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Paper Abstract and Keywords
Presentation 2016-05-21 15:20
The influences of deterioration of reflective marker used in optical motion capture system on measurement accuracy.
Masashi Oobuchi, Toyohiko Hayashi, Shigehito Tanahshi (Niigata Univ.), Hiroshi Tanaka, Hiroaki Inui, Hiroki Ninomiya, Katsuya Nobuhara (Nobuhara Hospital) MBE2016-6
Abstract (in Japanese) (See Japanese page) 
(in English) Optical motion capture system is a device to analyze the motion of bodies, such as human motion. By measuring infrared light reflective markers secured to the object by means of more than or equal to two motion cameras, we can obtain time-series data of 3-dimensional coordinates of the makers. One of the problems of this measurement is that repetitive use of the markers gradually increases measurement error due to the separation and/or corruption of a reflective material. The relationship between such marker deterioration and measurement error, however, has yet to be clarified quantitatively. Then as its basic study, we made several models of partial loss of the reflector, and investigated the relationship between each deterioration pattern and measurement error quantitatively using a set of two motion cameras mutually arranged perpendicularly. Empirical results suggested that 1) the partial loss of the reflector makes the detected position of the marker image deviate, causing measurement error, and 2) there is a possibility that the measurement error could be estimated from the shape, area and position of the partial loss image.
Keyword (in Japanese) (See Japanese page) 
(in English) Infrared light reflective marker / Optical motion capture system / Marker deterioration / Measurement accuracy / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 58, MBE2016-6, pp. 29-34, May 2016.
Paper # MBE2016-6 
Date of Issue 2016-05-14 (MBE) 
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 MBE NC  
Conference Date 2016-05-21 - 2016-05-21 
Place (in Japanese) (See Japanese page) 
Place (in English) University of Toyama 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2016-05-MBE-NC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) The influences of deterioration of reflective marker used in optical motion capture system on measurement accuracy. 
Sub Title (in English)  
Keyword(1) Infrared light reflective marker  
Keyword(2) Optical motion capture system  
Keyword(3) Marker deterioration  
Keyword(4) Measurement accuracy  
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1st Author's Name Masashi Oobuchi  
1st Author's Affiliation Niigata university (Niigata Univ.)
2nd Author's Name Toyohiko Hayashi  
2nd Author's Affiliation Niigata university (Niigata Univ.)
3rd Author's Name Shigehito Tanahshi  
3rd Author's Affiliation Niigata university (Niigata Univ.)
4th Author's Name Hiroshi Tanaka  
4th Author's Affiliation Nobuhara Hospital and Institute of Biomechanics (Nobuhara Hospital)
5th Author's Name Hiroaki Inui  
5th Author's Affiliation Nobuhara Hospital and Institute of Biomechanics (Nobuhara Hospital)
6th Author's Name Hiroki Ninomiya  
6th Author's Affiliation Nobuhara Hospital and Institute of Biomechanics (Nobuhara Hospital)
7th Author's Name Katsuya Nobuhara  
7th Author's Affiliation Nobuhara Hospital and Institute of Biomechanics (Nobuhara Hospital)
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Speaker Author-1 
Date Time 2016-05-21 15:20:00 
Presentation Time 25 minutes 
Registration for MBE 
Paper # MBE2016-6 
Volume (vol) vol.116 
Number (no) no.58 
Page pp.29-34 
#Pages
Date of Issue 2016-05-14 (MBE) 


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