Paperless Office using the Raspberry Pi

This is a follow-up on an older blog using Ubuntu.

Creative Commons Creative Commons Attribution 2.0 Generic License (http://creativecommons.org/licenses/by/2.0/) by rosmary

Raspberry Pi Prerequisites

Since this will be a purely headless install designed to sit in a corner behind the scanner I am using a Base Raspian (Debian Wheezy) install (I personally like the clean minimal install via https://github.com/debian-pi/raspbian-ua-netinst the best).

apt-get install sudo vim wget wput libusb-dev build-essential git-core

Add non-privileged user account(s)

adduser USERNAME

adduser USERNAME sudo groupadd scanner usermod -a -G scanner USERNAME`

Install Sane

The version of sane from the Raspbian repos is not working with the Fujitsu ScanJet range and needs to be built from source.

git clone git://git.debian.org/sane/sane-backends.git

cd sane-backends BACKENDS=epjitsu ./configure –prefix=/usr –sysconfdir=/etc –localstatedir=/var make make install`

Install S1300i Driver

You need to get the driver file (‘1300i_0D12.nal’) from the CD that came with the scanner. If you still have access to a CDROM drive that is. :(

mkdir -p /usr/share/sane/epjitsu/

cp 1300i_0D12.nal /usr/share/sane/epjitsu/`

Check /etc/sane.d/epjitsu.conf and see if the following line is there (in my case it was already created by sane build).

# Fujitsu S1300i

firmware /usr/share/sane/epjitsu/1300i_0D12.nal usb 0x04c5 0x128d`

sane-find-scanner -q

found USB scanner (vendor=0x04c5 [FUJITSU], product=0x128d [ScanSnap S1300i]) at libusb:001:004
found USB scanner (vendor=0x0424, product=0xec00) at libusb:001:003

scanimage -L

device `epjitsu:libusb:001:004′ is a FUJITSU ScanSnap S1300i scanner

Copy libsane rules from the sane build directory to udev rules.

sudo cp sane-backends/tools/udev/libsane.rules /etc/udev/rules.d/60-libsane.rules

Logout and log in a the non-privileged user account previously created.

If the scanimage -L command works as above you have fully configured the scanner to work under that user account.

Start saned on boot-up

Edit the /etc/rc.local file and add the following line before the ‘0’ line to ensure saned is running as the non-privileged user when you have to reboot.

saned -a USERNAME

Installing Conversion Tools

sudo apt-get install imagemagick bc exactimage pdftk tesseract-ocr tesseract-ocr-eng unpaper

You can add other languages such as tesseract-ocr-deu if you require OCR support for those.

Scan to Repository Script

The script is hosted on Github: https://github.com/leogaggl/misc-scripts/blob/master/scan2repo.sh

#!/bin/bash

# ------------------------------------------------------------------
# [Author]  Leo Gaggl
#           http://www.gaggl.com
#           ©2014 - SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
#           License GPL V2 - details see attached LICENSE file

#           This script captures a still image from the Raspberry Pi
#           via the camera and upload it to AWS S3 or Linode object storage.
#           https://gaggl.com
#
# Dependency:
#     Raspberry Camera Module - enabled
#     s3cmd tools installed
# ------------------------------------------------------------------

IMAGEDIR=/home/pi/wildlife-rpi-cam/
OUT_DIR=~/scan
TMP_DIR=`mktemp -d`
FILE_NAME=scan_`date +%Y%m%d-%H%M%S`
LANGUAGE="eng"
echo 'scanning...'
scanimage --resolution 300 \
	  --batch="$TMP_DIR/scan_%03d.pnm" \
          --format=pnm \
          --mode Gray \
          --source 'ADF Duplex'
echo "Output saved in $TMP_DIR/scan*.pnm"
cd "$TMP_DIR"
# cut borders
echo 'cutting borders...'
for i in scan_*.pnm; do
    mogrify -shave 50x5 "${i}"
done
# check if there is blank pages
echo 'checking for blank pages...'
for f in ./*.pnm; do
    unpaper --size "a4" --overwrite "$f" "$(echo "$f" | sed 's/scan/scan_unpaper/g')"
    #need to rename and delete original since newer versions of unpaper can't use same file name
    rm -f "$f"
done
# apply text cleaning and convert to tif
echo 'cleaning pages...'
for i in scan_*.pnm; do
    echo "${i}"
    convert "${i}" -contrast-stretch 1% -level 29%,76% "${i}.tif"
done
# Starting  OCR
echo 'doing OCR...'
for i in scan_*.pnm.tif; do
    echo "${i}"
    tesseract "$i" "$i" -l "$LANGUAGE" hocr
    hocr2pdf -i "$i" -s -o "$i.pdf"

• Configuration
• Raspberry Pi
• Utilities