针对广西地形激光LiDAR点云滤波处理的研究及应用

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英文篇名：Research and application of Guangxi laser LiDAR point cloud filter processing 作者：刘润东 ; 范城城 ; 刘清 ; 李韬业 ; 麦超 ; 韦强 英文作者：LIU Run-dong;FAN Cheng-cheng;LIU Qing;LI Tao-ye;MAI Chao;WEI Qiang;Institute of the Guangxi Zhuang Autonomous Region Remote Sensing Information Surveying and Mapping; 关键词：机载激光雷达 ; 滤波 ; 分类地面点 ; 不规则三角网 ; 数字高程模型 英文关键词：LiDAR;;filtering;;classifying ground points;;irregular triangulation;;DEM 中文刊名：广西大学学报(自然科学版) 英文刊名：Journal of Guangxi University(Natural Science Edition) 机构：广西壮族自治区遥感信息测绘院; 出版日期：2019-06-25 出版单位：广西大学学报(自然科学版) 年：2019 期：03 基金：广西创新驱动发展专项(桂科AA18118038);; 广西重点研发计划项目(2017AB54078) 语种：中文; 页：129-135 页数：7 CN：45-1071/N ISSN：1001-7445 分类号：P237

摘要

机载LiDAR能够快速获取精确的高分辨率数字地面模型以及地面物体的三维坐标,是一种DEM数据快速生产的重要手段,在地球空间信息科学等领域具有广阔的发展前景和应用需求。然而在中国广西地区,由于地形地貌存在大量陡峭石山,地形破碎,以及部分地区植被十分茂密等特点,导致LiDAR数据的常规滤波算法将丢失大量地面点,增加人工编辑工作量,最终造成DEM生产质量不高。本文所提出的三个LiDAR点云数据精细化处理改进算法能够较好地识别这些特殊地形,采取一定的调整算法和处理,对陡石山进行重分类;对水体、断壁边界添加断裂线;对茂密植被区重新模拟地面,基本能大致修复丢失的地表,具有较强的实用性,也较大程度地提高了作业效率,尤其适合广西植被覆盖高、地形破碎、山地占比高的地区。
        The airborne LiDAR can quickly acquire accurate high-resolution digital ground model and three-dimensional coordinates of ground objects.It is an important means for rapid production of DEM data, and has broad development prospects and application requirements in the field of geospatial information science.However, in Guangxi, China, due to the existence of a large number of steep rocky mountains, broken terrain, and dense vegetation in some areas, the conventional filtering algorithm of LiDAR data will lose a lot of ground points, increase the labor of manual editing, and ultimately lead to the quality of DEM production. The improved algorithm of LiDAR point cloud data improved by the three algorithms proposed in this paper can identify these special terrain well, adopt certain adjustment algorithms and processing, reclassify the steep rock mountain, and add the fault line to the water body and the fault wall boundary; The dense vegetation area re-simulates the ground, which can basically repair the lost surface.It has strong practicability and greatly improves the operation efficiency.It is especially suitable for areas with high vegetation coverage, broken terrain and high mountain share in Guangxi.

引文

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