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Paper Abstract and Keywords
Presentation 2014-01-24 09:40
Instance Search with Exponential BM25
Masaya Murata, Hidehisa Nagano, Kunio Kashino (NTT), Shin'ichi Satoh (NII) PRMU2013-111 MVE2013-52
Abstract (in Japanese) (See Japanese page) 
(in English) We propose a basic video retrieval and ranking method for instance search task. The task requires a system to search videos in which an instance (a specific person, object, or place) really appears. The instance search is one of the key tasks proposed by the international community on video retrieval research called TRECVID and it has been intensively discussed by the participating community people since 2010. Ameliorating the BM25 (Best Match 25), a state-of-the-art probabilistic retrieval method in the text retrieval field, for image/video retrieval tasks, we have created a new method (named the exponential BM25) and applied it to the instance search tests to find that the performance has recorded the high search accuracy. In this paper, we describe our methodology and show the experimental evaluation results using a series of the TRECVID dataset.
Keyword (in Japanese) (See Japanese page) 
(in English) Video retrieval / Instance search / probabilistic retrieval method / TRECVID / exponential BM25 / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 402, PRMU2013-111, pp. 189-194, Jan. 2014.
Paper # PRMU2013-111 
Date of Issue 2014-01-16 (PRMU, MVE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 IPSJ-CVIM MVE  
Conference Date 2014-01-23 - 2014-01-24 
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 2014-01-PRMU-CVIM-MVE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Instance Search with Exponential BM25 
Sub Title (in English)  
Keyword(1) Video retrieval  
Keyword(2) Instance search  
Keyword(3) probabilistic retrieval method  
Keyword(4) TRECVID  
Keyword(5) exponential BM25  
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1st Author's Name Masaya Murata  
1st Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
2nd Author's Name Hidehisa Nagano  
2nd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
3rd Author's Name Kunio Kashino  
3rd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
4th Author's Name Shin'ichi Satoh  
4th Author's Affiliation National Institute of Informatics (NII)
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Speaker Author-1 
Date Time 2014-01-24 09:40:00 
Presentation Time 30 minutes 
Registration for PRMU 
Paper # PRMU2013-111, MVE2013-52 
Volume (vol) vol.113 
Number (no) no.402(PRMU), no.403(MVE) 
Page pp.189-194 
#Pages
Date of Issue 2014-01-16 (PRMU, MVE) 


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