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Paper Abstract and Keywords
Presentation 2014-03-13 10:00
Velocity Pyramid for Event Detection
Zhuolin Liang, Nakamasa Inoue, Koichi Shinoda (Tokyo Inst. of Tech.) PRMU2013-170
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a new motion feature, a velocity pyramid, for multimedia event detection. In an event which is a complex human activity, motion information is an important cue. However, most of the conventional motion features are too expensive when applied to event detection. Spatial pyramid matching introduces coarse geometric information into the Bag of Features framework. A velocity pyramid, which is motivated from spatial pyramid, can represent rough dynamic information. The idea is to categorize densely sampled features according to their velocity direction. It is effective for detecting events characterized by their temporal patterns. Experiments on the MED (Multimedia Event Detection) task of the TRECVID workshop have shown 20% improvement of the performance by velocity pyramid. Further, when combined with spatial pyramid, velocity pyramid provided an extra 5% gains to the detection performance. Also when compared with other motion features, the computation cost is reduced while keeping the performance.
Keyword (in Japanese) (See Japanese page) 
(in English) Event detection / spatial pyramid / temporal analysis / GMM supervectors / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 493, PRMU2013-170, pp. 13-18, March 2014.
Paper # PRMU2013-170 
Date of Issue 2014-03-06 (PRMU) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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reproduction
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee PRMU  
Conference Date 2014-03-13 - 2014-03-14 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To PRMU 
Conference Code 2014-03-PRMU 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Velocity Pyramid for Event Detection 
Sub Title (in English)  
Keyword(1) Event detection  
Keyword(2) spatial pyramid  
Keyword(3) temporal analysis  
Keyword(4) GMM supervectors  
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1st Author's Name Zhuolin Liang  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
2nd Author's Name Nakamasa Inoue  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
3rd Author's Name Koichi Shinoda  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
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Speaker Author-1 
Date Time 2014-03-13 10:00:00 
Presentation Time 30 minutes 
Registration for PRMU 
Paper # PRMU2013-170 
Volume (vol) vol.113 
Number (no) no.493 
Page pp.13-18 
#Pages
Date of Issue 2014-03-06 (PRMU) 


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