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无标记和基于标记的运动捕捉系统之间的动力学比较,用于改变方向的机动
Naoto Nishikawa1, Shun Watanabe2, Keizo Yamamoto1
1Graduate School of Lifelong Sport, Hokusho University, 23 Bunkyodai, Ebetsu, Hokkaido 069-8511, Japan.
无标记运动捕捉系统在改变方向 (COD) 动作过程中可靠地捕获动力数据,与基于标记的系统有很好的一致性. 然而,由于系统特定的差异,用户应谨慎地解释关节角大小.
科学领域:
- 生物力学和体育科学 生物力学和体育科学
- 运动分析技术 运动分析技术
背景情况:
- 基于标记器的动作捕捉用于3D分析具有诸如软组织文物和环境约束等局限性.
- 无标记运动捕捉提供了优势,包括没有标记,最小的会话间变化,和独立于服装,使其适合体育表现评估.
研究的目的:
- 在改变方向 (COD) 机动过程中,比较基于标记器和无标记器的运动捕捉系统之间的动态数据.
- 评估用于体育运动中COD分析的无标记系统的适用性和可靠性.
主要方法:
- 23名男性参与者进行了90度的COD机动.
- 使用基于标记 (运动分析) 和无标记 (Theia Markerless Inc.) 系统同时捕获动力学数据.
- 无标记系统使用深度学习,三角化和反向动力学;用于比较的是布兰德-阿尔特曼分析,ICC,RMSD和NRMSE.
主要成果:
- 两种系统对大多数干和下肢关节角度都表现出很好的一致性.
- 在脚的背部屈曲,膝盖屈曲和部外部旋转方面观察到显著的平均差异.
- 高的类内相关系数 (ICC > 0.75) 表明系统之间的测量可靠性很好.
结论:
- 无标记运动捕捉系统在COD机动期间捕获动力学模式的可靠性.
- 在无标记和基于标记的系统之间直接比较联合角度大小需要谨慎,因为已经确定了特定系统的差异.
- 当这些系统特异性差异被承认和考虑时,无标记系统是用于COD分析的有效工具.
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