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Lecture Notes in Computer Science
This paper presents and investigates a set of local spacetime descriptors for representing and recognizing motion patterns in video. Following the idea of local features in the spatial domain, we use the notion of space-time interest points and represent video data in terms of local space-time events. To describe such events, we define several types of image descriptors over local spatio-temporal neighborhoods and evaluate these descriptors in the context of recognizing human activities. Indoi:10.1007/11676959_8 fatcat:ysfir4jkdrdkfjb3otpkyjse2y