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Paper Abstract and Keywords
Presentation 2023-08-29 16:45
A Study on evaluation index for step counting of PDR
Hana Osawa, Masahiro Fujii (Utsunomiya Univ.) ITS2023-10
Abstract (in Japanese) (See Japanese page) 
(in English) Pedestrian Dead Reckoning (PDR) is an alternative pedestrian location estimation method for indoor when GNSS (Global Navigation Satellite System) signals are not readily available. PDR is a method that calculates walking information such as the number of steps and direction of movement using sensor information in a smart device by a pedestrian. It is possible to calculate the amount of relative movement from the initial position. Due to the characteristics of relative position estimation, it is important to minimize the error in the calculated gait information because errors accumulate as the positioning time increases.
Among the components of PDR, step detection has been used in many previous studies as an evaluation index for the difference between the estimated and true values of the cumulative number of steps. However, we expect that all step time estimates be close to the true time because the PDR is the cumulative distance traveled per step and direction of travel. In this paper, we propose a new evaluation index focusing on the time of step detection. The step detection method is evaluated by setting up an interval from the true step time to determine if the detection time is correct or incorrect, and by applying the correctness of each step to a table based on a confusion matrix to determine the reproduction rate and goodness of fit.
Keyword (in Japanese) (See Japanese page) 
(in English) Pedestrian Dead Reckoning / Step Detection / Confusion Matrix / Smartwatch / / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 169, ITS2023-10, pp. 16-21, Aug. 2023.
Paper # ITS2023-10 
Date of Issue 2023-08-22 (ITS) 
ISSN 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 ITS2023-10

Conference Information
Committee ITS IPSJ-ITS IEE-ITS  
Conference Date 2023-08-29 - 2023-08-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Kanto Gakuin Univ. (Kanazawa-Hakkei Campus) 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ITS 
Conference Code 2023-08-ITS-ITS-ITS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on evaluation index for step counting of PDR 
Sub Title (in English)  
Keyword(1) Pedestrian Dead Reckoning  
Keyword(2) Step Detection  
Keyword(3) Confusion Matrix  
Keyword(4) Smartwatch  
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1st Author's Name Hana Osawa  
1st Author's Affiliation Utsunomiya University (Utsunomiya Univ.)
2nd Author's Name Masahiro Fujii  
2nd Author's Affiliation Utsunomiya University (Utsunomiya Univ.)
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Speaker Author-1 
Date Time 2023-08-29 16:45:00 
Presentation Time 25 minutes 
Registration for ITS 
Paper # ITS2023-10 
Volume (vol) vol.123 
Number (no) no.169 
Page pp.16-21 
#Pages 6 
Date of Issue 2023-08-22 (ITS) 

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