Introducing a unified framework for content object description. - Petros Daras; Apostolos Axenopoulos; Vasilios Darlagiannis; Dimitrios Tzovaras; Xavier Le Bourdon; Laurent Joyeux; Anne Verroust-Blondet; Vincenzo Croce; Thomas Steiner; Alberto Massari; Antonio Camurri; Steeve Morin; et al. (Int. J. Multim. Intell. Secur., 2011)