相关实验视频
Updated: May 13, 2025

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Movement Retraining using Real-time Feedback of Performance
Published on: January 17, 2013
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无标记和基于标记的运动分析的比较,考虑到局部参考框架方向的差异
Camilla Antognini1, Ariana Ortigas-Vásquez2, Christopher Knowlton3
1Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA; Department of Biomedical Engineering, University of Illinois at Chicago, Chicago, IL, USA.
Journal of biomechanics
|April 13, 2025
概括
无标记运动分析显示出有希望的结果,但注意到与基于标记的系统的差异. 应用参考框架对齐方法 (REFRAME) 显著改善了协议,表明大多数差异来源于局部框架方向差异.
科学领域:
- 生物力学 生物力学
- 运动分析 运动分析
- 运动学 运动学
背景情况:
- 无标记运动捕捉为基于标记的系统提供了替代方案.
- 之前的研究报告了无标记和基于标记的系统之间的动力信号差异.
- 这些差异的原因,特别是参考框架对齐,仍然被低估.
研究的目的:
- 系统地评估参考框架对齐不一致是否解释了无标记和基于标记的动力信号之间的差异.
- 将参考框架对齐方法 (REFRAME) 应用于没有标记的膝盖动力学数据.
- 确定REFRAME对无标记和基于标记的动态数据之间的协议的影响.
主要方法:
- 十个健康的受试者进行了行走试验.
- 使用无标记 (Theia3D) 和基于标记 (Qualisys) 的系统同时获取数据.
- 在Visual3D中应用REFRAME方法来对准局部坐标系统和动力学分析.
主要成果:
- REFRAME优化了无标记的动力信号,涉及骨和大腿骨坐标系统的平均旋转.
- 在REFRAME后的分析显示,在所有平面上,无标记数据和基于标记的数据之间的一致性有所改善.
- 平方根平均误差在斜面,正面和横面平面显著下降.
结论:
- 无标记和基于标记的动力学数据之间的大多数差异可能是由于局部定向不一致.
- REFRAME方法有效地减少了差异,提高了无标记运动分析的可靠性.
- 无标记的动力信号从根本上代表了与基于标记的系统相似的底层运动波形.
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