Biometric recognition 13th Chinese Conference, CCBR 2018, Urumqi, China, August 11-12, 2018 : proceedings - Zhou, Jie; Wang, Yunhong; Sun, Zhenan; Jia, Zhenhong; Feng, Jianjiang; Shan, Shiguang; Ubul, Kurban; Guo, Zhenhua (Springer, 2018)