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.
- -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
+ -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.
+ -e extension: use the output format signified by the extension. Default is png
+ -b: Optimize for BeBook One.
+ -1: each physical page contains one logical page
+ -2: each physical page contains two logical pages
+ (neither specified: try to figure it out)
__EOF__
}
-## Setup and utilities ##
-# 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;
+## Setup and utilities ##
+source $(dirname $0)/my_seq.sh
## Process flags ##
-forcepdf=
-forcemask=
-forceunpaper=
-forceclean=
convertflags=
unpaperflags=
-depthflags="-depth 1"
+depthset=
+depth=
dpi=
skipmask=
verbose=
-while getopts 'vd:sfpmuc' OPTION
+extension="png"
+bebook=
+logperphys=
+while getopts 'vd:D:e:b12' OPTION
do
case $OPTION in
v) verbose=1
convertflags="$convertflags -verbose"
unpaperflags="$unpaperflags -v --time"
;;
- d) depthflags="-depth $OPTARG"
+ d) depth="$OPTARG"
;;
D) dpi=$OPTARG
;;
- s) skipmask=1;
- ;;
- f) forcepdf=1; forcemask=1; forceunpaper=1; forceclean=1
+ e) extension="$OPTARG"
;;
- p) forcepdf=1; forcemask=1; forceunpaper=1; forceclean=1
+ b) bebook=1
;;
- m) forcemask=1; forceunpaper=1; forceclean=1
+ 1) logperphys=1
;;
- u) forceunpaper=1; forceclean=1
+ 2) logperphys=2
;;
- t) forceclean=1
- ;;
-# b) bflag=1
-# bval="$OPTARG"
-# ;;
?) usage
exit 2
;;
exit 2
fi
-file=$1
-dir=$2
+scanfile=$1
+outdir=$2
filedir=$(dirname $1)
base=$(basename $1 .pdf)
# make the output dir
-mkdir -p $dir
+mkdir -p $outdir
-# figure out the number of pages
-dscname=$dir/${base}.dsc
-pdf2dsc $file $dscname || exit 1
-pages=$(awk '$1 ~ "%%Pages" {print $2}' $dscname)
-echo "Got $pages page(s)."
-rm $dscname
# guess at DPI, unless it's been set
# the scans do not seem to accurately reflect their resolution.
# 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
+ if [[ $( convert $scanfile[0] -format "%k" info: || exit 1 ) == 2 ]]; then
dpi=400;
else
dpi=300
fi
fi
+# guess at depth, unless it's been set
+if [[ "$depth" = "" ]]; then
+ if [[ $( convert $scanfile[0] -format "%k" info: || exit 1 ) == 2 ]]; then
+ depth=1;
+ else
+ depth=8
+ fi
+ if [[ $verbose == 1 ]]; then
+ echo "Depth guessed at $depth."
+ fi
+fi
+
+# figure out the number of pages
+dscname=$outdir/${base}.dsc
+pdf2dsc $scanfile $dscname || exit 1
+pages=$(awk '$1 ~ "%%Pages" {print $2}' $dscname)
+echo "Got $pages page(s)."
+rm $dscname
+
# process pages 1 by 1 to avoid convert gobbling all the memory
-for pg in `$my_seq 1 $pages`; do
- echo "Processing page $pg."
+for scanpgnum in `$my_seq 1 $pages`; do
+ echo "Processing page $scanpgnum."
- pgn=$(printf '%03d' $pg)
+ scanpgnum=$(printf '%03d' $scanpgnum)
# convert from pdf
- origpnm=$dir/pg-${pgn}.pnm
- if [[ ! $([ -e $origpnm ]) || $forcepdf ]]; then
- convert $convertflags $depthflags -density $dpi $file[$(expr $pg - 1)] \
- $origpnm || exit 1
+ scanpg=$outdir/scanpg-${scanpgnum}.png
+ if [ ! -e $scanpg ]; then
+ convert $convertflags -depth $depth -density $dpi $scanfile[$(expr $scanpgnum - 1)] \
+ $scanpg || exit 1
fi;
- # preprocess it!
- preppnm=$dir/pg-pp-${pgn}.pnm
- if [[ ! $skipmask && ( ! $([ -e $preppnm ]) || $forcemask ) ]]; then
+done;
+
+# do ocr binarise
+[ -e $outdir/scanpgs ] && rm -r $outdir/scanpgs
+ocropus book2pages $outdir/scanpgs $outdir/scanpg-*.png || exit 1
+
+for scanpgnum in `$my_seq 1 $pages`; do
+
+ binscanpg=$outdir/scanpgs/$(printf '%04d' $scanpgnum).bin.png
+ scanpgnum=$(printf '%03d' $scanpgnum)
+ scanpg=$outdir/scanpg-${scanpgnum}.png
+
+ # preprocess scanned page
+ cleanscanpg=$outdir/scanpg-clean-${scanpgnum}.pnm
+ if [ ! -e $cleanscanpg ]; 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 $scanpg $outdir/scanpg-mask-${scanpgnum}.png ||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 400% -trim -fuzz 90% -format "%wx%h%O" $dir/pg-mask-${pgn}.pnm info: || exit 1)
+ cropcords=$(convert -border 1x1 -bordercolor '#000' -resize 1000% -trim -fuzz 90% -format "%wx%h%O" $outdir/scanpg-mask-${scanpgnum}.png 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
+ convert $convertflags -crop $cropcords $binscanpg $cleanscanpg || exit 1
fi;
- #unpaper it
- #names go a bit funny here
- #also, ignore flags starting here
- unppnm=$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
+ # 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 $cleanscanpg -format '%[fx:s.w*s.h>1000]' info:) = "0" ]]; then
+ [[ $verbose == 1 ]] && echo "Discarding pg ${scanpgnum}: not enough remains after masking."
+ continue;
+ fi;
+ #unpaper it
+ physpgbase=$outdir/physpg-${scanpgnum}
+ if [ ! -e ${physpgbase}-1.pnm ] || [ ! -e ${physpgbase}-2.pnm ]; then
+ unpaper $unpaperflags --layout double --overwrite -ni 10 -op 2 $cleanscanpg ${physpgbase}-%01d.pnm || exit 1
+ fi;
+ for physpgnum in $($my_seq 1 2); do
+ echo Processing physical page ${physpgnum}.
+
+ physpg=${physpgbase}-${physpgnum}.pnm #$physpgbase has $outdir/ already
+
+ cleanphyspg=$outdir/physpg-clean-${scanpgnum}-${physpgnum}.pnm
+
+ if [ ! -e $cleanphyspg ]; then
+ # remask and retrim. FIXME: may throw off 2page detection
+ convert $convertflags -resize 10% -depth 8 -gamma 0.01 -median 2 $physpg $outdir/physpg-mask-${scanpgnum}-${physpgnum}.png ||exit 1
+
+ # Trim #-border 1x1 -bordercolor '#fff' -trim -fuzz 30%
+ cropcords=$(convert -trim -fuzz 90%\
+ -resize 1000% -format "%wx%h%O" $outdir/physpg-mask-${scanpgnum}-${physpgnum}.png info: || exit 1)
+
+ # ... crop and despeckle? the final pre-prepared image
+ convert $convertflags -crop $cropcords $physpg $cleanphyspg || exit 1
+ fi;
+
+ #detect if the page is 2-up
+
+ if [[ $logperphys == 2 ]] || ( [[ $logperphys != 1 ]] && $(dirname $0)/detect2pages.sh ${cleanphyspg} ${scanpgnum} ${physpgnum} ); then
+ if [[ $verbose == 1 ]]; then
+ echo "Resplitting physical page ${physpgnum}."
+ fi
+ unpaper $unpaperflags --pre-rotate 90 --layout double --overwrite \
+ -op 2 --no-blackfilter --no-grayfilter --no-noisefilter \
+ --no-blurfilter $cleanphyspg $outdir/logpg-${scanpgnum}-${physpgnum}-%01d.pnm || exit 1
+ else
+ cp $cleanphyspg $outdir/logpg-${scanpgnum}-${physpgnum}-1.pnm
+ fi;
+
+ #prepare for ocr
+ convert $convertflags $outdir/logpg-${scanpgnum}-${physpgnum}-?.pnm $outdir/logpg-${scanpgnum}-${physpgnum}-%01d.png || exit 1
+
+ #final convert and clean w/ bebook optimisation
+ if [[ $bebook ]]; then
+ convert $convertflags $outdir/logpg-${scanpgnum}-${physpgnum}-?.pnm -trim -fuzz 80% -resize 1200x1600 $outdir/final-${scanpgnum}-${physpgnum}-%01d.${extension} || exit 1
+ else
+ convert $convertflags $outdir/logpg-${scanpgnum}-${physpgnum}-?.pnm $outdir/final-${scanpgnum}-${physpgnum}-%01d.${extension} || exit 1
+ fi
+
+ done;
+
done
-mkdir $dir/pages
-mv $dir/upg-*.tiff $dir/pages
+#try full ocr
+rm -rf $outdir/logpgs
+ocropus book2pages $outdir/logpgs $outdir/logpg-*.png
+ocropus pages2lines $outdir/logpgs
+ocropus lines2fsts $outdir/logpgs
+ocropus fsts2bestpaths $outdir/logpgs
+ocropus buildhtml $outdir/logpgs > $outdir/out.html
+
+mkdir -p $outdir/pages
+mv $outdir/final-*.${extension} $outdir/pages
git.ucc.asn.au / dja / scandal.git / blobdiff
UCC git Repository :: git.ucc.asn.au