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AIC Seminar Series

Towards Useful 3D Semantic Maps

Radu B. RusuAritificial Intelligence Center, SRI International[Home Page]

Date:  2007-12-11 at 16:00

Location:  EJ228 (SRI E building)  (Directions)

   Abstract

Learning useful representations of 3d environments and automatically segmenting objects of interest is a challenging task. For the last decade, the area of robot mapping has been struggling to simultaneously localize and build maps of robots as they move in unknown environments. With a few exceptions, consistent point cloud maps can be acquired in a large variety of scenarios. On the other hand, people in robot planning have been developing algorithms that can operate robots, with the assumption that the underlying world model is known.

Our work is driven by the fact that a new area of research has been spawn, which connects the two, in the sense that meaningful representations have to be carefully extracted and higher level semantics discovered in the acquired world map, in order to be useful for higher level planning.

We investigate the problem of acquiring 3D semantic maps in a variety of scenarios, with a strong emphasis on our indoor distributed ubiquitous sensing project (the AwareKitchen). The objects modeled in these maps include cabinets, tables, drawers and shelves, and objects in the environment that have particular relevance for a household robotic assistant. The mapping approach is based on point cloud representations, and a set of sophisticated and robust interpretation methods operating on these representations, which lie at the intersection of various research fields like: computer graphics, statistics, photogrammetry and sensing, robotics, and optimization theory.

Several example applications for interpreting data coming from indoor, outdoor, and aerial scans, digitized models, and human motion segmentation are given as well.

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