth" = "" ]]; then
+ if [[ $( convert $file[0] -format "%k" info: || exit 1 ) == 2 ]]; then
+ depth=1;
+ else
+ depth=8
+ fi
+ if [[ $verbose == 1 ]]; then
+ echo "Depth guessed at $depth."
+ fi
+fi
+
# process pages 1 by 1 to avoid convert gobbling all the memory
for pg in `$my_seq 1 $pages`; do
echo "Processing page $pg."
# convert from pdf
origpnm=$dir/pg-${pgn}.pnm
if [[ ! $([ -e $origpnm ]) || $forcepdf ]]; then
- convert $convertflags $depthflags -density $dpi $file[$(expr $pg - 1)] \
+ convert $convertflags -depth $depth -density $dpi $file[$(expr $pg - 1)] \
$origpnm || exit 1
fi;
unppnm=$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
-
+ #final convert and clean w/ bebook optimisation
+ if [[ $bebook ]]; then
+ convert $convertflags $dir/upg-${pgn}-?.pnm -depth 4 -resize 600x800 final-${pgn}-%01d.${extension} || exit 1
+ else
+ convert $convertflags $dir/upg-${pgn}-?.pnm $dir/final-${pgn}-%01d.${extension} || exit 1
+ fi
done
mkdir $dir/pages
-mv $dir/upg-*.tiff $dir/pages
+mv $dir/upg-*.${extension} $dir/pages