My primary research focus is computer vision. I am also interested in the applications of vision and learning for mobile health. Specifically, my group develops methods and systems to automatically analyze human activities for healthcare applications. I have been serving as area chairs (equivalent to senior program committee) for the top vision conferences CVPR, ICCV and ECCV. I am the co-recipient of the best student paper awards at MobiHealth 2014 and IEEE Face and Gesture 2015. My work had been covered by MIT Tech Review, WIRED UK and New Scientist.