MultiMedia Modeling 21st International Conference, MMM 2015, Sydney,NSW, Australia, January 5-7, 2015, Proceedings, Part I - He, Xiangjian; Luo, Suhuai; Tao, Dacheng; Xu, Changsheng; Yang, Jie; Hasan, Muhammad Abul (Springer International Publishing : Imprint: Springer, 2015)