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Motion tracking has numerous applications in virtual reality (VR), including gaming, training, rehabilitation, sports, creating avatars in VR. The kinematics of the joints during various exercises, such as walking, running, and squatting, has been described in the literature. When assessing the performance of physical exercises of VR users using motion tracking, a proper analysis of the kinematics of individual joints provides the basis for broader conclusions. The objective of this study is to compare the range of motion measurements of the ankle joint obtained through two low-budget motion tracking systems, namely the Kinovea video system and the Vive Trackers sensor-based system using the eMotion measurement app. A comparison of the results of the range of motion in the ankle joint in the sagittal plane (dorsiflexion and plantar flexion) obtained through video analysis and data recorded by Vive Trackers Sensors was performed. For all measurements, the average difference in calculated values is 8.3°, with a standard deviation of 9.14°. The study showed relatively high agreement in measuring ankle joint angle values obtained by two inexpensive tracking methods while performing a motion task in footwear (4.26°). However absence of footwear is associated with a greater discrepancy in the results (14.26°). The Vive Trackers Sensors with the eMotion measurement app have the potential to be widely used in biomechanical applications. However, a larger study incorporating more complex movement sequences should be conducted.

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Low-Cost Motion Tracking Systems in the Kinematics Analysis of VR Game Users – Preliminary Study

  • 会议论文

  • 发表日期：

    2025年

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  • Urszula Czajkowska,
  • Magdalena Żuk,
  • Celina Pezowicz,
  • Michał Popek,
  • Marcin Łopusiewicz,
  • Katarzyna Bulińska

摘要

Motion tracking has numerous applications in virtual reality (VR), including gaming, training, rehabilitation, sports, creating avatars in VR. The kinematics of the joints during various exercises, such as walking, running, and squatting, has been described in the literature. When assessing the performance of physical exercises of VR users using motion tracking, a proper analysis of the kinematics of individual joints provides the basis for broader conclusions. The objective of this study is to compare the range of motion measurements of the ankle joint obtained through two low-budget motion tracking systems, namely the Kinovea video system and the Vive Trackers sensor-based system using the eMotion measurement app. A comparison of the results of the range of motion in the ankle joint in the sagittal plane (dorsiflexion and plantar flexion) obtained through video analysis and data recorded by Vive Trackers Sensors was performed. For all measurements, the average difference in calculated values is 8.3°, with a standard deviation of 9.14°. The study showed relatively high agreement in measuring ankle joint angle values obtained by two inexpensive tracking methods while performing a motion task in footwear (4.26°). However absence of footwear is associated with a greater discrepancy in the results (14.26°). The Vive Trackers Sensors with the eMotion measurement app have the potential to be widely used in biomechanical applications. However, a larger study incorporating more complex movement sequences should be conducted.