Hi there,
need makes creative, some say.
I made a little shell script that creates a single PDF from one ore more
scanned documents. It lets choose from either ADF or flatbed.
It makes 3 assumptions:
the device must understand the --contrast option
it must understand the --source "Automatic Document Feeder" option, if
adf is chosen as source
scan area and output PDF both is A4 sized, can be changed in a variable
Tested with a simplex ADF device (Epson BX305F ).
With a simplex ADF device like my Epson, this script processes one sided
documents. It may work fine with a duplex ADF device, not tested.
Maybe this is useful for someone, I attach it as .txt.
If you even consider to include it in your software, do so.
Or use it as a template and improve it or whatever.
best regards
#!/bin/sh
# ver 1.0 05-dec-2020
#
# Donated to any Unix people who might find it useful
# Licence: choose any you like
clear
SCANDIR="$HOME/tmp/scan"
# scanner resolution default in dpi
scan_res=300
# default page size to scan
# default values for A4 size
scan_x=210
scan_y=297
scancontrast="23" # gives clearer PDFs, change to your needs, if your device
# does not allow to set contrast at all, remove
# --contrast option from commands below
if [ ! -d $SCANDIR ]; then
mkdir -p $SCANDIR
fi
cd $SCANDIR
rm -f $SCANDIR/scan-page-*.jpg
rm -f $SCANDIR/out*.jpg
echo -e "\033[33;44;01mCreate single PDF from scanned document(s)\033[0m"
echo
echo
echo
echo "This program allows to scan one or more documents and create"
echo "a single PDF file in A4 format from these."; echo
echo "You can choose to scan either with the flatbed unit or an"
echo "automatic document feeder (ADF), if available."; echo
echo "The PDF will be shown after creation using xdg-open."; echo; echo
read -n1 -r -p "(a)utomatic document feeder or (f)latbed scanner or (c)ancel? "
scansource=$REPLY
if [ "$REPLY" == "c" ]; then
exit 0
fi
REPLAY=""
echo ; echo
echo "File name (without extension, no spaces) for new PDF:"
read -r
pdfname=$REPLY
REPLY=""
echo; echo
echo "Choose compression for PDF creation"; echo
echo " 30 For simple documents like bills etc. (default)"
echo " 50-80 For higher quality documents" ; echo
read -r -p "Give value or press <ENTER> for default:"
answer=$REPLY
if [ "$answer" = "" ] ; then
pdfqual="30"
else
pdfqual=$answer
fi
case $scansource in
# When using the flatbed unit
f)
i=1
while [ $i -gt 0 ]; do
echo; echo
echo "Put single sheet on flatbed unit, press <ENTER> to start scan"
read -n1
scanimage --progress --format jpeg --mode Color --contrast
$scancontrast --resolution $scan_res -x $scan_x -y $scan_y -o
$SCANDIR/scan-page-$i.jpg
REPLY=""
echo; echo
read -n1 -r -p "Scan one more document (y/n)?"
if [ "$REPLY" = "n" ] ; then
echo
echo "Creating PDF, please wait..."
# determine scanned pages and convert
# to pdf
pages=$(for scans in $(ls scan-page-*.jpg); do
echo $scans; done)
convert -compress jpeg -quality $pdfqual $pages
$pdfname.pdf
sleep 2
rm -f $SCANDIR/scan-page-*.jpg
i=0
echo "This is your new PDF file:"
ls -l $SCANDIR/$pdfname.pdf
xdg-open $pdfname.pdf &
exit 0
fi
let i=i+1
echo; echo
done
exit 0
;;
# If the ADF is to be used
a)
echo ; echo
echo "Put sheet(s) in your ADF according to your device"
echo
read -n1 -r -p "Press <ENTER> to start scanning"
scanimage --source "Automatic Document Feeder" --batch --progress --format
jpeg --mode Color --contrast $scancontrast --resolution $scan_res -x $scan_x -y
$scan_y
sleep 2
echo "Creating PDF, please wait..."
pages=$(for scans in $(ls out*.jpg); do echo $scans; done)
convert -compress jpeg -quality $pdfqual $pages $pdfname.pdf
sleep 2
rm -f $pages
echo
echo "This is your new PDF:"
ls -l $SCANDIR/$pdfname.pdf
xdg-open $pdfname.pdf &
exit 0
;;
esac
exit
