each with only one page.
OPTIONS:
-v: Be verbose.
- -d depth: Use given depth. Default is 1 for black and white, 8 for colour.
+ -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
-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 ##
-# 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 $0)/my_seq.sh
## Process flags ##
forcepdf=
pgn=$(printf '%03d' $pg)
# convert from pdf
- origpnm=$dir/pg-${pgn}.pnm
- if [[ ! $([ -e $origpnm ]) || $forcepdf ]]; then
+ origfile=$dir/pg-${pgn}.png
+ if [ ! -e $origfile ] || [[ $forcepdf ]]; then
convert $convertflags -depth $depth -density $dpi $file[$(expr $pg - 1)] \
- $origpnm || exit 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. 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" $dir/pg-mask-${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 $unppnm || exit 1
+ unppnmbase=$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;
+
+ for subpg in $($my_seq 1 2); do
+ echo Processing subpg ${subpg}.
+
+ subpgfile=${unppnmbase}-${subpg}.pnm #$unppnmbase has $dir/ already
+
+ prepsubpnm=$dir/upg-pp-${pgn}-${subpg}.pnm
+
+ # remask and retrim. FIXME: may throw off 2page detection
+ convert $convertflags -resize 10% -depth 8 -gamma 0.01 -median 2 $subpgfile $dir/spg-mask-${pgn}-${subpg}.png ||exit 1
+
+ # Trim #-border 1x1 -bordercolor '#fff' -trim -fuzz 30%
+ cropcords=$(convert -trim -fuzz 90%\
+ -resize 1000% -format "%wx%h%O" $dir/spg-mask-${pgn}-${subpg}.png info: || exit 1)
+
+ # ... crop and despeckle? the final pre-prepared image
+ convert $convertflags -crop $cropcords $subpgfile $prepsubpnm || exit 1
+
+ #detect if the page is 2-up
+
+ if $(dirname $0)/detect2pages.sh ${prepsubpnm} ${pgn} ${subpg}; then
+ if [[ $verbose == 1 ]]; then
+ echo "Resplitting subpg ${subpg}."
+ fi
+ unpaper $unpaperflags --pre-rotate 90 --layout double --overwrite -op 2 $prepsubpnm $dir/upg-${pgn}-${subpg}-%01d.pnm || exit 1
+ else
+ cp $prepsubpnm $dir/upg-${pgn}-${subpg}-1.pnm
+ fi;
- #final convert and clean w/ bebook optimisation
- if [[ $bebook ]]; then
- convert $convertflags $dir/upg-${pgn}-?.pnm -depth 4 -resize 600x800 $dir/final-${pgn}-%01d.${extension} || exit 1
- else
- convert $convertflags $dir/upg-${pgn}-?.pnm $dir/final-${pgn}-%01d.${extension} || exit 1
- fi
+ #final convert and clean w/ bebook optimisation
+ if [[ $bebook ]]; then
+ convert $convertflags -colorspace Gray -median 1 $dir/upg-${pgn}-${subpg}-?.pnm -trim -fuzz 80% -resize 1200x1600 $dir/final-${pgn}-${subpg}-%01d.${extension} || exit 1
+ else
+ convert $convertflags $dir/upg-${pgn}-${subpg}-?.pnm $dir/final-${pgn}-${subpg}-%01d.${extension} || exit 1
+ fi
+
+ done;
+
done
-mkdir $dir/pages
+mkdir -p $dir/pages
mv $dir/final-*.${extension} $dir/pages