He has published more than 40 papers in peer-reviewed journals and conferences, including IEEE TPAMI, TIP, TMM, PR, CVPR, ICCV, ICML, and has received the Best Student Poster Award Runner-up from IEEE CVPR 2008 for the work on Manifold-Manifold Distance. He serves as regular reviewer/PC member for a number of leading journals and conferences, e.g. IEEE TPAMI, TIP, TCSVT, TMM, TNNLS, IJCV, ICCV, CVPR, and ECCV. He has organized tutorials in ACCV 2014 and CVPR 2015 with his colleagues. He has given invited talks in workshops of ICME 2014 and ACCV 2014. His current research interests include video-based face recognition/retrieval, facial expression analysis, image set classification, distance metric learning, and manifold learning. He is a member of the IEEE.