利用稳健WTLS方法进行三维激光扫描标靶球定位  

Spherical Target Positioning of 3D Laser Scanning by Using Robust WTLS Method

作　　者：王乐洋[1,2,3] 陈汉清[1,2] 林永达[1,2] 吴华玲[1,2,3] 

机构地区：[1]东华理工大学测绘工程学院,南昌市广兰大道418号330013 [2]流域生态与地理环境监测国家测绘地理信息局重点实验室,南昌市广兰大道418号330013 [3]江西省数字国土重点实验室,南昌市广兰大道418号330013

出　　处：《大地测量与地球动力学》2016年第8期745-749,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41204003);测绘地理信息公益性行业科研专项(201512026);江西省教育厅科技项目(GJJ150595;KJLD12077;KJLD14049);流域生态与地理环境监测国家测绘地理信息局重点实验室基金(WE2015005);对地观测技术国家测绘地理信息局重点实验室基金(K201502);东华理工大学博士科研启动基金(DHBK201113);江西省研究生创新专项基金(YC2015-S266;YC2015-S267);东华理工大学研究生创新专项基金(DHYC-2015005)~~

摘　　要：针对标靶球定位缺少有效的确定协因数阵方法的问题,顾及点到平面的距离反映了点与平面的相关性及入射角对点云数据点位精度的影响,将两者推广到三维激光扫描标靶球定位中。以距离、先验入射角确定各点协因数值,并给出观测向量协因数阵及系数矩阵协因数阵,利用稳健加权总体最小二乘方法进行标靶球定位。实例表明,以距离确定协因数阵的稳健加权总体最小二乘方法解算标靶球参数估计比其他方法更精确。We are concerned with the issue of lacking an effective method to determine the covariance matrix of coefficient matrix and observation vector in spherical target positioning.The distance from point to plane reflects the correlation of point and plane,and the incidence angle makes a difference to point clouds.We expand both of them to spherical target positioning.The covariance matrix of coefficient matrix and observation vector are provided.The robust weighted total least squares method is applied to spherical target positioning,which is based on weighted total least squares and setting certain criteria.Point clouds with outliers are conquered in this method.The experimental results show that robust weighted total least squares,which determined covariance by distance,is better than other methods in spherical target positioning.

关 键 词：标靶球定位 稳健加权总体最小二乘 距离 协因数阵 异常点 

分 类 号：P207[天文地球—测绘科学与技术]