TLS技术支持下的边坡点云重构与形变分析

针对边坡地形点云存在空洞、分布不均匀，以及直接建立表面模型进行形变分析效果差的问题，首先提出了一种改进反距离权重插值对地形点云快速压缩重构的方法，并以程序实现了该方法的自动化处理；然后快速地对压缩重构点云建立了NURBS曲面模型，并从面、线、点进行了全面形变对比分析；最后将计算结果与实测值进行了一致性检验，结果表明符合实际地形变化情况，实现了利用激光点云数据快速构建边坡模型并进行形变分析的目的。

Reconstruction of Slope Point Cloud and Deformation Analysis Based on TLS Technology

Aiming at the problem that not only the slope point cloud is void and uneven distribution,but also the effect of establishing the slope model directly and comparing analysis of deformation is poor,this paper puts forward a method which used an improved inverse distance weight interpolation to fast compress and reconstruct point cloud and procedures to achieve automated processing.Then it established the NURBS surface model fast based on the reconstructed point cloud cond compared analysis of deformation based on the NURBS surface model.The research achieved the purpose of using laser point cloud data to rapidly construct slope model and deformation analysis.By Riegl VZ-1000 scanners collected two point cloud data of a slope in mining subsidence area.The experimental analysis showed that the proposed method could implement quickly and automatically to compress and reconstruct the slope terrain point cloud.And the proposed method could implement quickly and accurately to build the slope model and from the surface,line,point to conduct a comprehensive analysis and comparison.The calculated results were in agreement with the measured values,and conformed to the actual terrain changes.The research of this paper supported the application of 3D laser scanner in slope deformation monitoring.