Advances in Multimedia Information Processing – PCM 2012 13th Pacific-Rim Conference on Multimedia, Singapore, December 4-6, 2012. Proceedings - Lin, Weisi; Xu, Dong; Ho, Anthony; Wu, Jianxin; He, Ying; Cai, Jianfei; Kankanhalli, Mohan; Sun, Ming-Ting (Springer Berlin Heidelberg : Imprint: Springer, 2012)