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Institute for Robotics and Intelligent Machines (IRIM)
Institute for Robotics and Intelligent Machines (IRIM)
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Item4D View Synthesis: Navigating Through Time and Space(Georgia Institute of Technology, 2007) Sun, Mingxuan ; Schindler, Grant ; Kang, Sing Bing ; Dellaert, Frank
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ItemRao-Blackwellized Importance Sampling of Camera Parameters from Simple User Input with Visibility Preprocessing in Line Space(Georgia Institute of Technology, 2006-06) Quennesson, Kevin ; Dellaert, FrankUsers know what they see before where they are: it is more natural to talk about high level visibility information ("I see such object") than about one's location or orientation. In this paper we introduce a method to find in 3D worlds a density of viewpoints of camera locations from high level visibility constraints on objects in this world. Our method is based on Rao-Blackwellized importance sampling. For efficiency purposes, the proposal distribution used for sampling is extracted from a visibility preprocessing technique adapted from computer graphics. We apply the method for finding in a 3D city model of Atlanta the virtual locations of real-world cameras and viewpoints.