diff --git a/OCRmyPDF.sh b/OCRmyPDF.sh
index 6a0c5cb1..db79d761 100755
--- a/OCRmyPDF.sh
+++ b/OCRmyPDF.sh
@@ -3,311 +3,4 @@
 # Copyright (c) 2013-14: fritz-hh from Github (https://github.com/fritz-hh)
 ##############################################################################
 
-# Darwin/OS X has not evolved a proper readlink yet
-if [ $(uname) == "Darwin" ]; then
-	function readlink() {
-		python3 -c 'import os,sys; print(os.path.realpath(sys.argv[1]))' "$2"
-	}
-fi
-
-# Import required scripts
-BASEPATH="$(dirname $(readlink -f $0))"
-. "$BASEPATH/src/config.sh"
-
-# Set variables corresponding to the input parameters
-ARGUMENTS="$@"
-
-START=`date +%s`
-
-usage() {
-	cat << EOF
---------------------------------------------------------------------------------------
-Script aimed at generating a searchable PDF file from a PDF file containing only images.
-(The script performs optical character recognition of each respective page using the
-tesseract engine)
-
-Copyright: fritz-hh  from Github (https://github.com/fritz-hh)
-Version: $VERSION
-
-Usage: OCRmyPDF.sh  [-h] [-v] [-g] [-k] [-d] [-c] [-i] [-o dpi] [-f] [-l language] [-C filename] inputfile outputfile
-
--h : Display this help message
--v : Increase the verbosity (this option can be used more than once) (e.g. -vvv)
--k : Do not delete the temporary files
--g : Activate debug mode:
-     - Generates a PDF file containing each page twice (once with the image, once without the image
-       but with the OCRed text as well as the detected bounding boxes)
-     - Set the verbosity to the highest possible
-     - Do not delete the temporary files
--d : Deskew each page before performing OCR
--c : Clean each page before performing OCR
--i : Incorporate the cleaned image in the final PDF file (by default the original image	
-     image, or the deskewed image if the -d option is set)
--o : If the resolution of an image is lower than dpi value provided as argument, provide the OCR engine with 
-     an oversampled image having the latter dpi value. This can improve the OCR results but can lead to a larger output PDF file.
-     (default: no oversampling performed)
--f : Force to OCR the whole document, even if some page already contain font data 
-     (which should not be the case for PDF files built from scanned images) 
--s : If pages contain font data, do not perform processing on that page, but include the page in the final output.
--b : Skip big pages
--e : Use exact PDF pages with no changes other than inserting hidden OCR text layer (mutually exclusive with -d/-c/-i/-f)
--l : Set the language of the PDF file in order to improve OCR results (default "eng")
-     Any language supported by tesseract is supported (Tesseract uses 3-character ISO 639-2 language codes)
-     Multiple languages may be specified, separated by '+' characters.
--C : Pass an additional configuration file to the tesseract OCR engine.
-     (this option can be used more than once)
-     Note 1: The configuration file must be available in the "tessdata/configs" folder of your tesseract installation
-inputfile  : PDF file to be OCRed
-outputfile : The PDF/A file that will be generated 
---------------------------------------------------------------------------------------
-EOF
-}
-
-
-#################################################
-# Get an absolute path from a relative path to a file
-#
-# Param1 : Relative path
-# Returns: 1 if the folder in which the file is located does not exist
-#          0 otherwise
-################################################# 
-absolutePath() {
-	local wdsave absolutepath 
-	wdsave="$(pwd)"
-	! cd "$(dirname "$1")" 1> /dev/null 2> /dev/null && return 1
-	absolutepath="$(pwd)/$(basename "$1")"
-	cd "$wdsave"
-	echo "$absolutepath"
-	return 0
-}
-
-
-# Initialization the configuration parameters with default values
-VERBOSITY="$LOG_ERR"		# default verbosity level
-LAN="eng"			# default language of the PDF file (required to get good OCR results)
-KEEP_TMP="0"			# 0=no, 1=yes (keep the temporary files)
-PREPROCESS_DESKEW="0"		# 0=no, 1=yes (deskew image)
-PREPROCESS_CLEAN="0"		# 0=no, 1=yes (clean image to improve OCR)
-PREPROCESS_CLEANTOPDF="0"	# 0=no, 1=yes (put cleaned image in final PDF)
-OVERSAMPLING_DPI="0"		# 0=do not perform oversampling (dpi value under which oversampling should be performed)
-PDF_NOIMG="0"			# 0=no, 1=yes (generates each PDF page twice, with and without image)
-FORCE_OCR="0"			# 0=do not force, 1=force (force to OCR the whole document, even if some page already contain font data)
-SKIP_TEXT="0"			# 0=do not skip text pages, 1=skip text pages
-SKIP_BIG="0"
-EXACT_IMAGE="0"
-TESS_CFG_FILES=""		# list of additional configuration files to be used by tesseract
-
-# Parse optional command line arguments
-while getopts ":hvgkdcio:fsbel:C:" opt; do
-	case $opt in
-		h) usage ; exit 0 ;;
-		v) VERBOSITY=$(($VERBOSITY+1)) ;;
-		k) KEEP_TMP="1" ;;
-		g) PDF_NOIMG="1"; VERBOSITY="$LOG_DEBUG"; KEEP_TMP="1" ;;
-		d) PREPROCESS_DESKEW="1" ;;
-		c) PREPROCESS_CLEAN="1" ;;
-		i) PREPROCESS_CLEANTOPDF="1" ;;
-		o) OVERSAMPLING_DPI="$OPTARG" ;;
-		f) FORCE_OCR="1" ;;
-		s) SKIP_TEXT="1" ;;
-		b) SKIP_BIG="1" ;;
-		e) EXACT_IMAGE="1" ;;
-		l) LAN="$OPTARG" ;;
-		C) TESS_CFG_FILES="$OPTARG $TESS_CFG_FILES" ;;
-		\?)
-			echo "Invalid option: -$OPTARG"
-			usage
-			exit $EXIT_BAD_ARGS ;;
-		:)
-			echo "Option -$OPTARG requires an argument"
-			usage
-			exit $EXIT_BAD_ARGS ;;
-	esac
-done
-
-# Remove the optional arguments parsed above.
-shift $((OPTIND-1))
-
-# Check if the number of mandatory parameters provided is as expected
-if [ "$#" -ne "2" ]; then
-	echo "Exactly two mandatory argument shall be provided ($# arguments provided)"
-	usage
-	exit $EXIT_BAD_ARGS
-fi
-
-if [ "$SKIP_TEXT" -eq "1" -a "$FORCE_OCR" -eq "1" ]; then
-	echo "Options -f and -s are mutually exclusive; choose one or the other"
-	usage
-	exit $EXIT_BAD_ARGSor
-fi
-
-! absolutePath "$1" > /dev/null \
-	&& echo "The folder in which the input file should be located does not exist. Exiting..." && exit $EXIT_BAD_ARGS
-FILE_INPUT_PDF="`absolutePath "$1"`"
-! absolutePath "$2" > /dev/null \
-	&& echo "The folder in which the output file should be generated does not exist. Exiting..." && exit $EXIT_BAD_ARGS
-FILE_OUTPUT_PDFA="`absolutePath "$2"`"
-
-
-# set script path as working directory
-cd "$BASEPATH"
-
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "$TOOLNAME version: $VERSION"
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Arguments: $ARGUMENTS"
-
-# check if the required utilities are installed
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Checking if all dependencies are installed"
-! command -v identify > /dev/null && echo "Please install ImageMagick. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! command -v parallel > /dev/null && echo "Please install GNU Parallel. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! command -v pdfimages > /dev/null && echo "Please install poppler-utils. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! command -v pdffonts > /dev/null && echo "Please install poppler-utils. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! command -v pdftoppm > /dev/null && echo "Please install poppler-utils with the option --enable-splash-output enabled. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! command -v pdfseparate > /dev/null && echo "Please install or update poppler-utils to at least 0.24.5. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-[ $PREPROCESS_CLEAN -eq 1 ] && ! command -v unpaper > /dev/null && echo "Please install unpaper. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! command -v tesseract > /dev/null && echo "Please install tesseract and tesseract-data. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! command -v python2 > /dev/null && echo "Please install python v2.x. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! python3 -c 'import lxml' 2>/dev/null && echo "Please install the python library lxml. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! python3 -c 'import reportlab' 2>/dev/null && echo "Please install the python library reportlab. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! command -v gs > /dev/null && echo "Please install ghostscript. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-! command -v java > /dev/null && echo "Please install java. Exiting..." && exit $EXIT_MISSING_DEPENDENCY
-
-
-# ensure the right tesseract version is installed
-# older versions are known to produce malformed hocr output and should not be used
-# Even 3.02.01 fails in few cases (see issue #28). I decided to allow this version anyway because
-# 3.02.02 is not yet available for some widespread linux distributions
-reqtessversion="3.02.01"
-tessversion=`tesseract -v 2>&1 | grep "tesseract" | sed s/[^0-9.]//g`
-tesstooold=$(echo "`echo $tessversion | sed s/[.]//2`-`echo $reqtessversion | sed s/[.]//2` < 0" | bc)
-[ "$tesstooold" -eq "1" ] \
-	&& echo "Please install tesseract ${reqtessversion} or newer (currently installed version is ${tessversion})" && exit $EXIT_MISSING_DEPENDENCY
-
-# ensure the right GNU parallel version is installed
-# older version do not support -q flag (required to escape special characters)
-reqparallelversion="20121122"
-parallelversion=`parallel --minversion 0`
-! parallel --minversion "$reqparallelversion" > /dev/null \
-	&& echo "Please install GNU parallel ${reqparallelversion} or newer (currently installed version is ${parallelversion})" && exit $EXIT_MISSING_DEPENDENCY
-
-# ensure pdftoppm is provided by poppler-utils, not the older xpdf version
-! pdftoppm -v 2>&1 | grep -q 'Poppler' && echo "Please remove xpdf and install poppler-utils. Exiting..." && $EXIT_MISSING_DEPENDENCY
-
-
-# Display the version of the tools if log level is LOG_DEBUG
-if [ $VERBOSITY -ge $LOG_DEBUG ]; then
-	echo "--------------------------------"
-	echo "ImageMagick version:"
-	identify --version
-	echo "--------------------------------"
-	echo "GNU Parallel version:"
-	parallel --version
-	echo "--------------------------------"
-	echo "Poppler-utils version:"
-	pdfimages -v
-	pdftoppm -v
-	pdffonts -v
-	pdfseparate -v
-	echo "--------------------------------"
-	echo "unpaper version:"
-	unpaper --version
-	echo "--------------------------------"
-	echo "tesseract version:"
-	tesseract --version
-	echo "--------------------------------"
-	echo "python2 version:"
-	python2 --version
-	echo "--------------------------------"
-	echo "Ghostscript version:"
-	gs --version
-	echo "--------------------------------"
-	echo "Java version:"
-	java -version
-	echo "--------------------------------"
-fi
-
-
-# check if the languages passed to tesseract are all supported
-for currentlan in `echo "$LAN" | sed 's/+/ /g'`; do
-	if ! tesseract --list-langs 2>&1 | grep "^$currentlan\$" > /dev/null; then
-		echo "The language \"$currentlan\" is not supported by tesseract."
-		tesseract --list-langs 2>&1 | tr '\n' ' '; echo
-		echo "Exiting..."
-		exit $EXIT_BAD_ARGS
-	fi
-done
-
-
-# Initialize path to temporary files using mktemp
-# Goal: save tmp file in a sub-folder of the $TMPDIR environment variable (or in "/tmp" if unset)
-# Unfortunately, Linux mktemp is not compatible with FreeBSD/OSX mktemp
-# Linux version requires no arg
-# FreeBSD requires '-t prefix' to be used so that $TMPDIR is taken into account
-# But in Linux '-t template' is handled differently than in FreeBSD
-# Therefore different calls must be used for Linux and for FreeBSD
-prefix="com.github.ocrmypdf.$(date +"%Y%m%d_%H%M").$(basename "$FILE_INPUT_PDF" | sed 's/[.][^.]*$//')"	# prefix made of date, time and pdf file name without extension
-TMP_FLD=`mktemp -d 2>/dev/null || mktemp -d -t "${prefix}" 2>/dev/null`				# try Linux syntax first, if it fails try FreeBSD/OSX			
-if [ $? -ne 0 ]; then
-	if [ -z "$TMPDIR" ]; then
-		echo "Could not create folder for temporary files. Please ensure you have sufficient right and \"/tmp\" exists"
-	else
-		echo "Could not create folder for temporary files. Please ensure you have sufficient right and \"$TMPDIR\" exists"
-	fi
-	exit $EXIT_FILE_ACCESS_ERROR
-fi
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Created temporary folder: \"$TMP_FLD\""
-
-FILE_TMP="${TMP_FLD}/tmp.txt"						# temporary file with a very short lifetime (may be used for several things)
-FILE_PAGES_INFO="${TMP_FLD}/pages-info.txt"				# for each page: page #; width in pt; height in pt
-FILE_VALIDATION_LOG="${TMP_FLD}/pdf_validation.log"			# log file containing the results of the validation of the PDF/A file
-
-
-# get the size of each pdf page (width / height) in pt (i.e. inch/72)
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Input file: Extracting size of each page (in pt)"
-! identify -format "%w %h\n" "$FILE_INPUT_PDF" > "$FILE_TMP" \
-	&& echo "Could not get size of PDF pages. Exiting..." && exit $EXIT_BAD_INPUT_FILE
-# removing empty lines (last one should be) and add page # before each line
-sed '/^$/d' "$FILE_TMP" | awk '{printf "%04d %s\n", NR, $0}' > "$FILE_PAGES_INFO"
-numpages=`tail -n 1 "$FILE_PAGES_INFO" | cut -f1 -d" "`
-
-# process each page of the input pdf file
-parallel --gnu -q -k --halt-on-error 1 python3 -m src.ocrpage \
-	"$FILE_INPUT_PDF" "{}" "$numpages" "$TMP_FLD" \
-	"$VERBOSITY" "$LAN" "$KEEP_TMP" "$PREPROCESS_DESKEW" "$PREPROCESS_CLEAN" "$PREPROCESS_CLEANTOPDF" "$OVERSAMPLING_DPI" \
-	"$PDF_NOIMG" "$FORCE_OCR" "$SKIP_TEXT" "$SKIP_BIG" "$EXACT_IMAGE" "$TESS_CFG_FILES" < "$FILE_PAGES_INFO"
-ret_code="$?"
-[ $ret_code -ne 0 ] && exit $ret_code 
-
-# concatenate all pages and convert the pdf file to match PDF/A format
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Output file: Concatenating all pages to the final PDF/A file" 
-! gs -dQUIET -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sColorConversionStrategy=/RGB \
-	-sProcessColorModel=DeviceRGB -dPDFA -sPDFACompatibilityPolicy=2 \
-	-sOutputICCProfile=srgb.icc \
-	-sOutputFile="$FILE_OUTPUT_PDFA" "$(pwd)/PDFA_def.ps" "${TMP_FLD}/"*ocred*.pdf \
-	&& echo "Could not concatenate all pages to the final PDF/A file. Exiting..." && exit $EXIT_OTHER_ERROR
-
-# validate generated pdf file (compliance to PDF/A)
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Output file: Checking compliance to PDF/A standard" 
-! java -jar "$JHOVE" -c "$JHOVE_CFG" -m PDF-hul "$FILE_OUTPUT_PDFA" 2> /dev/null 1> "$FILE_VALIDATION_LOG" \
-	&& echo "Unexpected error while checking compliance to PDF/A file. Exiting..." && exit $EXIT_OTHER_ERROR
-grep -i "Status|Message" "$FILE_VALIDATION_LOG" # summary of the validation
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "The full validation log is available here: \"$FILE_VALIDATION_LOG\""
-
-# check the validation results
-pdf_valid=1
-grep -i 'ErrorMessage' "$FILE_VALIDATION_LOG" && pdf_valid=0
-grep -i 'Status.*not valid' "$FILE_VALIDATION_LOG" && pdf_valid=0
-grep -i 'Status.*Not well-formed' "$FILE_VALIDATION_LOG" && pdf_valid=0
-! grep -i 'Profile:.*PDF/A-1' "$FILE_VALIDATION_LOG" > /dev/null && echo "PDF file profile is not PDF/A-1" && pdf_valid=0
-[ $pdf_valid -ne 1 ] && echo "Output file: The generated PDF/A file is INVALID"
-[ $pdf_valid -eq 1 ] && [ $VERBOSITY -ge $LOG_INFO ] && echo "Output file: The generated PDF/A file is VALID"
-
-# delete temporary files
-if [ $KEEP_TMP -eq 0 ]; then
-	[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Deleting temporary files"
-	rm -r -f "${TMP_FLD}"
-fi
-
-END=`date +%s`
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Script took $(($END-$START)) seconds"
-
-[ $pdf_valid -ne 1 ] && exit $EXIT_INVALID_OUTPUT_PDFA || exit 0
+python3 -m src.ocrmypdf "$@"
diff --git a/src/config.sh b/src/config.sh
deleted file mode 100644
index a70324dd..00000000
--- a/src/config.sh
+++ /dev/null
@@ -1,32 +0,0 @@
-#####################################################################################
-# The following parameters might be changed by the user
-#####################################################################################
-
-DEFAULT_DPI=300				# dpi value used as fall back if the page dpi cannot be determined
-
-#####################################################################################
-# Do NOT change the following parameters
-#####################################################################################
-
-TOOLNAME="OCRmyPDF"
-VERSION="v2.1-stable"
-
-# possible exit codes
-EXIT_BAD_ARGS="1"
-EXIT_BAD_INPUT_FILE="2"
-EXIT_MISSING_DEPENDENCY="3"
-EXIT_INVALID_OUTPUT_PDFA="4"
-EXIT_FILE_ACCESS_ERROR="5"
-EXIT_OTHER_ERROR="15"
-
-# possible log levels
-LOG_ERR="0"				# only error messages
-LOG_WARN="1"				# error messages and warnings
-LOG_INFO="2"				# error messages, warnings and some infos
-LOG_DEBUG="3"				# debug level logging
-
-# various paths
-SRC="./src"				# location of the source folder (except source of external tools like jhove)
-OCR_PAGE="$SRC/ocrpage.py"		# path to the script aimed at OCRing one page
-JHOVE="./jhove/bin/JhoveApp.jar"	# java SW for validating the final PDF/A
-JHOVE_CFG="./jhove/conf/jhove.conf"	# location of the jhove config file
diff --git a/src/ocrPage.sh b/src/ocrPage.sh
deleted file mode 100755
index 81f16b2e..00000000
--- a/src/ocrPage.sh
+++ /dev/null
@@ -1,230 +0,0 @@
-#!/bin/sh
-##############################################################################
-# Script aimed at OCRing a single page of a PDF file
-#
-# Copyright (c) 2013-14: fritz-hh from Github (https://github.com/fritz-hh)
-##############################################################################
-
-. "./src/config.sh"
-
-# Initialization of variables passed by arguments
-FILE_INPUT_PDF="$1"			# PDF file containing the page to be OCRed
-PAGE_INFO="$2"				# Various characteristics of the page to be OCRed
-NUM_PAGES="$3"				# Total number of page of the PDF file (required for logging)
-TMP_FLD="$4"				# Folder where the temporary files should be placed
-VERBOSITY="$5"				# Requested verbosity
-LAN="$6"				# Language of the file to be OCRed
-KEEP_TMP="$7"				# Keep the temporary files after processing (helpful for debugging)
-PREPROCESS_DESKEW="$8"			# Deskew the page to be OCRed
-PREPROCESS_CLEAN="$9"			# Clean the page to be OCRed
-PREPROCESS_CLEANTOPDF="${10}"		# Put the cleaned paged in the OCRed PDF
-OVERSAMPLING_DPI="${11}"		# Oversampling resolution in dpi
-PDF_NOIMG="${12}"			# Request to generate also a PDF page containing only the OCRed text but no image (helpful for debugging) 
-FORCE_OCR="${13}"			# Force to OCR, even if the page already contains fonts
-SKIP_TEXT="${14}"			# Skip OCR on pages that contain fonts and include the page anyway
-TESS_CFG_FILES="${15}"			# Specific configuration files to be used by Tesseract during OCRing
-
-################################## 
-# Detect the characteristics of the embedded image for 
-# the page number provided as parameter
-#
-# Param 1: page number
-# Param 2: PDF page width in pt
-# Param 3: PDF page height in pt
-# Param 4: temporary file path (Path of the file in which the output should be written)
-# Output:  A file containing the characteristics of the embedded image. File structure:
-#          DPI=<dpi>
-#          COLOR_SPACE=<colorspace>
-#          DEPTH=<colordepth>
-# Returns:
-#       - 0: if no error occurs
-#       - 1: in case the page already contains fonts (which should be the case for PDF generated from scanned pages) 
-#       - 2: in case the page contains more than one image
-##################################
-getImgInfo() {
-	local page widthPDF heightPDF curImgInfo nbImg curImg propCurImg widthCurImg heightCurImg colorspaceCurImg depthCurImg dpi
-
-	# page number
-	page="$1"
-	# width / height of PDF page (in pt)
-	widthPDF="$2"
-	heightPDF="$3"
-	# path of the file in which the output should be written
-	curImgInfo="$4"
-
-	
-	[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Size ${heightPDF}x${widthPDF} (h*w in pt)"
-	
-	
-	# check if the page already contains fonts (which should not be the case for PDF based on scanned files
-	if [ `pdffonts -f $page -l $page "${FILE_INPUT_PDF}" | wc -l` -gt 2 ]; then
-		[ "$SKIP_TEXT" -eq "0" ] && echo "Page $page: Page already contains font data !!!" 
-		return 1
-	fi
-	
-	# extract raw image from pdf file to compute resolution
-	# unfortunately this image can have another orientation than in the pdf...
-	# so we will have to extract it again later using pdftoppm
-	pdfimages -f $page -l $page -j "$FILE_INPUT_PDF" "$curOrigImg" 1>&2	
-	# count number of extracted images 
-	nbImg=$((`ls -1 "$curOrigImg"* 2>/dev/null | wc -l`))
-	if [ $nbImg -ne "1" ]; then
-		[ $VERBOSITY -ge $LOG_WARN ] && echo "Page $page: Expecting exactly 1 image covering the whole page (found $nbImg). Cannot compute dpi value."
-		return 2
-	fi
-	# Get characteristics of the extracted image
-	curImg=`ls -1 "$curOrigImg"* 2>/dev/null`
-	propCurImg=`identify -format "%w %h %[colorspace] %[depth]" "$curImg"`
-	widthCurImg=`echo "$propCurImg" | cut -f1 -d" "`
-	heightCurImg=`echo "$propCurImg" | cut -f2 -d" "`
-	colorspaceCurImg=`echo "$propCurImg" | cut -f3 -d" "`
-	depthCurImg=`echo "$propCurImg" | cut -f4 -d" "`
-	[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Size ${heightCurImg}x${widthCurImg} (in pixel)"	
-
-	# compute the resolution of the image (making the assumption that x & y resolution are equal)
-	# and round it to the nearest integer
-	dpi=`echo "scale=5;sqrt($widthCurImg*72*$heightCurImg*72/$widthPDF/$heightPDF)+0.5" | bc`
-	dpi=`echo "scale=0;$dpi/1" | bc`
-	
-	# save the image characteristics
-	echo "DPI=$dpi" > "$curImgInfo"
-	echo "COLOR_SPACE=$colorspaceCurImg" >> "$curImgInfo"
-	echo "DEPTH=$depthCurImg" >> "$curImgInfo"
-	
-	return 0
-}
-
-
-page=`echo $PAGE_INFO | cut -f1 -d" "`
-[ $VERBOSITY -ge $LOG_INFO ] && echo "Processing page $page / $NUM_PAGES"
-
-# get width / height of PDF page (in pt)
-widthPDF=`echo $PAGE_INFO | cut -f2 -d" "`
-heightPDF=`echo $PAGE_INFO | cut -f3 -d" "`
-
-# create the name of the required temporary files
-curOrigImg="$TMP_FLD/${page}.orig-img"				# original image available in the current PDF page 
-								# (the image file may have a different orientation than in the pdf file)
-curHocr="$TMP_FLD/${page}.hocr"					# hocr file to be generated by the OCR SW for the current page
-curOCRedPDF="$TMP_FLD/${page}.ocred.pdf"			# PDF file containing the image + the OCRed text for the current page
-curOCRedPDFDebug="$TMP_FLD/${page}.ocred.todebug.pdf"		# PDF file containing data required to find out if OCR worked correctly
-curImgInfo="$TMP_FLD/${page}.orig-img-info.txt"			# Detected characteristics of the embedded image
-
-
-# auto-detect the characteristics of the embedded image
-depthCurImg="8"			# default color depth
-colorspaceCurImg="sRGB"		# default color space
-dpi=$DEFAULT_DPI		# default resolution
-
-getImgInfo "$page" "$widthPDF" "$heightPDF" "$curImgInfo"
-ret_code="$?"
-
-# Handle pages that already contain a text layer
-if ([ "$ret_code" -eq "1" ] && [ "$SKIP_TEXT" -eq "1" ]); then
-	echo "Page $page: Skipping OCR on this page since it already contains text"
-	pdfseparate -f $page -l $page ${FILE_INPUT_PDF} $curOCRedPDF
-	exit 0
-elif ([ "$ret_code" -eq "1" ] && [ "$FORCE_OCR" -eq "0" ]); then
-	echo "Page $page: Exiting... (Use the -f option to force OCRing, even though fonts are available in the input file)" && exit $EXIT_BAD_INPUT_FILE
-elif ([ "$ret_code" -eq "1" ] && [ "$FORCE_OCR" -eq "1" ]); then
-	[ $VERBOSITY -ge $LOG_WARN ] && echo "Page $page: OCRing anyway, assuming a default resolution of $dpi dpi"
-# in case the page contains more than one image, warn the user but go on with default parameters
-elif [ "$ret_code" -eq "2" ]; then
-	[ $VERBOSITY -ge $LOG_WARN ] && echo "Page $page: Continuing anyway, assuming a default resolution of $dpi dpi"
-else
-	# read the image characteristics from the file
-	dpi=`cat "$curImgInfo" | grep "^DPI=" | cut -f2 -d"="`
-	colorspaceCurImg=`cat "$curImgInfo" | grep "^COLOR_SPACE=" | cut -f2 -d"="`
-	depthCurImg=`cat "$curImgInfo" | grep "^DEPTH=" | cut -f2 -d"="`
-fi
-
-# perform oversampling if the resolution is not sufficient to get good OCR results
-if [ "$dpi" -lt "$OVERSAMPLING_DPI" ]; then
-	[ $VERBOSITY -ge $LOG_WARN ] && echo "Page $page: Low image resolution detected ($dpi dpi). Performing oversampling ($OVERSAMPLING_DPI dpi) to try to get better OCR results." 
-	dpi="$OVERSAMPLING_DPI"
-elif [ "$dpi" -lt "200" ]; then
-	[ $VERBOSITY -ge $LOG_WARN ] && echo "Page $page: Low image resolution detected ($dpi dpi). If needed, please use the \"-o\" to try to get better OCR results." 
-fi
-	
-# Identify if page image should be saved as ppm (color), pgm (gray) or pbm (b&w)
-ext="ppm" 	# by default (color image) the extension of the extracted image is ppm
-opt=""		# by default (color image) no option as to be passed to pdftoppm
-if [ "$colorspaceCurImg" = "Gray" ] && [ "$depthCurImg" = "1" ]; then		# if monochrome (b&w)
-	ext="pbm"
-	opt="-mono"
-elif [ "$colorspaceCurImg" = "Gray" ]; then					# if gray
-	ext="pgm"
-	opt="-gray"
-fi
-curImgPixmap="$TMP_FLD/$page.$ext"
-curImgPixmapDeskewed="$TMP_FLD/$page.deskewed.$ext"
-curImgPixmapClean="$TMP_FLD/$page.cleaned.$ext"
-
-# extract current page as image with correct orientation and resolution
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Extracting image as $ext file (${dpi} dpi)"
-! pdftoppm -f $page -l $page -r $dpi $opt "$FILE_INPUT_PDF" > "$curImgPixmap" \
-	&& echo "Could not extract page $page as $ext from \"$FILE_INPUT_PDF\". Exiting..." && exit $EXIT_OTHER_ERROR
-
-# if requested deskew image (without changing its size in pixel)
-widthCurImg=$(($dpi*$widthPDF/72))
-heightCurImg=$(($dpi*$heightPDF/72))
-if [ "$PREPROCESS_DESKEW" -eq "1" ]; then
-	[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Deskewing image"
-	! python2 $SRC/leptonica.py deskew -r $dpi "$curImgPixmap" "$curImgPixmapDeskewed" && exit $?
-else
-	ln -s `basename "$curImgPixmap"` "$curImgPixmapDeskewed"
-fi
-
-# if requested clean image with unpaper to get better OCR results
-if [ "$PREPROCESS_CLEAN" -eq "1" ]; then
-	[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Cleaning image with unpaper"
-	! unpaper --dpi $dpi --mask-scan-size 100 \
-		--no-deskew --no-grayfilter --no-blackfilter --no-mask-center --no-border-align \
-		"$curImgPixmapDeskewed" "$curImgPixmapClean" 1> /dev/null \
-		&& echo "Could not clean \"$curImgPixmapDeskewed\". Exiting..." && exit $EXIT_OTHER_ERROR
-else
-	ln -s `basename "$curImgPixmapDeskewed"` "$curImgPixmapClean"
-fi
-
-# perform OCR
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Performing OCR"
-! tesseract -l "$LAN" "$curImgPixmapClean" "$curHocr" hocr $TESS_CFG_FILES 1> /dev/null 2> /dev/null \
-	&& echo "Could not OCR file \"$curImgPixmapClean\". Exiting..." && exit $EXIT_OTHER_ERROR
-# Tesseract names the output files differently in some distributions.
-if [ -e "$curHocr.html" ]; then
-	mv "$curHocr.html" "$curHocr"
-elif [ -e "$curHocr.hocr" ]; then
-	mv "$curHocr.hocr" "$curHocr"
-elif [ ! -e "$curHocr" ]; then
-	echo "\"$curHocr[.html|.hocr]\" not found. Exiting..." && exit $EXIT_OTHER_ERROR
-fi
-
-# embed text and image to new pdf file
-if [ "$PREPROCESS_CLEANTOPDF" -eq "1" ]; then
-	image4finalPDF="$curImgPixmapClean"
-else
-	image4finalPDF="$curImgPixmapDeskewed"	
-fi
-[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Embedding text in PDF"
-! python2 $SRC/hocrtransform.py -r $dpi -i "$image4finalPDF" "$curHocr" "$curOCRedPDF" \
-	&& echo "Could not create PDF file from \"$curHocr\". Exiting..." && exit $EXIT_OTHER_ERROR
-
-# if requested generate special debug PDF page with visible OCR text
-if [ $PDF_NOIMG -eq "1" ] ; then
-	[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Embedding text in PDF (debug page)"
-	! python2 $SRC/hocrtransform.py -b -r $dpi "$curHocr" "$curOCRedPDFDebug" \
-		&& echo "Could not create PDF file from \"$curHocr\". Exiting..." && exit $EXIT_OTHER_ERROR	
-fi
-
-# delete temporary files created for the current page
-# to avoid using to much disk space in case of PDF files having many pages
-if [ $KEEP_TMP -eq 0 ]; then
-	rm -f "$curOrigImg"*
-	rm -f "$curHocr"
-	rm -f "$curImgPixmap"
-	rm -f "$curImgPixmapDeskewed"
-	rm -f "$curImgPixmapClean"
-	rm -f "$curImgInfo"
-fi
-
-exit 0
diff --git a/tests/test_main.py b/tests/test_main.py
index 246024b3..7e5283b1 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 
+from __future__ import print_function
 from subprocess import Popen, PIPE
 import os
 import shutil
@@ -7,7 +8,6 @@ from contextlib import suppress
 import sys
 
 if sys.version_info.major < 3:
-    from __future__ import print_function
     print("Requires Python 3.4+")
     sys.exit(1)