农业机械学报2018，Vol.49Issue(2)：199-206,8.DOI:10.6041/j.issn.1000-1298.2018.02.026
地基激光雷达提取单木冠层结构因子研究
Extracting Crown Structure Parameters of Individual Tree by Using Ground-based Laser Scanner
摘要
Abstract
In traditional forest resources survey,it was hard to get tree structure parameters due to its different shapes and complex structures.Totally six stand trees were selected as a sample data in the campus of Beijing Forestry University.By using ground-based laser scanner as a tool to acquire single tree scanning point cloud data,the canopy gap fraction was calculated based on Lambert azimuthal equal area projection and stereographic projection;tree crown volume and surface area were extracted by two methods:irregular surface projection and voxel method by using cloud point data.The results showed that the average relative error of two methods for gap fraction was 0.03,and the extraction result using stereographic projection was smaller than that using Lambert azimuthal equal area projection;the relative error of crown volume of two kinds of extraction methods was 5.32％ ～ 12.43％,the average relative error was 9.29％,the relative error of the extracted crown surface area was 1.40％ ～ 5.21％,the average relative error was 3.33％.The difference between the results of the two methods were not very significant,therefore,the extraction of gap fraction,crown volume and surface area based on the use of the point cloud data can provide a more reliable data support for 3D green quantity,calculation of trees biomass,photosynthetic ability etc.关键词
地基激光雷达/冠层结构/树冠体积/树冠表面积/冠层孔隙度Key words
ground-based laser scanner/crown structure/crown volume/crown surface area/gap fraction分类
农业科技引用本文复制引用
王佳,张芳菲,高赫,吕春东..地基激光雷达提取单木冠层结构因子研究[J].农业机械学报,2018,49(2):199-206,8.基金项目
中央高校基本科研业务费专项资金项目(2015ZCQ-LX-01)和国家自然科学基金项目(41401650) （2015ZCQ-LX-01）
