Flexible Scene Understanding Based on Geometric Structure Estimation from Appearance of Video Sequence

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In order to detect and track pedestrians in an outdoor scene, we proposed the methods that exploit its geometric structure. For example, if we know where a road and a building are in the scene, it is possible to improve the performance of pedestrian detection drastically. Specifically speaking, we proposed the methods for (1) estimating prior probability of human existence and (2) obtaining accurate human motion trajectories. Additionally, in order develop the new application area of pedestrian detection and tracking, we proposed a method that analyzes interaction between pedestrians and estimates their mutual relationship.