摘要
对于地面三维激光扫描建模精度分析,除了需要对三维激光点云建模与全站仪建模进行比较分析外,还应当对点云数据曲面重建进行偏差分析。本文利用Geomagic Studio软件,对泥石流沟河滩处的3组不同分辨率的点云数据,分别就点、多边形和精确曲面等对象进行了一系列处理,得到了相应的NURBS曲面。以NURBS曲面为参考与原始数据进行偏差分析得到模型与点云的标准偏差。试验结果表明,根据不同分辨率点云数据的特点设置合理的参数得到的NURBS曲面,分辨率越高,曲面重建的标准偏差越小,精度越高。
For the accuracy analysis of ground 3 D laser scanning modeling,in addition to the comparative analysis of 3 D laser point cloud modeling and total station modeling, the deviation analysis of point cloud data surface reconstruction should also be carried out.Using Geomagic Studio software, three sets of point cloud data of different resolutions in the debris flow river beach are processed in a series of points, polygons and precise surfaces, and the corresponding NURBS surfaces are obtained.NURBS surface as the reference and original data to deviation analyse gets the standard deviation of the model and the point cloud.The test results show that the NURBS surface obtained by setting reasonable parameters according to the characteristics of point cloud data of different resolutions, higher resolution, and the smaller the standard deviation of surface reconstruction, the higher the precision.
作者
浦仕贵
甘淑
杨敏
PU Shi-gui;GAN Shu;YANG Min(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China;Plateau Mountain Spatial Information Survey Technique Application Engineering Research Center at Yunnan Province's Universities,Kunming 650093,China)
出处
《地质灾害与环境保护》
2020年第3期72-76,共5页
Journal of Geological Hazards and Environment Preservation
基金
国家自然科学基金项目,东川小江泥石流迹地的多尺度遥感探测试验分析研究(No.41861054)
国家自然科学基金项目,滇中星云湖高原湖泊流域聚落空间格局演化研究(No.41561083)。
