目的：评价数字标记点质心跟踪法在骨盆位移测量中的可靠性。

Objective: To evaluate the reliability of the digital marker tracing method combined with center-of-mass algorithm in measuring human pelvic displacement.

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自动网格法测量位移场需要预先在模型表面上布置人工标记点，通过分析标记点的变化来获得位移。

The mark spots are arranged on model surface by automated grid, and displacement field can be obtained by analyzing displacements of spots.

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