基于包络线法的输电通道速生树种野外光谱特征分析

Analysis of Spectral Characteristics of Fast-growing Tree Species in Transmission Channels Based on Envelope Method

利用高光谱数据进行树种识别时,不同树种之间的可区分特征波段的选择尤为重要。本文利用广东省恩平市输电廊道内的速生树种及其他两种树种的地面实测光谱进行包络线变换,并利用均方差来衡量不同树种光谱反射率值之间的差异,以此来确定不同树种之间的可区分波段分布范围。实验表明:包络线去除法增大了4种植被波谱之间的差异。

When tree species identification is performed using hyperspectral data,the selection of distinguishable feature bands between different tree species is particularly important.In this paper,we use the measured spectra of fast-growing trees and other three tree species in transmission channels of Enping city,Guangdong province to transform the envelope,and use the mean squared error to measure the difference between the spectral reflectance values of different tree species to determine the range of distinguishable bands among different tree species.Experiments show that the envelope removal method increases the difference between the five plant spectral curves.