基于三维激光扫描成像系统的树冠生物量研究

林业中对树冠进行准确量测一直都难以实现,对树冠体积、表面积的估测也多是将树冠近似为规则几何体,所得到的数据偏差较大,使与树冠相关的一些研究受到限制.该文将三维激光扫描成像系统运用于立木测量,建立立木三维模型,通过对模型进行量测获取包括树冠体积、表面积等各种测树因子.以此为基础,运用非线性回归方法建立树冠体积、表面积回归方程,相关系数都在0.95左右.利用树冠体积、表面积回归模型,可以用传统林业调查数据推算树冠的体积表面积,可以使与树冠相关的估测、研究得到较好的结果.同时该文将树冠因子引入生物量模型,建立包含树冠体积、表面积的生物量模型,获得了较传统CAR模型更好的效果,可作为生物量估测的基本模型.

An estimation of tree canopy biomass based on 3D laser scanning imaging system.

It is difficult to precisely measure the tree canopy,which is always considered as a regular shape in the estimation of the volume and surface area of it.As a result,the data are not precise and subsequently,the related studies are limited.In this study,3D laser scanning imaging system was used in the measurement of trees and 3D tree model was established.Tree volume and surface area were obtained by measuring the 3D tree model.Using the scanning data,the volume and surface area equation were set up and the correlation coefficient was about 0.95.Then the volume and surface area were calculated using the traditional survey data,and the researches about tree canopy obtained much better results.The biomass models,with the canopy volume and surface area as parameters,are better than the traditional CAR model and can be used as the basic biomass model.