直接线性变换法中标定对三维重构精度的影响

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

Influence of calibration on the accuracy of 3-D reconstruction in direct linear transformation algorithm

Influence of calibration on the accuracy of 3 D reconstruction was discussed through the analysis and comparison of different calibration methods. The results were used to develop a 3 D human motion analysis system with satisfactory results achieved using the calibration experiment. The results show that 1) in 3 D measurement, the space constituted by all the reference points should wrap the potential measured space where the motion to be investigated will take place; 2) the reference points should be evenly and uniformly distributed in the potential measured space with a greater point density than outside the space. The calibrated 3 D human motion analysis system is very accurate with a relative error of less than 2%.