[1]霍达,邢艳秋*,田昕,等. 基于机载LiDAR的四次多项式拟合法估测单木冠幅[J].西北林学院学报,2015,30(03):164-169.[doi:doi:10.3969/j.issn.1001-7461.2015.03.28]
 HUO Da,XING Yan-qiu*,TIAN Xin,et al. Estimating Individual Tree Crown Diameter Using Fourth Fegree Polynomial Fitting Method Based on Airborne LiDAR[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2015,30(03):164-169.[doi:doi:10.3969/j.issn.1001-7461.2015.03.28]
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 基于机载LiDAR的四次多项式拟合法估测单木冠幅()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第30卷
期数:
2015年03期
页码:
164-169
栏目:
出版日期:
2015-05-31

文章信息/Info

Title:
 Estimating Individual Tree Crown Diameter Using Fourth Fegree Polynomial Fitting Method Based on Airborne LiDAR
文章编号:
1001-7461(2015)03-0164-06
作者:
 霍达1邢艳秋1*田昕2尤号田1赵晨阳1胡洋1
 (1. 东北林业大学 森林作业与环境研究中心,黑龙江 哈尔滨 150040; 2. 中国林业科学研究院 资源信息研究所,北京 100091)
Author(s):
 HUO Da1 XING Yan-qiu1* TIAN Xin2 YOU Hao-tian1 ZHAO Chen-yang1 HU Yang1
 (1.Research Center of Forest Operation and Environment, Northeast Forestry University, Harbin, Heilongjiang 150040, China; 2. Research Institute of Forest Resource Information Techniques, CAF, Beijing 100091, China)
关键词:
 小光斑激光雷达冠幅单木四次多项式拟合树高
Keywords:
 small-footprint LiDAR crown diameter individual tree fourth degree polynomial fitting tree height
分类号:
S758.1
DOI:
doi:10.3969/j.issn.1001-7461.2015.03.28
文献标志码:
A
摘要:
 小光斑激光雷达已被广泛用来估测森林参数,为了进一步提高其估测单木的精度,选取了内蒙古依根试验区野外测量的单木数据和机载LiDAR数据,提出了四次多项式拟合法。该方法首先以单木顶点为中心在CHM上提取东西、南北2个方向的高程数据。然后分别得到2组数据的四次多项式拟合曲线,曲线中两凹点之间的水平距离为该方向的冠幅值。最终将2个方向的均值作为单木冠幅估测值,冠幅估测值的平均绝对误差为0.99 m。
Abstract:
 Currently, the small-footprint LiDAR has been widely used to estimate forest parameters. In order to further improve the estimate accuracy of individual tree, field measured individual tree data and airborne LiDAR data in Eagan area of Inner Mongolia were selected, and a fourth degree polynomial fitting method was put forward. In the method, firstly, the top of individual tree was centered, elevation data on Canopy Height Model (CHM) at the north-south and the east-west directions were extracted. Secondly, two fourth degree polynomial fitting curves were extracted on the two group data, respectively. The horizontal distance between two pits on the curve was considered as crown diameter at this direction. Finally the crown diameter was calculated as the average of two values measured along two directions. The analysis showed that mean absolute error of individual crown diameter was 0.99 m.

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备注/Memo

备注/Memo:
 收稿日期:2014-08-10 修回日期:2014-10-03
基金项目:“973” 国家重点基础研究发展计划项目(2013CB733400);国家自然科学基金(41171274)。
作者简介:霍达,男,在读硕士,研究方向:森林管理与林业信息工程。E-mail:huohuoda@hotmail.com
*通信作者:邢艳秋,女,博士,教授,研究方向:森林管理与林业信息工程。E-mail: yanqiuxing@nefu.edu.cn
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