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Title
Japanese: 
English:Event Detection by Velocity Pyramid 
Author
Japanese: Liang Zhuolin, 井上 中順, 篠田 浩一.  
English: Zhuolin Liang, Nakamasa Inoue, Koichi Shinoda.  
Language English 
Journal/Book name
Japanese: 
English:Proc. Multimedia Modeling (MMM) 
Volume, Number, Page         pp. 353-364
Published date Jan 6, 2014 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English:Multimedia Modeling (MMM) 2014 
Conference site
Japanese: 
English:Dublin 
File
DOI http://dx.doi.org/10.1007/978-3-319-04114-8_30
Abstract In this paper, we propose velocity pyramid for multimedia event detection. Recently, spatial pyramid matching is proposed to in- troduce coarse geometric information into Bag of Features framework, and is eective for static image recognition and detection. In video, not only spatial information but also temporal information, which repre- sents its dynamic nature, is important. In order to fully utilize it, we propose velocity pyramid where video frames are divided into motional sub-regions. Our method is eective for detecting events characterized by their temporal patterns. Experiment on the dataset of MED (Mul- timedia Event Detection) has shown 10% improvement of performance by velocity pyramid than without this method. Further, when combined with spatial pyramid, velocity pyramid provides an extra 3% gains to the detection result

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