論文

査読有り 筆頭著者 国際誌
2020年5月

Evaluation of 3D markerless motion capture accuracy using OpenPose with multiple video cameras

Frontiers in Sports and Active Living
  • Nobuyasu Nakano
  • ,
  • Tetsuro Sakura
  • ,
  • Kazuhiro Ueda
  • ,
  • Leon Omura
  • ,
  • Arata Kimura
  • ,
  • Yoichi Iino
  • ,
  • Senshi Fukashiro
  • ,
  • Shinsuke Yoshioka

2
開始ページ
50
終了ページ
50
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3389/fspor.2020.00050

There is a need within human movement sciences for a markerless motion capture system, which is easy to use and sufficiently accurate to evaluate motor performance. This study aims to develop a 3D markerless motion capture technique, using OpenPose with multiple synchronized video cameras, and examine its accuracy in comparison with optical marker-based motion capture. Participants performed three motor tasks (walking, countermovement jumping, and ball throwing), and these movements measured using both marker-based optical motion capture and OpenPose-based markerless motion capture. The differences in corresponding joint positions, estimated from the two different methods throughout the analysis, were presented as a mean absolute error (MAE). The results demonstrated that, qualitatively, 3D pose estimation using markerless motion capture could correctly reproduce the movements of participants. Quantitatively, of all the mean absolute errors calculated, approximately 47% were <20 mm, and 80% were <30 mm. However, 10% were >40 mm. The primary reason for mean absolute errors exceeding 40 mm was that OpenPose failed to track the participant's pose in 2D images owing to failures, such as recognition of an object as a human body segment or replacing one segment with another depending on the image of each frame. In conclusion, this study demonstrates that, if an algorithm that corrects all apparently wrong tracking can be incorporated into the system, OpenPose-based markerless motion capture can be used for human movement science with an accuracy of 30 mm or less.

リンク情報
DOI
https://doi.org/10.3389/fspor.2020.00050
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/33345042
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7739760
ID情報
  • DOI : 10.3389/fspor.2020.00050
  • PubMed ID : 33345042
  • PubMed Central 記事ID : PMC7739760

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