Added draft

generate.sh

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+#!/bin/bash
+# @see https://faceted.wordpress.com/2010/07/11/how-to-extract-text-from-pdf-files-using-poppler-and-gocr-on-ubuntu/
+# sudo pacman -Syyu tesseract-data-deu tesseract-data-en tesseract
+PPM_FOLDER="$PWD/ppm/";
+PDF_FOLDER="$PWD/pdf/";
+TXT_FOLDER="$PWD/txt/";
+for pdf_origin_file in $PDF_FOLDER*.*; do
+	ppm_output_file="$PPM_FOLDER$(basename $pdf_origin_file)"
+	echo "Generating $ppm_output_file..."
+	pdfimages $pdf_origin_file $ppm_output_file
+done
+for ppm_origin_file in $PPM_FOLDER*.ppm; do
+	txt_output_file_without_suffix="$TXT_FOLDER$(basename $ppm_origin_file)";
+	echo "Generating $txt_output_file_without_suffix.txt..."
+	tesseract -l deu+eng "$ppm_origin_file" "$txt_output_file_without_suffix";
+	echo "file content:"
+	cat "$txt_output_file_without_suffix.txt"
+done