摘要
针对平面标靶和球标靶拟合中最小二乘方法和总体最小二乘方法存在的问题,提出了一种加权总体最小二乘的拟合方法,根据点云激光反射强度以及对系数阵A列向量部分修正引入权阵P、PX、P0,建立较LS方法和TLS方法更加合理的模型,并给出相应的迭代算法。经实例计算证明加权总体最小二乘方法更加合理,可以获得更高精度的参数解。
According to the different laser reflection intensity of each cloud point and correcting parts of the coefficient matrix A column vectors, the weighted total least-square (WTLS) methods in the plane target and sphere target fitting of the terrestrial laser scanning is introduced, a more reasonable model than the least-square (LS) methods and the total least-square (TLS) methods is established, and the corresponding iterative algorithm is given. The calculated example proves that the model is more reasonable indeed and the more accurate parameters solution can be obtained with WTLS.
出处
《大地测量与地球动力学》
CSCD
北大核心
2010年第5期90-96,共7页
Journal of Geodesy and Geodynamics
关键词
点云
EIV模型
标靶拟合
总体最小二乘
加权总体最小二乘
point cloud
Error-In-Variables ( EIV ) model
target fitting
total least-square ( TLS )
weighted total least-square (WTLS)
作者简介
陈玮娴,女,1987年生,硕士,研究方向:大地测量与测量工程专业数据处理.E—mail:15531422@qq.com