I've wondered myself if anyone else has tried to improve OCR by taking a 2-step scanning process... that is, photocopy-enlarging the pages to letter size, then doing the scan and OCR. This has worked for me on small article scans, but I've never gone through the trouble for an entire book.
(Frankly, my head would blow up if I considered digitizing my entire library, and it's not that big!)
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