convert a PDF to TIFF using gs, convert from TIFF to txt using tesseract

extract.sh

# $1 is the first argument
# remove result.txt
#rm output/result.txt

fname=`echo "$1" | awk -F "/" '{print $(NF)}'`
# convert the pdf to a group of tiffs

if [ ! -e extracted_tz_parliament/$fname.txt ];
   then
       echo "Working on $fname..."
       gs -dNOPAUSE -dBATCH -sDEVICE=tiffg4 -sOutputFile=scan_%d.tif $1
       i=1
       while [ $i -ge 0 ]
       do
           if [ -a scan_$i.tif ]
           then
               tesseract scan_$i.tif scan_$i

               # add the text to the result.txt file
               cat scan_$i.txt >> output/result.txt
               rm scan_$i.txt scan_$i.tif
               i=$(( $i + 1 ))

           else
               i=-100
           fi
        done
else
echo "File $fname.txt exists, moving on."
fi
mv output/result.txt extracted_tz_parliament/$fname.txt