Abbyy and photos
Abbyy says it is (IIRC) - it has a tool which will automatically pre-process photos.
I've not used this and the concern I would have is that the resolution may be lower than with a scanner. 300 dpi amounts to 1500 x 2100 for a paperback (more or less) so you would need a 3 megapixel camera for a paperback and around a 10 mega pixel camera for A4.
Iain
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