Hi Andrea,
PS: I had another idea in a slightly different application field (roughtly
speaking automated validation of texts) but close of this one, I write an
email next week about that (already some notes in
<http://wikisource.org/wiki/User:Seb35/Reverse_OCR>).
I'll take a look with great interest.
I took a look at that mainly interesting page and I
added some preliminary comments. The field is a large, and promising
one! Perhaps a specific, dedicated space is needed to share ideas and
scripts! Some user is working about here and there, but perhaps a
meeting point is needed.
PS: in our it.wiki talks, we call "Wikisource djvu" the same idea that you call "Reverse_OCR". :-)
Alex brollo