Digitizing books to DjVu with free tools « philiKON – a journal: "The answer is, of course, to create a digital copy. One possible format for that would be PDF. Problem is: for its image data it has to resort to conventional compression algorithms. That means that scanned documents can turn out to be quite large. A file format that’s much more suited for this is DjVu. One of its tricks is a lossy algorithm that recognizes recurring shapes such as characters. As a result, DjVu encoded books are typically a quarter of the size of PDF encoded books.
Given the need to digitize a couple of books at work, I investigated whether it’s possible to create high-quality digital copies using freely available tool"
