Connolly, C., & Quam, L. (2007, April). FREEDIUS: an open source Lisp-based image understanding environment. In Proceedings of the 2007 International Lisp Conference (pp. 1-10).
This paper describes FREEDIUS, an open-source image understanding system. FREEDIUS is a Lisp-C hybrid system that exploits CLOS for rapid prototyping, flexibility of presentation in the user interface, and flexibility in persistent object storage. Applications of FREEDIUS include site modeling, video track analysis and event recognition.