Constrained least-squares optimization for robust estimation of center of rotation.

@article{Chang2007ConstrainedLO,
  title={Constrained least-squares optimization for robust estimation of center of rotation.},
  author={Lillian Y. Chang and Nancy S. Pollard},
  journal={Journal of biomechanics},
  year={2007},
  volume={40 6},
  pages={
          1392-400
        }
}
This paper presents a new direct method for estimating the average center of rotation (CoR). An existing least-squares (LS) solution has been shown by previous works to have reduced accuracy for data with small range of motion (RoM). Alternative methods proposed to improve the CoR estimation use iterative algorithms. However, in this paper we show that with a carefully chosen normalization scheme, constrained least-squares solutions can perform as well as iterative approaches, even for… CONTINUE READING
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