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In this paper, we propose a nonparametric grammar based framework for analyzing trajectories, aiming to discover the motion pattern of objects and assist human understanding. The framework works in three steps. 1) Raw trajectories are smoothed to eliminate noise, and then, points and segments are sampled as primitive units. 2) The primitive units are clustered based on DPM and HDP-HMM, in order to...
The research on event detection in unmanned aerial videos has received a large attention in the recent years. Plenty of methods have been proposed in this area. However, there is no agreement on which methods fit well for the application in the unmanned aerial videos and which methods fit well for certain event detection. In this paper, we present a framework for event detection in unmanned aerial...
During the last years, Automatic video analysis has become a very important research for video management, such as video index and video retrieval. The application domains are disparate, ranging from video surveillance to automatic video annotation for sport videos or TV shots. Whatever the application field, most of the works in video analysis are based on two main approaches: the former based on...
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