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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。
Aiming at the problem that the point cloud of the slope is empty and unevenly distributed, and the surface model is not directly effective for the deformation analysis, a method of fast inverse reconstruction of the topographic point cloud by improved inverse distance weight interpolation is proposed. The NURBS surface model is established quickly and the deformation analysis is carried out from the surface, the line and the point. Finally, the consistency between the calculated result and the measured value is verified, The results show that the model meets the actual terrain changes and realizes the purpose of using the laser point cloud data to quickly construct the slope model and analyze the deformation.