DjVu Image Compression Format and Ruby on Rails

While reading up on foreground/background separation techniques, I came across the DjVu image compression format.

DjVu is able to store compressed images of documents as very small files, yet not compromising on the readability. It first separates the foreground and the background of the document, and then compresses the background while keeping the texts at high resolutions. In addition, the foreground text can be OCR-ed as well.

This seems to be related to what I need for the first portion of the project and I shall see whether I can make use of this over the next few days.

There is also a Ruby on Rails meeting coming up later and I shall be attending it to see if it can be useful for the project. In any case, it is perhaps good to learn about it, though I currently have no knowledge of Ruby, what more one on rails?

Also required to try to decide on the software part: programming languages to be used, libraries etc.