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|
#!/bin/bash
#
# cleanup_scans.sh
#
# Bash script to deskew and deborder scanned images
#
# Copyright (C) 2008, 2015 Moreno Marzolla
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Version history:
#
# Version 0.1, 2008/08/03 - initial version
# Version 0.2, 2015/04/11 - changed /bin/sh to /bin/bash
#
# Author: moreno.marzolla (at) unibo.it
# http://www.moreno.marzolla.name/
#
# This script is used to process a bunch of color, grayscale or B/W scans
# Syntax:
#
# cleanup_scans.sh <file1> <file2> ...
#
# This will process file1, file2... and produce file1.tiff file2.tiff...
# in the current directory.
#
# Color scans will be converted into color TIFFs; Grayscale or black/white
# scans will be converted into B/W tiffs (unless the --forcecolor option
# is used). Both color and grayscale pages are automatically deskewed.
#
# At the moment this script contains some hardcoded defaults, which need
# to be removed before using it as a general-purpose scan-to-tiff processor
#
# This script requires the following external applications:
# - ImageMagick (convert and mogrify)
# - netpbm, the current development version from svn (it uses the pamtilt
# utility which is not included into the stable netpbm distribution)
# - perl (for evaluating a simple expression; I was unable to do that
# using only bash)
#
convert=convert
pamtilt=pamtilt
crop_geometry=2400x3250+0+0
deskew=yes
forcecolor=no
deborder=yes
function process_color_image {
# Adjust color levels and crop
local base=`basename $1 .image`
local skew=0
local deborder_cmd=(-fuzz 10% -fill white -draw "color 2540,3500 floodfill" )
echo -n "Processing COLOR image $1..."
if [ $deborder == "no" ]; then
deborder_cmd=();
fi
if [ $deskew == "yes" ]; then
echo -n "Tilt"
skew=`$convert -quiet $1 \
-crop $crop_geometry \
+repage \
-level 10%,80%,1 \
-monochrome \
"pnm:-" | $pamtilt`
skew=`perl -e "if (abs($skew)>0.1 && abs($skew)<3.0) { print (- $skew) } else { print 0 }"`
echo -n "(${skew})..."
fi
echo -n "converting..."
convert $1 \
-background white \
-rotate $skew \
+matte "${deborder_cmd[@]}" \
-level 10%,80%,1 \
-crop $crop_geometry \
+repage \
+matte \
-format tiff \
$base.tiff
\rm -f $base.pnm
echo "done"
}
function process_gray_image {
local base=`basename $1 .image`
local skew=0
local deborder_cmd=(-stroke black -fill black -draw "rectangle 0,0 50,3505" -draw "rectangle 0,0 2548,50" -draw "rectangle 0,3405 2548,3505" -draw "rectangle 2448,0 2548,3505" -fill white -draw "color 0,0 floodfill")
if [ $deborder == "no" ]; then
deborder_cmd=();
fi
echo -n "Processing GRAY image $1..."
# If the image is already black and white, then simpler operations must be performed
local bitssample=`tiffinfo $1 | grep Bits | tr -c -d [:digit:]`
if [ $bitssample -ne "1" ]; then
echo -n "B/W (slow)..."
$convert -quiet $1 \
-colorspace gray \
-level 10%,90%,1 \
-blur 2 \
+dither \
-monochrome \
-flatten "${deborder_cmd[@]}" \
-crop $crop_geometry \
+repage \
\( -write $base.pnm \) \
+matte $base.tiff
else
echo -n "B/W (fast)..."
$convert -quiet $1 "${deborder_cmd[@]}" \
-crop $crop_geometry \
+repage \
\( -write $base.pnm \) \
+matte $base.tiff
fi
if [ $deskew == "yes" ]; then
echo -n "Tilt"
skew=`$pamtilt $base.pnm`
skew=`perl -e "if (abs($skew)>0.1 && abs($skew)<3) { print (- $skew) } else { print 0 }"`
echo -n "(${skew})..."
fi
echo -n "Rotate..."
mogrify -quiet \
+dither \
-rotate $skew \
-monochrome \
+matte \
-format tiff \
-compress Group4 \
$base.tiff
\rm -f $base.pnm
echo "done"
}
function print_usage {
cat<<EOF
Usage: $0 [--help] [--nodeskew] [--forcecolor] [--nodeborder] <inputfile> ...
--nodeskew Do not deskew the image (default: deskew)
--forcecolor Do not convert grayscale images to B/W (default: convert to B/W)
--nodeborder Do not attempt to remove the black border (default: remove)
--help Print this message
EOF
exit -1;
}
if [ $# -lt 1 ]; then
print_usage;
fi
while [ $# -gt 0 ]; do
file=$1
shift;
if [ $file == "--help" ]; then
print_usage;
fi
if [ $file == "--nodeskew" ]; then
deskew=no
continue
fi
if [ $file == "--forcecolor" ]; then
forcecolor=yes
continue
fi
if [ $file == "--nodeborder" ]; then
deborder="no";
continue
fi
if [ ! -f $file ]; then
echo "$file does not exist"
continue
fi
if [ $forcecolor == "yes" ]; then
process_color_image $file
else
photoint=`tiffinfo ${file} | grep -i "Photometric Interpretation"`
case $photoint in
*"RGB color") process_color_image $file ;;
*) process_gray_image $file ;;
esac
fi
done
|
