A technique for motion capture of the finger using functional joint centres and the effect of calibration range of motion on its accuracy
A technique for motion capture of the finger using functional joint centres and the effect of calibration range of motion on its accuracy
复制标题
使用功能关节中心进行手指运动捕捉的技术以及运动校准范围对其准确性的影响
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
S. Lawson
中科院分区：
文献类型：
--
作者：
O. Warlow;S. Lawson
提出了一种利用立体摄影测量法进行手指运动分析的方法，称为密集阵变换技术。用功能方法确定关节轴，然后确定各指节的解剖坐标系。对13名受试者进行了测试，并评估了该技术的准确性。在使用生物力学模型时，手指三个关节的平均误差为0.6 mm，这意味着在预测关节反作用力时误差为2.2%。受试者需要在关节中有足够的运动来定义关节轴的功能。一些临床感兴趣的受试者可能由于受伤或病理而显著降低活动能力，因此，分析了校准运动范围对准确性的影响。研究发现，对于类风湿关节炎患者的典型活动范围，预测关节反作用力的误差<7%。与先前提出的其他技术相比，该技术的准确性更好，考虑到建模中固有的其他错误，本研究中发现的错误被认为是可以接受的。
A method of kinematic analysis of the fingers using stereo-photogrammetry, referred to as the phalanx transformation technique, has been proposed. Functional methods were used to define the joint axes and subsequently each finger segments’ anatomical coordinate system. Thirteen subjects were tested and the accuracy of the technique assessed. The average error across the three joints of the finger was found to be 0.6 mm, which translates to a 2.2% error in predicted joint reaction force when using a biomechanical model. The subjects were required to have sufficient movement in their joints to define the joint axes functionally. Some subjects of clinical interest can have a significantly reduced mobility owing to injury or pathology, therefore, the effect of calibration range of motion on accuracy was analysed. It was found that, for a range of motion typical of a subject with rheumatoid arthritis, the errors in predicted joint reaction force were <7%. The accuracy of this technique compared favourably with others previously proposed and, considering the other errors inherent in modelling, those found in this study were deemed to be acceptable.
DOI：
10.1115/1.2834888
发表时间：
1998-12-01
影响因子：
1.7
作者：
Andriacchi, TP;Alexander, EJ;Dyrby, C
通讯作者：
Dyrby, C
影响因子：
1.8
作者：
F. Su;Y. Chou;C. Yang;G. Lin;K. An
通讯作者：
F. Su;Y. Chou;C. Yang;G. Lin;K. An