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Paper Abstract and Keywords
Presentation 2019-09-04 16:25
Inter-frame interpolation by height constraint for sequential human silhouette images -- Application to forensic gait analysis under low frame-rate condition --
Daisuke Imoto, Kenji Kurosawa, Masakatsu Honma, Ryo Yokota, Manato Hirabayashi, Yoshinori Hawai (NRIPS) PRMU2019-19 MI2019-38
Abstract (in Japanese) (See Japanese page) 
(in English) Boundary information is important for defining the shape of an object or a person as a first approximation, and widely used for quantitative analysis in fields such as fluid, cells, medical images, and human video analysis. For example, gait-based human identification technology, which describes the shape of a person as a silhouette (boundary information), has been beginning to be used in forensic investigation. However, under low frame-rate condition, accuracy has dropped due to lack of the in-between information of a pair of successive silhouettes. In order to compensate for such an information loss, a reliable boundary tracking technique for interpolating in-between silhouettes (i.e. boundary tracking) is necessary, but a method suitable for human video analysis has not been proposed yet. In order to solve this problem, in this paper, we proposed a novel simply-extending boundary tracking method based on the assumption that the positions of the body points do not merely change along the height or vertical direction. As a result, by using the proposed method, it is elucidated that we can perform frame interpolation with much higher accuracy than the previous methods. Furthermore, the proposed method has improved the accuracy of gait-based human identification under low frame-rate conditions. It is expected that the proposed method may be effective in other applications or fields such as action recognition, physical motion science, and sports video analysis, etc.
Keyword (in Japanese) (See Japanese page) 
(in English) Boundary tracking / inter-frame interpolation / human video analysis / gait-based human identification / / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 192, PRMU2019-19, pp. 43-48, Sept. 2019.
Paper # PRMU2019-19 
Date of Issue 2019-08-28 (PRMU, MI) 
ISSN 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)
Download PDF PRMU2019-19 MI2019-38

Conference Information
Committee PRMU MI IPSJ-CVIM  
Conference Date 2019-09-04 - 2019-09-05 
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 2019-09-PRMU-MI-CVIM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Inter-frame interpolation by height constraint for sequential human silhouette images 
Sub Title (in English) Application to forensic gait analysis under low frame-rate condition 
Keyword(1) Boundary tracking  
Keyword(2) inter-frame interpolation  
Keyword(3) human video analysis  
Keyword(4) gait-based human identification  
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1st Author's Name Daisuke Imoto  
1st Author's Affiliation National Research Institute of Police Science (NRIPS)
2nd Author's Name Kenji Kurosawa  
2nd Author's Affiliation National Research Institute of Police Science (NRIPS)
3rd Author's Name Masakatsu Honma  
3rd Author's Affiliation National Research Institute of Police Science (NRIPS)
4th Author's Name Ryo Yokota  
4th Author's Affiliation National Research Institute of Police Science (NRIPS)
5th Author's Name Manato Hirabayashi  
5th Author's Affiliation National Research Institute of Police Science (NRIPS)
6th Author's Name Yoshinori Hawai  
6th Author's Affiliation National Research Institute of Police Science (NRIPS)
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Speaker Author-1 
Date Time 2019-09-04 16:25:00 
Presentation Time 15 minutes 
Registration for PRMU 
Paper # PRMU2019-19, MI2019-38 
Volume (vol) vol.119 
Number (no) no.192(PRMU), no.193(MI) 
Page pp.43-48 
#Pages
Date of Issue 2019-08-28 (PRMU, MI) 


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