function usage {
cat >&2 << __EOF__
-Usage: $0 [-vfpsmut] [-d depth] pdffile outdir
+Usage: $0 [-vfpsmutb] [-D DPI] [-d depth] [-F format] pdffile outdir
Convert pdffile - a pdf of scanned facing pages - to a set of images in outdir,
each with only one page.
OPTIONS:
-v: Be verbose.
- -d depth: Use given depth. Default is 1. Unpaper can only handle up to 8.
+ -d depth: Use given depth. Default is 1 for black and white, 8 for colour/gray.
+ Unpaper can only handle up to 8.
+ -D dpi: Use given DPI. Colour scans on library scanners are usually 300, bw 400.
+ -F extension: use the output format signified by the extension. Default is png
-s: skip masking/trimming. Overrides -m.
-f: Forceably redo everything.
-p: Forceably redo pdf conversion. Implies options below, equivalent to -f.
-m: Forceably redo masking/trimming and other preprocessing. Impiles options below.
- -u: Forceably redo unpaper processing. Implies option below. IGNORED
+ -u: Forceably redo unpaper processing. Implies option below.
-t: Forceably redo final trimming and cleaning. IGNORED
+ -b: Optimize for BeBook One.
__EOF__
}
## Setup and utilities ##
-# Unpaper
-UNPAPER_PATH="/home/wheel/dja/public-html/scandal/unpaper-0.3/bin"
-PATH=$UNPAPER_PATH:$PATH
-
-# Mac OS X doesn't have seq. It has jot instead.
-Linux_seq="seq"
-Darwin_seq="jot -"
-if [[ $(uname) == "Darwin" ]]; then my_seq=$Darwin_seq;
-else my_seq=$Linux_seq;
-fi;
-
+source $(dirname $0)/my_seq.sh
## Process flags ##
forcepdf=
forceclean=
convertflags=
unpaperflags=
-depthflags="-depth 1"
+depthset=
+depth=
+dpi=
skipmask=
-while getopts 'vd:sfpmuc' OPTION
+verbose=
+extension="png"
+bebook=
+while getopts 'vd:D:sfpmucF:b' OPTION
do
case $OPTION in
- v) convertflags="$convertflags -verbose"
+ v) verbose=1
+ convertflags="$convertflags -verbose"
unpaperflags="$unpaperflags -v --time"
;;
- d) depthflags="-depth $OPTARG"
+ d) depth="$OPTARG"
+ ;;
+ D) dpi=$OPTARG
;;
s) skipmask=1;
;;
;;
t) forceclean=1
;;
-# b) bflag=1
-# bval="$OPTARG"
-# ;;
+ F) extension="$OPTARG"
+ ;;
+ b) bebook=1
+ ;;
?) usage
exit 2
;;
echo "Got $pages page(s)."
rm $dscname
+# guess at DPI, unless it's been set
+# the scans do not seem to accurately reflect their resolution.
+if [[ "$dpi" = "" ]]; then
+ # %k gives the number of colours/shades in the image.
+ # 2 for b/w, and the scanner seems to default to 400 dpi for that
+ # 256 for greyscale, which has to be selected manually (so I'm assuming 300 for no good reason)
+ # 31564 for colour, which defaults to 300
+ if [[ $( convert $file[0] -format "%k" info: || exit 1 ) == 2 ]]; then
+ dpi=400;
+ else
+ dpi=300
+ fi
+ if [[ $verbose == 1 ]]; then
+ echo "DPI guessed at $dpi."
+ fi
+fi
+
+# guess at depth, unless it's been set
+if [[ "$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 $pg."
pgn=$(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)] \
- $origpnm || exit 1
+ origfile=$dir/pg-${pgn}.png
+ if [ ! -e $origfile ] || [[ $forcepdf ]]; then
+ convert $convertflags -depth $depth -density $dpi $file[$(expr $pg - 1)] \
+ $origfile || exit 1
fi;
# preprocess it!
preppnm=$dir/pg-pp-${pgn}.pnm
- if [[ ! $skipmask && ( ! $([ -e $preppnm ]) || $forcemask ) ]]; then
+ 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
+ convert $convertflags -resize 10% -depth 8 -blur 10 -median 2 $origfile $dir/pg-mask-${pgn}.png ||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)
+ # ... get crop co-ords. They're off by ~2 as I don't know how to
+ # properly correct for the border.
+ cropcords=$(convert -border 1x1 -bordercolor '#000' -resize 1000% -trim -fuzz 90% -format "%wx%h%O" $dir/pg-mask-${pgn}.png info: || exit 1)
# ... crop and despeckle? the final pre-prepared image
- convert $convertflags -crop $cropcords $origpnm $preppnm || exit 1
+ convert $convertflags -crop $cropcords $origfile $preppnm || exit 1
elif [[ $skipmask ]]; then
- cp $origpnm $preppnm
+ cp $origfile $preppnm
+ fi;
+
+ # check it hasn't mostly disappeared - e.g. if the scan was all black
+ # (e.g. forgot to put the book down when you first hit scan)
+ if [[ $(convert $preppnm -format '%[fx:s.w*s.h>1000]' info:) = "0" ]]; then
+ [[ $verbose == 1 ]] && echo "Discarding pg ${pgn}: not enough remains after masking."
+ continue;
fi;
#unpaper it
#names go a bit funny here
- #also, ignore flags starting here
- unppnm=$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
+ unppnmbase=$dir/upg-${pgn}
+ if [ ! -e ${unppnmbase}-1.pnm ] || [ ! -e ${unppnmbase}-2.pnm ] || [[ $forceunpaper ]]; then
+ unpaper $unpaperflags --layout double --overwrite -ni 10 -op 2 $preppnm ${unppnmbase}-%01d.pnm || exit 1
+ fi;
+ #detect if the page is 2-up
+ for subpg in $($my_seq 1 2); do
+ echo Processing subpg ${subpg}.
+ if $(dirname $0)/detect2pages.sh $dir/upg-${pgn}-${subpg}.pnm ${pgn} ${subpg}; then
+ if [[ $verbose == 1 ]]; then
+ echo "Resplitting subpg ${subpg}."
+ fi
+ unpaper $unpaperflags --pre-rotate 90 --layout double --overwrite -op 2 $dir/upg-${pgn}-${subpg}.pnm $dir/upg-${pgn}-${subpg}-%01d.pnm
+ else
+ cp $dir/upg-${pgn}-${subpg}.pnm $dir/upg-${pgn}-${subpg}-1.pnm
+ fi;
+
+ done;
+
+ #final convert and clean w/ bebook optimisation
+ if [[ $bebook ]]; then
+ convert $convertflags -colorspace Gray -median 1 $dir/upg-${pgn}-1-?.pnm -trim -resize 1200x1600 $dir/final-${pgn}-1-%01d.${extension} || exit 1
+ convert $convertflags -colorspace Gray -median 1 $dir/upg-${pgn}-2-?.pnm -trim -resize 1200x1600 $dir/final-${pgn}-2-%01d.${extension} || exit 1
+ else
+ convert $convertflags $dir/upg-${pgn}-1-?.pnm $dir/final-${pgn}-1-%01d.${extension} || exit 1
+ convert $convertflags $dir/upg-${pgn}-2-?.pnm $dir/final-${pgn}-2-%01d.${extension} || exit 1
+ fi
done
-mkdir $dir/pages
-mv $dir/upg-*.tiff $dir/pages
+mkdir -p $dir/pages
+mv $dir/final-*.${extension} $dir/pages
git.ucc.asn.au / dja / scandal.git / blobdiff
UCC git Repository :: git.ucc.asn.au