为研究直接线性变换算法中标定对三维重构精度的影响 ,对不同标定方法进行了分析探讨。并在此基础上研制了三维人体运动分析系统 ,进行了标定实验 ,取得了较为理想的测量结果。分析表明 :1)在三维测量中控制点应包含有效测量空间 ;2 )在测量空间内应尽可能多的均匀分布控制点。该三维人体运动分析系统经标定实验验证 ,测量相对误差小于 2 % ,具有较高精度 In order to study the influence of calibration in direct linear transformation algorithm on the accuracy of three-dimensional reconstruction, different calibration methods were analyzed and discussed. Based on this, a three-dimensional human motion analysis system was developed, calibrated experiment was carried out, and the ideal measurement result was obtained. The analysis shows that: 1) the control points should contain effective measurement space in the three-dimensional measurement; and 2) the control points should be evenly distributed in the measurement space as much as possible. The three-dimensional human motion analysis system verified by calibration experiments, the relative error is less than 2%, with high accuracy