Verification of gait analysis method fusing camera-based pose estimation and an IMU sensor in various gait conditions

A markerless gait analysis system can measure useful gait metrics to determine effective clinical treatment. Although this gait analysis system does not require a large space, several markers, or time constraints, it inaccurately measure lower limb joint kinematics during gait. In particular, it has...

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Bibliographic Details
Published inScientific reports Vol. 12; no. 1; p. 17719
Main Authors Yamamoto, Masataka, Shimatani, Koji, Ishige, Yuto, Takemura, Hiroshi
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 21.10.2022
Nature Publishing Group
Nature Portfolio
Subjects
639/166/985
692/700/565/491
Ankle
Ankle Joint
Biomechanical Phenomena
Cameras
Gait
Gait Analysis
Humanities and Social Sciences
Humans
Kinematics
Male
multidisciplinary
Science
Science (multidisciplinary)
Walking
Young Adult
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Summary:A markerless gait analysis system can measure useful gait metrics to determine effective clinical treatment. Although this gait analysis system does not require a large space, several markers, or time constraints, it inaccurately measure lower limb joint kinematics during gait. In particular, it has a substantial ankle joint angle error. In this study, we investigated the markerless gait analysis method capability using single RGB camera-based pose estimation by OpenPose (OP) and an inertial measurement unit (IMU) sensor on the foot segment to measure ankle joint kinematics under various gait conditions. Sixteen healthy young adult males participated in the study. We compared temporo-spatial parameters and lower limb joint angles during four gait conditions with varying gait speeds and foot progression angles. These were measured by optoelectronic motion capture, markerless gait analysis method using OP, and proposed method using OP and IMU. We found that the proposed method using OP and an IMU significantly decreased the mean absolute errors of peak ankle joint angles compared with OP in the four gait conditions. The proposed method has the potential to measure temporo-spatial gait parameters and lower limb joint angles, including ankle angles, in various gait conditions as a clinical settings gait assessment tool.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-22246-5