Special Seminar, Monday, April 22nd at 11:00 AM, “Vision through an air-ocean surface”

April 16th, 2013 @   -  No Comments
Sponsored by the MBL Program in Sensory Physiology & Behavior and WHOI Applied Ocean Physics & Engineering Department

Dr. Yoav Y. Schechner, Associate Professor
Technion, Israel Institute of Technology – Department of Electrical Engineering
“Vision through an air-ocean surface”
Monday, April 22, 2013
11:00 AM
ABSTRACT. We increase the complexity of visual tasks by considering vision through an ocean’s water surface. Seeing into water from above (e.g., space, aircraft) is important for remote sensing of coastal regions. Seeing into air from underwater is related to marine animal vision, and also can be used for a ‘virtual periscope’. We present models and methods for such tasks, accounting for reflection/refraction at the water surface, atmospheric effects, underwater scattering and random surface distortions. In particular, we explain how true object motion can be distinguished from the random dynamic motion of image projection caused by water waves, and how visual triangulation (by stereo or viewpoint motion) is possible in such rough conditions. Furthermore, we show how random light patterns on the sea floor, created by waves, lead to very accurate (and surprisingly simple) recovery of the underwater 3D structure.

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