Semantic multimedia : second International Conference on semantic and digital media technologies, SAMT 2007, Genoa, Italy, December 5-7, 2007. Proceedings - Avrithis, Yannis; Buitelaar, Paul; Kompatsiaris, Ioannis; Spagnuolo, Michela; Falcidieno, Bianca (Lecture Notes in Computer Science,, 2007)