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2003
ACM

Video retrieval using spatio-temporal descriptors

10 years 5 months ago
Video retrieval using spatio-temporal descriptors
This paper describes a novel methodology for implementing video search functions such as retrieval of near-duplicate videos and recognition of actions in surveillance video. Videos are divided into half-second clips whose stacked frames produce 3D space-time volumes of pixels. Pixel regions with consistent color and motion properties are extracted from these 3D volumes by a threshold-free hierarchical space-time segmentation technique. Each region is then described by a high-dimensional point whose components represent the position, motion and, when possible, color of the region. In the indexing phase for a video database, these points are assigned labels that specify their video clip of origin. All the labeled points for all the clips are stored into a single binary tree for efficient k-nearest neighbor retrieval. The retrieval phase uses video segments as queries. Half-second clips of these queries are again segmented to produce sets of points, and for each point the labels of its n...
Daniel DeMenthon, David S. Doermann
Added 05 Jul 2010
Updated 05 Jul 2010
Type Conference
Year 2003
Where MM
Authors Daniel DeMenthon, David S. Doermann
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