Bone length calibration can significantly improve the measurement accuracy of knee flexion angle when using a marker-less system to capture the motion of countermovement jump
| Autor: | Stephen Smith, Mark McGroarty, Friedrich Wetterling, Dara Meldrum, Stuart O'Brien, Susan Giblin, Karl Grogan, Simon Rand |
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| Rok vydání: | 2016 |
| Předmět: |
030222 orthopedics
Accuracy and precision Computer science Anterior cruciate ligament Biomechanics 030229 sport sciences Motion capture Motion (physics) Bone length 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure medicine Jump Calibration Simulation Biomedical engineering |
| Zdroj: | BHI |
| DOI: | 10.1109/bhi.2016.7455917 |
| Popis: | Marker-less motion capture systems can provide online recordings of human biomechanics during rapid dynamic exercises such as countermovement jump (CMJ) which could indicate an athlete's risk of injury to the anterior cruciate ligament (ACL). However, without additional postprocessing the localisation accuracy of the joints can be insufficient. Subsequently, biomechanics measurements, e.g. knee flexion angles, can be severely corrupted. We propose a calibration algorithm to correct for deviations in the bone length during CMJ as recorded by a low cost marker-less motion capture system (i.e. Kinect, version 2). Results were compared to gold standard VICON measurements. In this single subject study of three CMJs the accuracy of the measured knee flexion angle during stabilisation (post jump) was significantly improved from −9.6° to −3.8° (p |
| Databáze: | OpenAIRE |
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