His current research interests include computer vision/graphics, image/video processing, multimedia, machine learning, human motion, human-computer intelligent interaction, and virtual environments, etc.

He serves as associate editors for IEEE Transactions on Pattern Analysis and Machine Intelligence (IEEE T-PAMI), IEEE Transactions on Image Processing (IEEE T-IP), IEEE Transactions on Circuits and Systems for Video Technology (IEEE-TCSVT), SPIE Journal of Electronic Imaging (JEI), and IAPR Journal of Machine Vision and Applications (MVA). He serves as Program Chair and Area Chairs for top conferences including CVPR, ICCV, and ECCV.