多站三维激光扫描林木胸径精度分析  

Accuracy Analysis of DBH Based on 3D Laser Scanning of Multi-station

作　　者：熊伟 房新玉 刘杰[1,2,3] Xiong Wei;Fang Xinyu;Liu Jie(Tianjin Survey and Design Institute for Water Transport Engineering,Tianjin,China;Tianjin Key Laboratory of Surveying and Mapping for Waterway Transport Engineering,Tianjin,China;Tianjin Research Institute for Water Transport Engineering,Tianjin,China)

机构地区：[1]天津水运工程勘察设计院有限公司,天津 [2]天津市水运工程测绘技术重点实验室,天津 [3]交通运输部天津水运工程科学研究所,天津

出　　处：《科学技术创新》2023年第3期1-4,共4页Scientific and Technological Innovation

基　　金：2022年中央级公益性科研院所基本科研业务费专项基金资助项目“航道数字化精准引航系统关键技术及应用研究”项目编号:TKS20220302;2021年天津水运工程勘察设计院有限公司科研创新基金(发展基金)“基于超宽带的港口码头下空间定位关键技术研究”项目编号·SJY202109;2021年天津水运工程勘察设计院有限公司科研创新基金(发展基金)“港区地下排水管线的精细化探测与排水分析技术研究”项目编号:SJY202106。

摘　　要：针对多测站三维激光扫描林木获取胸径精度是否满足规范要求的问题,研究了多测站三维激光扫描林木胸径精度。首先通过站式三维激光扫描仪获取林木点云数据,经过配准、过滤、切割,获取可靠的胸径点云数据,然后采用最小二乘法拟合切片点云最优圆,计算获取林木胸径,最后以某一区域林木为试验对象,与人工量测对比,1 cm厚度切片点云测得的胸径最大差值为2.1 mm,最小差值为-9.2 mm,中误差为6.0 mm。结果表明,三维激光扫描简单实用,结果可靠,精度满足规范要求,可以代替人工测量方法用于林木胸径调查测量。研究结果对三维激光扫描技术在林木调查领域的应用有重要的借鉴意义。Whether the accuracy of 3D laser scanning forest trees to obtain diameter at breast height can meet the requirements of the specification is a problem,the problem is researched in this paper. The point cloud data of trees which obtained by the ground 3D laser scanner are accurately registration, filtering and cutting,then reliable DBH point cloud data are obtained. The least square method is used to fit the optimal circle of the slice point cloud, and the DBH of the tree is calculated.Finally, taking the forest trees in a certain area as the test object, compared with the manual measurement,it is found that the maximum difference of DBH measured by point cloud of 1 cm thick slice is 2.1 mm, the minimum difference is-9.2mm, and the mean square error is 6.0 mm.The results show that 3D laser scanning is simple and practical,and the results are reliable, the accuracy meets the specification requirements, which can replace the manual measurement method for the investigation and measurement of diameter at breast height of trees. The research results have important reference significance for the application of 3D laser scanning technology in forest investigation.

关 键 词：林木胸径 三维激光扫描 点云数据 精度 

分 类 号：S712[农业科学—林学] TN249[电子电信—物理电子学]