雅安市雨城区几种常见乔木树种夏季光谱特征分析.docVIP

雅安市雨城区几种常见乔木树种夏季光谱特征分析 ———————————————————————————————— 作者： ———————————————————————————————— 日期： 雅安市雨城区几种常见乔木树种夏季光谱特征分析 李红 专业：林学〔经济林方向〕 学号 指导教师：赖家明 摘要：本文以四川省雅安市雨城区为例，利用ASD地便携式光谱仪对雨城区几种常见乔木树种的反射光谱进展了测定。对目的树种光谱特征、光谱反射一阶导数特征以及光谱反射二阶导数特征进展了分析。研究说明：常绿阔叶林、针叶林树种种间光谱反射率混淆严重，难以区分；根据其光谱反射率在750~1100nm范围上反射率大小，可以总结为：构树＞香樟＞巨桉＞梨树＞杉木＞柳杉＞马尾松＞侧柏。在反射光谱的一阶导数和二阶导数特征的研究中发现巨桉、香樟、梨树、构树、杉木、柳杉、侧柏等树种具有独特的光谱一阶导数特征，马尾松具有独特的光谱二阶导数特征，通过建立对应的光谱反射一介导数和二阶导数模型，可以将其信息提取识别。 关键词：光谱特征，树种识别，光谱微分 spectral analysis of several kinds of common tree species in summer in Yaan Yucheng District Forestry(Economic forests) Li hong Instructor: Lai Jiaming Abstract: This paper Sichuan Province Yucheng District, for example, the use of portable objects ASD spectrometer to the main tree species in their reflectance spectra were measured; on the main spectral characteristics of forest tree species, the first derivative spectral reflectance characteristics, and the second derivative spectral reflectance characteristics were analyzed. The results show that: evergreen broadleaf forest, coniferous forest tree species in a serious confusion between the spectral reflectance is difficult to distinguish. According to their spectral reflectance in750 ~ 1100nm range on the size of the reflectivity, can be summed up: Broussonetia papyrifera＞Camphor＞Eucalyptus grandis＞Pear tree＞Fir wood＞Cryptomeria fortunei＞Masson Pine＞Oriental Arborvitae. In the reflection spectrum the first derivative and second derivative features in the study found Broussonetia papyrifera, Camphor, Eucalyptus grandis, Pear tree, Fir wood, Cryptomeria fortunei, Oriental Arborvitae have unique spectral characteristics of the first derivative; Masson Pine have unique spectral characteristics of the second derivative. through the establishment of the corresponding reflectance ordinary derivative and second derivative model identification can be extracted. Key words：spectral characteristics, species identification, spectral deriv