扫描线滤波算法可以在一定程度上简化滤波问题,并在复杂地形中可以取得较好的滤波效果,但该算法难以滤除一些地面下方的噪声点以及正、反坡度角相差较大的点。针对上述问题,提出顶点向量角-扫描线滤波算法,利用顶点向量角并结合高差阈值对扫描线进行后处理,可以进一步提高所提算法的滤波效果。通过实验将传统算法与改进后的算法进行对比,证明顶点向量角-扫描线滤波算法能够取得更佳的滤波效果。

The scan line filtering algorithm can simplify the filtering problem to a certain extent and achieve improved filtering results in complex terrains. However, it is difficult to filter out some noise points under the ground and points with large difference between positive and negative slope angles. To resolve these problems, a vertex vector angle-scan line filtering algorithm is proposed, where the vertex vector angle and height difference threshold are used to perform postprocessing on the scan line, further improving the filtering effect. The traditional algorithm is compared with the improved algorithm through experiments, proving that the latter can achieve improved filtering results.