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Note: AS far as I know, Calibre does not do OCR, so a PDF with only scanned content will not work.
by AlphaGeekZulu 3y ago
Note: AS far as I know, Calibre does not do OCR, so a PDF with only scanned content will not work.
- kristofferR 3y agoI recommend running any such PDFs through OCRmyPDF. https://github.com/ocrmypdf/OCRmyPDF https://github.com/ocrmypdf/OCRmyPDF
- ggpsv 3y agoI've had good luck using Tesseract [0] for scanned PDFs. If you're not CLI-inclined, there are several GUIs for it available [1]. I have had good luck downloading scanned PDFs from archive.org and running them through Tesseract. Did not know about Calibre for this - I was relying on opening each search and searching it individually. [0]: https://github.com/tesseract-ocr/tesseract https://github.com/tesseract-ocr/tesseract [1]: https://www.opait.com/tessstudio/ https://www.opait.com/tessstudio/
- kristofferR 3y agoOCRmyPDF is a tool using Tesseract, specifically designed for PDFs. I would recommend that over pure Tesseract. https://github.com/ocrmypdf/OCRmyPDF https://github.com/ocrmypdf/OCRmyPDF