中国激光, 2018, 45 (11): 1110006, 网络出版: 2018-11-15
螺旋式扫描激光雷达数据的DEM内插算法
DEM Interpolation Algorithm of Data from Spiral Scanning Lidar
遥感 螺旋式扫描 激光雷达系统 三角网滤波 随机森林法 数字高程模型 remote sensing spiral scanning lidar system triangulation filter random forest method digital elevation model
摘要
提出一种螺旋式扫描机载激光雷达系统的数字高程模型(DEM)内插算法。首先,描述螺旋式扫描激光雷达系统的扫描特点,并阐述实时计算重叠区域的原理;然后,介绍改进的三角网迭代加密滤波法,并将其用于地面点与非地面点的分离;最后,基于随机森林法内插DEM。实验结果表明,该方法实现了螺旋式扫描机载激光雷达系统的DEM内插,且内插精度符合工业生产的数据要求。
Abstract
An algorithm for the digital elevation model (DEM) interpolation in the spiral scanning airborne lidar system is proposed. First, the scanning characteristics of this spiral scanning lidar system is described and the principle of real-time calculation of the overlapping area is clarified. Then the improved method of triangulation iterative encryption filtering is introduced and is also used to separate the terrestrial and non-ground points. Finally, the DEM interpretation is carried out based on the random forest. The experimental results show that with this method, the DEM interpolation in the spiral scanning airborne lidar system can be realized with an interpolation accuracy meeting the data requirements for industrial production.
杨书娟, 张珂殊, 邵永社. 螺旋式扫描激光雷达数据的DEM内插算法[J]. 中国激光, 2018, 45(11): 1110006. Yang Shujuan, Zhang Keshu, Shao Yongshe. DEM Interpolation Algorithm of Data from Spiral Scanning Lidar[J]. Chinese Journal of Lasers, 2018, 45(11): 1110006.