MultiMedia Modeling 25th International Conference, MMM 2019, Thessaloniki, Greece, January 8-11, 2019, Proceedings, Part II - Kompatsiaris, Ioannis; Kompatsiaris, Ioannis; Huet, Benoit; Huet, Benoit; Mezaris, Vasileios; Mezaris, Vasileios; Gurrin, Cathal; Gurrin, Cathal; Cheng, Wen-Huang; Cheng, Wen-Huang; Vrochidis, Stefanos; Vrochidis, Stefanos (Springer International Publishing : Imprint: Springer, 2019)