Quote:
Originally Posted by Jellby
Even with text-based PDFs, the PDF does not (necessarily) contain information about words, paragraphs, etc. The characters are easy to extract (unless there are funny fonts involved) but joining hyphenated words at the end of line, putting spaces where they belong, removing page numbres and headers, dealing with footnotes, putting columns in the right order, detecting paragraphs, etc. is a different matter.
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Mobipocket's reader/converter seems to do a better job of converting from PDF than Calibre, though it is still not perfect. I don't see how conversion would be responsible for all the spelling mistakes in ebooks though.