He received his Ph.D. degree in Computational Neuroscience, working at the Artificial Intelligence Laboratory, from the Massachusetts Institute of Technology (MIT), in 1993. His main research interests are in computer vision and computational modeling of human vision. His work includes early visual processing of Saliency and Grouping mechanisms, Visual Recognition, Image Synthesis for Animation and Graphics, and Theory of Computer Vision in the areas of three-dimensional processing from a collection of two-dimensional views.