The unix program 'unpaper' was recently recommended for cleaning up artifacts on scanned images. Unfortunately it doesn't natively do pdfs, only "pnm family" -- pbm, pgm and ppm formats. [more inside]
posted on May 16, 2007 - 10 answers

Scanning a book and converting to a PDF - how do I antialias the scanned page images? [more inside]
posted on Apr 2, 2007 - 8 answers

How can I convert a Dynatext book (with SGML exporting capabilities) to something that can be viewed on a web server ? [more inside]
posted on Mar 21, 2007 - 4 answers

How can I scan a book that is precious to me? The book is a couple hundred pages and I just want to produce high-quality pdfs. [more inside]
posted on Oct 25, 2006 - 9 answers