摘要
架空输电线路走廊内高杆树种的快速生长是引起的线路跳闸故障的重要因素,为提高线路安全,须快速提取输电线下树木的高度与覆盖宽带。基于激光雷达点云数据,通过不规则TIN格网方法精确构建树木形态特征;基于多光谱数据计算林区的NDVI构建树木的光谱特征,结合二者的优势,先通过CHM的极大值,判断出了树木的顶点;然后利用Voronio图进行空间分割,判断出树冠的范围;最后统计每个树冠多边形内CHM和NDVI情况,剔除非树木,得到有效的单木树木顶点及树冠多边形。
The rapid growth of tall tree species in overhead transmission line corridor is an important factor for the failure of circuit tripping. In order to improve the safety of the line, the height and canopy must be extrac- ted quickly. Based on the laser radar point cloud data, the tree morphological characteristics were precisely constructed by irregular TIN grid method. And the spectral characteristics of NDV[ in forest region based on muhispectral data were calculated. Combining the advantages of both characteristics, the vertex of the tree was determined through the maximum value of CHM, and the range of the canopy was speculated by using Voronio to space segmentation. Hence, it was possib eliminating the non- trees through the CHM le to obtain the effective single tree vertex and canopy polygons by and NDVI statistics data in each crown polygon.
作者
孙鸿博
杨扬
郭可贵
谭弘武
于旭宅
王瑞瑞
SUN Hongbo;YANG Yang;GUO Kegui;TAN Hongwu;YU Xuzha：;WANG Ruirui(National Grid General Aviation Co. Ltd. , Beijing 102209, China;China Power Finance Co. Ltd. , Beijing, 100005, China;State Grid Anhui Electric Power Company, Hefei 230061, Anhui, China;Beijing Yupont Electric Power Technology Co. Ltd. , Beijing, 100028, China;Beijing Key Laboratory of Precision Forestry, Beijing Forestry University, Beijing 100083, China)
出处
《中南林业调查规划》
2018年第2期30-33,55,共5页
Central South Forest Inventory and Planning
基金
中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室开放基金"岛礁多视立体影像的自动匹配方法研究"
北京林业大学优秀青年教师科技支持专项计划(YX2014-09)
关键词
架空输电线
形态特征
光谱特征
Voronio图
空间分割
overhead transmission lines
morphological characteristics
spectral characteristics
Voronio figure
space segmentation
