Made some auto-detection of work already done work; enabled another force flag.

[dja/scandal.git] / scan2pages.sh

diff --git a/scan2pages.sh b/scan2pages.sh
index b129963..025205d 100755 (executable)
--- a/scan2pages.sh
+++ b/scan2pages.sh
@@ -7,7 +7,7 @@ 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 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
@@ -15,20 +15,14 @@ OPTIONS:
        -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=
@@ -138,14 +132,14 @@ for pg in `$my_seq 1 $pages`; do
        
        # convert from pdf
        origpnm=$dir/pg-${pgn}.pnm
-       if [[ ! $([ -e $origpnm ]) || $forcepdf ]]; then
+       if [ ! -e $origpnm ] || [[ $forcepdf ]]; then
                convert $convertflags -depth $depth -density $dpi $file[$(expr $pg - 1)] \
                        $origpnm || 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 10% -depth 8 -blur 10 -median 2 $origpnm $dir/pg-mask-${pgn}.pnm ||exit 1
@@ -162,8 +156,6 @@ for pg in `$my_seq 1 $pages`; do
        
        # 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)
-       # ... not sure why such a convoluted form is required. expr doesn't like
-       # processing a convert -format "%w * %h" or any variant thereof
        if [[ $(convert  $preppnm -format '%[fx:s.w*s.h>1000]' info:) = "0" ]]; then
                [[ $verbose == 1 ]] && echo "Discarding pg ${pgn}: not enough remains after masking."
                continue; 
@@ -171,10 +163,11 @@ for pg in `$my_seq 1 $pages`; do
        
        #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 --no-blackfilter -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}.