I am the KITHCT Chair Professor at the School of Computing, National University of Singapore. I was the Founding Dean of the School from 1998-2000. My main research interest is in multimedia information retrieval and social media analytics. In particular, my research focuses on the extraction, retrieval and question-answering of text, video and live media arising from the Web and social networks. I am also the Director of a joint research Center between NUS and Tsinghua (NExT) to research into big unstructured multi-source multimodal data analytics.
    I am active in the international research community. I was the recipient of ACM SIGMM Technical Achievement Award 2015. I have also organized and served as program committee member of numerous international conferences in the areas of computer graphics, multimedia and text processing. I was the conference co-chair of ACM Multimedia 2005, ACM CIVR 2005, ACM SIGIR 2008 and ACM Web Science 2015. I serve in the editorial boards of: ACM Transactions of Information Systems (ACM), The Visual Computer (Springer Verlag), and Multimedia Tools and Applications (Kluwer). I am the chair of steering committee of ICMR (International Conference on Multimedia Retrieval) and Multimedia Modeling conference series.