Recovery in the presence of Global Illumination

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Talk by Mohit Gupta ,PhD student, Robotics Institute, CMU.
Time: July 9, 2pm Place: Rm.2311 (CS Wireless Seminar Room), Computer Science Building

Light interacts with any real world scene in complex ways, resulting in phenomena such as inter-reflections, subsurface scattering and volumetric scattering. Such phenomena are collectively termed as global light transport or global illumination. Due to their complexity, it is hard to model and invert the effects of global illumination. Consequently, recovering scene properties in the presence of global illumination remains a challenging vision problem.

In the first part of the talk, I will present our recent work on recovering scene depths in the presence of inter-reflections and sub-surface scattering. We demonstrate our approach using scenes with complex shapes, textures and material properties. In the second part, I will talk about designing active vision systems which can see clearer and farther in poor visibility conditions such as underwater scenarios, bad weather and smoke.

Bio: Mohit Gupta is a 4th year PhD student in the Robotics Institute, CMU advised by Srinivasa G. Narasimhan. He received his B.Tech. in Computer Science from the Indian Institute of Technology, New Delhi in 2003. He received his M.S. in Computer Science from the Stony Brook University, New York in 2005. His research interests are in physics-based computer vision and computer graphics. Currently, he is focusing on designing active vision systems for recovering scene properties under complex light transport.