直接线性变换法中标定对三维重构精度的影响  

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

作　　者：杨年峰[1] 王季军[1] 黄昌华[1] 王人成[1] 金德闻[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《清华大学学报（自然科学版）》2000年第4期24-27,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金项目!(59905015);科技部重点攻关项目!(96-920-20-14)

摘　　要：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 % 。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%.

关 键 词：直接线性变换算法 三维重构 人体运动分析 

分 类 号：G804.21[文化科学—运动人体科学]