ArticleAnnals of biomedical engineering2025
Dual-Camera Markerless Motion Capture System for Precise Lower-Limb Kinematic Analysis in Osteoarthritis.
Article in Annals of biomedical engineering, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The trial behind it
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Who cites it
2 citing papers in PubMed.
- Markerless Motion Capture for Human Movement Estimation Using Artificial Intelligence: A Systematic Review.Pediatric reports · 2026Review
- Optimizing camera placement in multi-view markerless motion capture: a validation study against gold-standard kinematics for static and dynamic tasks.BMC research notes · 2026Article
Corrections and comments
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Authors and funding
6 authors.
Funding
Abstract
purposeThis study aimed to develop a dual-camera markerless system based on data from patients with osteoarthritis (OA) and validate its agreement with a marker-based motion capture system for measuring lower-limb kinematics.
methodsA total of 152 OA patients were divided into a training set (n = 120) and a test set (n = 32). Kinematic data during gait were collected simultaneously via both markerless and marker-based systems. The dual-camera markerless system consists of a 2D pose extractor based on a neural network and 3D triangulation, and the kinematic differences between the two systems were evaluated via the root mean square distance (RMSD) and root mean square error (RMSE) and intraclass correlation coefficient (ICC).
resultsThe markerless system demonstrated great performance, achieving a grand mean RMSD of 11.0 mm and an ICC of 0.95 for keypoints. Joint angle analysis revealed a mean RMSE of 4.25°, with ICC values for joint angle waveforms reaching 0.90 in the sagittal plane, 0.48 in the frontal plane, and 0.24 in the transverse plane compared with the marker-based system.
conclusionThese results indicate that the dual-camera markerless system provides accurate lower-limb kinematic measurements for patient populations while offering significant advantages in terms of cost-effectiveness, installation simplicity, and reduced operational expertise requirements, facilitating efficient biomechanical assessment in clinical use.
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Registered trials
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