Biometric Recognition 7th Chinese Conference, CCBR 2012, Guangzhou, China, December 4-5, 2012. Proceedings - Zheng, Wei-Shi; Sun, Zhenan; Wang, Yunhong; Chen, Xilin; Yuen, Pong C.; Lai, Jianhuang (Springer Berlin Heidelberg : Imprint: Springer, 2012)