Airborne LiDAR and shipborne LiDAR measurement systems are commonly used methods to obtain point cloud data in coastal zones.The data measured by the two measurement systems have spatial differences and complementarity,which is of great significance for the registration of two types of non-homologous point clouds.In this paper,a point cloud registration method based on triangular facet was proposed.The target point cloud was divided into several irregular triangular facets according to the spatial distribution.Then,the point-area transformation model was used to minimize the distance between the measurement point in the source point cloud and the triangular facet at its plane location.Finally,the registration of coastal point clouds was achieved.The experimental results demonstrated that the mean error of sample point distance and the root mean square error of point-to-surface distance were reduced from 3.30 and 1.51 m to 0.76 and 0.17 m respectively.The registration algorithm based on triangular facets can effectively eliminate phenomena such as measurement gaps and angle deviations in non-homologous point clouds in coastal areas.
关键词
点云配准/海岸带/机载激光雷达/船载激光雷达/Delaunay不规则三角网
Key words
point cloud registration/coastal zone/airborne LiDAR/shipborne LiDAR/Delaunay triangle network
维普
万方数据