pdfseparate ../source.pdf page%04d.pdf
ls *.pdf | awk '1==1 {printf("convert -quality 100 -density 200 %s %s.tif\n",$0,$0)'}
ls *.tif | gawk '1==1 {printf("tesseract -l eng+ita %s %s.txt pdf \n",$0,$0);}'  | sh
pdfunite *.txt.pdf out.pdf
pdftotext out.pdf out.txt