三维激光扫描技术点云数据采集与配准研究

点云数据采集与配准的精度决定了建筑物三维建模的精度。围绕建筑物点云数据采集与配准的精度问题,分别采用基于标靶的模式、基于形状匹配的模式和基于测站后视的模式进行建筑物表面点云数据的采集与配准处理,并从配准精度、特征点、特征边3个方面进行了对比分析。结果表明,基于形状匹配的模式的精度较低,其他两种模式克服了"同名点"的问题,在配准精度上有明显优势;而在数据采集与配准整体效率方面,基于测站后视的模式优于其他两种模式。

Research on Point Cloud Data Acquisition and Rectification of 3D Laser Scanning Technology

The accuracy of point cloud data acquisition and rectification determines the 3 D model accuracy of building.Focusing on the acquisition and rectification accuracy of the building point cloud data,we used the targetbased model,the shape matching model and the rear-view model to collect and rectify the building surface point cloud data,and made comparative analysis from the rectification accuracy,feature point and feature edge.The results show that compared with the shape matching mode,the other two modes overcome the problem of"Same Point",and have obvious advantages in the accuracy of rectification,while the rear-view mode is better than the other two modes in the overall efficiency of data acquisition and rectification.