一种提高球形标靶点云数据质量和中心定位精度方法  

A Method of Improving Point Cloud Data Quality and Center Position Precision of Sphere Targets

作　　者：程舒[1,2] 花向红 丁凌航[1,2] 陈西江 CHENG Shu;HUA Xianghong;DING Linghang;CHEN Xijiang(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;Hazard Monitoring and Prevention Research Center,Wuhan University,Wuhan 430079,China School of Resource and Environment Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]武汉大学灾害监测和防治研究中心,湖北武汉430079 [3]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《测绘地理信息》2018年第6期86-90,共5页Journal of Geomatics

基　　金：国家自然科学基金资助项目(41674005,41374011,41304001,41174010);国家自然基金青年科学基金资助项目(41501502);长江科学院开放研究基金资助项目(CKWV2015230/KY)

摘　　要：基于球形标靶的点云配准过程中,获得高精度的球形标靶中心坐标十分关键。而球形标靶点云数据的质量直接关系到球面点中心坐标解算结果和精度,提出了基于邻域搜索的点云数据提取方法,给出了改进方法的基本思想和实施过程。在此基础上,提出了基于邻域定权的整体最小二乘球形靶标中心坐标解算模型和方法。通过实验结果表明,该方法不仅可以高效地获取高、精度的目标点云信息,而且可以提高球形标靶中心坐标获取的精度。Determination of highly precise coordinates of sphere target center is critical in point cloud registration based on sphere targets with regard to the quality of the point cloud used in data processing.First,the fundamental algorithm flow and executing process of an improved method of point cloud procurement based on searching neighbors is clarified,and based on that,a method of total least squares with weighing on the numbers of neighbors is used to locate sphere target centers.The results demonstrates that the method mentioned can obtain precise point cloud of sphere targets and improve the precision of coordinates of sphere target centers.

关 键 词：邻域搜索 点云提取 邻域定权 整体最小二乘 球形标靶中心坐标 

分 类 号：P237[天文地球—摄影测量与遥感] P207[天文地球—测绘科学与技术]