PDF Notes

References

• https://medium.com/@kaerumy/cleaning-up-scanned-documents-with-open-source-tools-9d87e15305b
• https://github.com/scantailor/scantailor/wiki/Split-Pages
• http://www.tobias-elze.de/pdfsandwich/

• https://www.howtogeek.com/197195/how-to-remove-a-password-from-a-pdf-file-in-linux/
• https://stackoverflow.com/questions/36270555/open-a-pdf-with-blank-password-with-pdftk

• https://www.howtogeek.com/228796/how-to-extract-and-save-images-from-a-pdf-file-in-linux/
• https://ocrmypdf.readthedocs.io/en/latest/cookbook.html
• https://www.onetransistor.eu/2015/12/ocr-searchable-pdf-linux.html ==

Bash Script for converting Magazine

for fn in *.pdf ; do
	echo $fn
	#Cleanup from prior runs
	rm -f tmp/images*tif
	#Split pdf pages into individual tif files
	pdfimages -tiff "$fn" ./tmp/images

	#combine into a single tif file
	tiffcp tmp/images*tif $(basename "$fn" .pdf).tif

	####put combined TIF into docker folder for OCRMyPDF and wait for output

	#
	tiff2pdf -o ../../../OCRMyPDF/Input/$fn $(basename "$fn" .pdf).tif
done
rm tmp/images*tif

Bash command to rename yyyymmdd_hhmmss to yyyy-mm-dd_hh.mm.ss

find . -regextype posix-extended  -regex ".*/[0-9]{8}_[0-9]{6}.*" -exec rename -v 's/(\d{4})(\d{2})(\d{2})_(\d{2})(\d{2})(\d{2})/$1-$2-$3_$4.$5.$6/' {} \;

Bash Script for processing scans

cd <sourcefolder>
tiffcp <list of tif files> <output.pdf>
cp <output.pdf> //wormhole/Media/OCRMyPDF/Input
cp //wormhole/Media/OCRMyPDF/Output/<output.pdf> <destination folder>