Position: Home > Articles > Tridimensional Green Biomass Measurement for Trees Using 3-D Laser Scanning
Transactions of the Chinese Society for Agricultural Machinery
2013,44
(8)
229-233
基于三维激光扫描的树木三维绿量测定
作 者：
王佳;杨慧乔;冯仲科
单 位：
北京林业大学测绘与3S技术中心
关键词：
树木三维绿量;三维激光扫描;树冠体积;绿视率
摘 要：
利用三维激光扫描仪获取单株树木的点云数据,通过点云数据的处理提取测树因子,将树冠分割为多个不规则的台体,对每个台体的体积加和,近似为树冠体积。同时将绿视率引入三维绿量的计算中,以树冠不同视角绿视率加权平均和与树冠体积相乘计算树木三维绿量。实验选取了6个树种、共13棵树的点云数据,以树冠体积和绿视率2种方法计算三维绿量,结果表明:单纯以树冠体积计算平均三维绿量,针叶树大于阔叶树;而通过绿视率计算,阔叶树绿视率为55.41%,平均三维绿量为253.02 m3,而针叶树绿视率为30.75%,平均三维绿量为146.75 m3,不论是绿视率或者三维绿量,阔叶树均大于针叶树,与传统方法相比更符合树木的实际情况。
译 名：
Tridimensional Green Biomass Measurement for Trees Using 3-D Laser Scanning
作 者：
Wang Jia Yang Huiqiao Feng Zhongke(Institute of GIS,RS & GPS,Beijing Forestry University,Beijing 100083,China)
关键词：
Tridimensional green biomass of trees 3-D laser scanning Crown volume Green looking rate
摘 要：
A method applying 3-D laser scanning to estimate tridimensional green biomass of individual trees was proposed.For each objective tree,some tree parameters were obtained such as height,diameter at breast and crown width of an individual tree from cloud points,which were gotten from 3-D laser scanning.Then,through dividing crown into a plurality of irregular bodies,the volume of crown was regarded as the summation of volume of each body.Finally,the product of tridimensional green biomass and weighted average green looking rate from different perspectives and volume of tree crown was obtained.The method was tested on 13 trees,6 species,and the results showed that the average tridimensional green biomass of broadleaf trees was 253.02 m3 and 146.75 m3 for coniferous trees.It was obvious that the average tridimensional green biomass of broadleaf trees was bigger than coniferous ones,which was contrary to results from traditional method.
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