A data process of human knee joint kinematics obtained by motion-capture measurement

Abstract

Background The motion capture has been used as the usual method for measuring movement parameters of human, and most of the measuring data are obtained by partial manual process based on commercial software. An automatic kinematics data process was developed by programming on MATLAB software in this paper. Methods The motion capture measurement of healthy volunteers was carried out and the MATLAB program was used for data process. Firstly, the coordinate data of markers and anatomical points on human lower limb measured by motion capture system were read and repaired through the usual and the patch program. Meantime, the local coordinate systems of human femur and tibia were established with anatomical points. Then flexion/extension, abduction/adduction and internal/external rotation of human knee tibiofemoral joint were obtained by special coordinate transformation program. Results Using the above methods, motion capture measurements and batch data processing were carried out on squatting and climbing stairs of 29 healthy volunteers. And the motion characteristics (flexion/extension, internal/external rotation and adduction/abduction) of the knee joint were obtained. For example, the maximum internal/external rotation in squatting and climbing stairs were respectively was 30.5 degrees and 14 degrees, etc. Meantime, the results of this paper also were respectively compared with the results processed by other research methods, and the results were basically consistent, thus the reliability of our research method was verified. After calibration processing, the compiled MATLAB program of this paper can directly be used for efficient batch processing and avoiding manual modeling one by one. Conclusion A novel Patch Program of this paper has been developed, which can make reasonable compensation for missing and noise signals to obtain more complete motion data. At the same time, a universal data processing program has also been developed for obtaining the relative movement of various components of the human body, and the program can be modified for detail special analysis. These motion capture technologies can be used to judge whether the human body functions are abnormal, provide a reference for rehabilitation treatment and design of rehabilitation equipment, and evaluate the effectiveness before and after surgery.

Motion Capture Technology in Sports Scenarios: A Survey

“…In specific research scenarios, such as ballistic analysis in shooting or instant analysis of baseball swings, the sampling frequency may exceed 1000 Hz [16]. (4) Data processing: Data processing is relatively straightforward in indoor laboratory settings because the data in controlled environments are usually stable and accurate [85].…”

Multi-frame biomechanical and relaxometry analysis during in vivo loading of the human knee by spiral dualMRI and compressed sensing

“…Lastly, comparing our method to kinematic analysis would provide a more robust understanding on cartilage degeneration related to physical activities. Motion capture methods [68]- [70] can quantitatively analyze human physical movements and is widely being used on in vivo studies. It would be meaningful to apply both analysis and find a correlation between the biomechanical responses of a joint with the kinematical information to observe how the analysis evolves on patients with different degeneration levels.…”

Multi‐frame biomechanical and relaxometry analysis during in vivo loading of the human knee by spiral dualMRI and compressed sensing

“…Last, comparing our method to kinematic analysis would provide a more robust understanding on cartilage degeneration related to physical activities. Motion capture methods [75][76][77] can quantitatively analyze human physical movements and is widely being used on in vivo studies. It would be meaningful to apply both analysis and find a correlation between the biomechanical responses of a joint with the kinematical information to observe how the analysis evolves on patients with different degeneration levels.…”