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| Presentation | 2012-09-03 15:30 Group Activity Recognition by CRFs with Multiscale Dependency Takuhiro Kaneko, Masamichi Shimosaka, Shigeyuki Odashima, Rui Fukui, Tomomasa Sato (The Univ. of Tokyo)  PRMU2012-49 IBISML2012-32 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Group activity recognition has gained attention in computer vision community. Examples of group activities are queueing in a line, talking together and waiting by an intersection. Since it is often hard to differentiate between these activities only by the appearance of the individual, recent works exploit the contextual information of other people nearby. However, these works do not take enough care of the spatial and temporal consistency in a group (e.g. considering the consistency in only adjacent area). This paper describes a method to integrate individual recognition result via CRFs with multiscale dependency, which assume the relationships among all the people. Unlike previous methods that determine the range of human relations by heuristic, our method describes the "multiscale" relationships in position, size, movement and time sequence as flexible potentials, so as to handle various types, sizes and shapes of groups. Experimental results show that our method outperforms state-of-the art methods on a benchmark, Collective Activity Dataset. Our work is relevant to many applications such as video surveillance, autonomous vehicles or assistive technologies for impaired users. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Group Activity Recognition / CRFs / Multiscale Dependency / Spatial and Temporal Consistency / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 197, PRMU2012-49, pp. 185-190, Sept. 2012. | |
| Paper # | PRMU2012-49 | |
| Date of Issue | 2012-08-26 (PRMU, IBISML) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and 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) | |
| Download PDF | PRMU2012-49 IBISML2012-32 |
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| Conference Information | |
| Committee | PRMU IBISML IPSJ-CVIM |
| Conference Date | 2012-09-02 - 2012-09-03 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | PRMU |
| Conference Code | 2012-09-PRMU-IBISML-CVIM |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Group Activity Recognition by CRFs with Multiscale Dependency |
| Sub Title (in English) | |
| Keyword(1) | Group Activity Recognition |
| Keyword(2) | CRFs |
| Keyword(3) | Multiscale Dependency |
| Keyword(4) | Spatial and Temporal Consistency |
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| 1st Author's Name | Takuhiro Kaneko |
| 1st Author's Affiliation | The University of Tokyo (The Univ. of Tokyo) |
| 2nd Author's Name | Masamichi Shimosaka |
| 2nd Author's Affiliation | The University of Tokyo (The Univ. of Tokyo) |
| 3rd Author's Name | Shigeyuki Odashima |
| 3rd Author's Affiliation | The University of Tokyo (The Univ. of Tokyo) |
| 4th Author's Name | Rui Fukui |
| 4th Author's Affiliation | The University of Tokyo (The Univ. of Tokyo) |
| 5th Author's Name | Tomomasa Sato |
| 5th Author's Affiliation | The University of Tokyo (The Univ. of Tokyo) |
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| Speaker | Author-1 |
| Date Time | 2012-09-03 15:30:00 |
| Presentation Time | 30 minutes |
| Registration for | PRMU |
| Paper # | PRMU2012-49, IBISML2012-32 |
| Volume (vol) | vol.112 |
| Number (no) | no.197(PRMU), no.198(IBISML) |
| Page | pp.185-190 |
| #Pages | 6 |
| Date of Issue | 2012-08-26 (PRMU, IBISML) |
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