Why ScanTailor should be used for scanned books
There are two problem with automating splitting scanned books in a single pass:
- Automation is not always accuracy
- Making a scanned book comfortably read is more than just splitting pages
For everything related with scanned books, I highly recommend using ScanTailor. It has features such as:
- turn skewed pages vertically,
- select content to reduce the page size,
- add more margin to have more space for notetaking,
- whiten the result for better reading experience.
You must export the PDF into images to use this, and recombine the output images back. The processed images may be very small in file size (up to only 6% of the origin), but excellent in quality.
To complete the task satisfactorily, I recommend you to use PDF-Xchange Viewer for extracting images and adding OCR, i2pdf for merging the outputs. In my experience, you can set the JPG quality to the lowest and it doesn’t seem much different, but you have a trade-off between the final output’s size and image quality. All programs are free. The whole process takes around 1 hour in background, with occasional checks.
From its GitHub:
Scan Tailor is Free Software (which is more than just freeware). It’s written in C++ with Qt and released under the General Public License version 3. We develop both Windows and GNU/Linux versions.
(This post is initially an answer of this question on Super User: How can I split in half a double-page scanned PDF in a single pass?)
Submitted August 30, 2018 at 07:19AM by Ooker777
via reddit https://www.reddit.com/r/pdf/comments/9bl23m/why_scantailor_should_be_used_for_scanned_books/?utm_source=ifttt
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