I am an associate professor of practice in the School of Computing, National University of Singapore. My research interest is mainly in geometrical computer vision such as 3D reconstruction from images and other geometry related computer vision topics. I am also interested in Signal Processing. Application wise, I am interested in computer vision related technologies such as Markerless Augmented Reality (AR), sports video analytics and image forensics. I am also interested in audio signal processing. I obtained my Ph.D. from Carnegie Mellon University in 1999. My thesis topic was on reconstructing large 3D scenes from 2D images. My bachelor and master degrees were obtained from National University of Singapore, in 1992 and 1988 respectively. I was with the defence R&D for the Ministry of Defence of Singapore for almost my entire career before joining NUS. I also served a year in Media Development Authority as a Program Director in the Interactive Digital Media R&D Programme Office in 2007 and 2008. Prior to joining NUS, I was running the Signal Processing Lab at DSO National Laboratories Singapore. My lab was doing image processing, computer vision and audio processing research for military applications.