关键词: 三维扫描数据, 区域分割, 区域膨胀策略

Abstract: Considering that surface coarseness influences the performance of current 3D surface region segmentation and current algorithms can only handle the object with regular shape，flat surface and few broken surfaces，a surface segmentation method for 3D laser scanning data based on region dilation strategy is proposed，and this method segments the 3D laser scanning data into distinct region of similar orientation.Firstly，3D point clouds produced by 3D laser scanner are converted into polygon mesh.Then，normal vectors and areas of every polygon mesh are computed and some candidate regions are obtained using region dilation strategy.Finally，the 3D laser scanning data is segmented into regions of similar orientation after the elimination of the insignificant regions.The performance of proposed method is testified using 3D laser scanning data of actual objects，and the experimental results show that the proposed algorithm works well on various types of 3D laser scanning data.

Key words: 3D scanning data, region segmentation, region dilation strategy