Zicheng Liu received his Ph.D. in computer science from Princeton University in 1996 . He got his B.S. degree in mathematics from HuaZhong Normal University, Wuhan, China, in 1984, and M.S. in operation research from the Institute of Applied Mathematics, Chinese Academy of Sciences, in 1989. Before joining Microsoft Research, he worked at Silicon Graphics Inc as a member of technical staff for two years where he developed the trimmed NURBS tessellator which was shipped in both OpenGL and the OpenGL Optimizer. His current research interests include 3D face modeling, facial expression mapping, face relighting, image segmentation, object/event detection and recognition, multimedia signal processing, and human interactive proofs (HIPs). He has worked on a variety of topics including Steiner trees, average case complexity, linked figure animation, and trimmed NURBS tessellation for large CAD model visualization. He was the co-chair of the IEEE International Workshop on Multimedia Technologies in E-Learning and Collaboration (Oct. 17, 2003, Nice, France).  He is the program co-chair of 2006 IEEE International Workshop on Multimedia Signal Processing (MMSP-06), Victoria, Canada. He is the media co-chair of 2007 International Conference on Multimedia and Expo (ICME07), Beijing, China. He has served in the technical committee for many international conferences. He is a member of the Audio and Electroacoustics Committee of IEEE Signal Processing Society. He is an associate editor of Machine Vision and Applications.  He is a senior member of IEEE.

Publications:

Face (Modeling, Relighting, Expression, Animation)

Action Recognition, Object Detection and Segmentation, Image Classification

Distributed and ad hoc Microphone Arrays, Bone conductive microphones

Multimedia Collaboration and Video Conferencing

Human Interactive Proofs (HIPs)

Linked Figure Animation

Algorithms and Complexity

Click here for a complete list of publications

Media coverage:

CNET News: Microsoft Demos Robotic Receptionist, USA Today , Virtual receptionist video demo video (68MB, WMV format).

Red Herring Magazine by Niall McKay (4/5): Let's play with Microsoft

CBS Saturday Early Show with Renay San Miguel (4/21) : MPEG file (77 MB).

KOMO 4(ABC local news) (5/10): Low resolution(2.5MB), Higher Resolution (12MB).

Cool pictures and animations from my work on linked figure animation:

basketball players (MPEG,350K)

diving simulation (MPEG, 250K)

Personal