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Validity Verification of Human Pose-Tracking Algorithms for Gait Analysis Capability.

Tadamitsu Matsuda1, Yuji Fujino2, Hitoshi Makabe1

  • 1Department of Physical Therapy, Faculty of Health Science, Juntendo University, Tokyo 113-0033, Japan.

Sensors (Basel, Switzerland)
|April 27, 2024
PubMed
Summary

Two-dimensional (2D) gait analysis systems show promise for clinical use, demonstrating good agreement with 3D systems for time-distance parameters. Further improvements are needed for accurate joint angle measurements, especially for the hip.

Keywords:
gaithuman pose estimationmotion analysisvalidation

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Area of Science:

  • Biomechanics
  • Clinical Biomechanics
  • Motion Analysis

Background:

  • Two-dimensional (2D) clinical gait analysis systems offer advantages in cost and portability over traditional three-dimensional (3D) systems.
  • Validation of 2D systems against established 3D standards is crucial for their clinical adoption.

Purpose of the Study:

  • To statistically validate the Imasen and OpenPose 2D gait measurement systems against the Vicon 3D motion capture system.
  • To assess the accuracy of 2D systems in measuring temporal, distance, and joint angle parameters during walking.

Main Methods:

  • Comparison of 2D (Imasen, OpenPose) and 3D (Vicon) gait analysis systems.
  • Measurement of time factors, distance factors, and hip/knee joint angles in the sagittal plane.
  • Experiments conducted at varying speeds and gaits (normal, maximum, tandem) during level walking.

Main Results:

  • Intraclass correlation coefficients exceeded 0.769 for most gait parameters compared to Vicon, with exceptions in some knee joint angles.
  • Excellent relative agreement was found for time-distance parameters, and moderate-to-excellent for motion contraction ranges, excluding hip joint angles.
  • Correlation coefficients were high for time-distance parameters (>0.571) but lower for joint angles, particularly hip angles.

Conclusions:

  • 2D gait analysis systems demonstrate good reliability for time-distance parameters, supporting their clinical utility.
  • Further refinement of 2D models is necessary to improve accuracy in capturing hip and knee joint angles.
  • These findings guide future development for enhanced clinical application of 2D gait analysis.