Run the Count Pages plug-in, and then compare the number of pages to the Size (MB) shown in Calibre. Scanned (pure image) .pdf files often have only a few (e.g. 3-10) pages for a huge file size. Use the View Manager plug-in to Sort by pages, ascending, then Size, descending, to quickly compare.
DaltonST
Last edited by DaltonST; 06-06-2018 at 06:27 PM.
Reason: clarified scanned .pdf files
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