三因素及其交互作用对植物叶片多角度偏振高光谱特征的影响

在反射、散射和透射电磁辐射的过程中,植物叶片表面将产生与它们自身性质有关的偏振特征,完全可以作为遥感信息中有价值的信息来源.多角度对地观测能获得更为详细可靠的地面目标三维空间结构参数,使定量遥感成为可能.对植物叶片的多角度偏振高光谱探测成为定量遥感中的一种新手段.在分析植被叶片的多角度偏振高光谱特征基础之上,设计了一个3因素2水平的正交试验.通过对实验数据的方差分析发现,偏振角、入射天顶角、叶绿素以及三个因素之间的交互作用都可以对植物叶片的偏振反射产生影响,偏振角和入射天顶角对植物叶片的影响特别显著,二者的交互作用也有显著的影响.因此在今后的研究中,既要考虑单因素本身对植被叶片的偏振反射的影响,还要考虑到交互作用所起到的影响.

Effects of Three Interactive Factors on the Multi-Angle Polarized Hyperspectrum of Vegetation leaves

Polarized features come from the surface of vegetation leaves in the process of reflectance, scattering and transmission of electromagnetic radiation, which could be important information. It is possible for quantitative remote sensing that observation of multi-angle reflection can provide enhanced information from directional observations of an earth target. Reliable information of 3-D spatial structure has advantages than single directional observation for improving remote sensing technology. It is a new method for quantitative remote sensing to detect the multi-angle polarized hyperspectrum of the vegetation leaves. In this paper, we have designed an orthogonal, two level test having three factors on the basis of analyzing clove leaves spectrum. Analysis of variance shows that polarized angle, incidence viewing azimuth, and the chlorophyll and their interactions have impacts in our experiment, especially polarized angle, incidence viewing azimuth and the their interaction effect have Particularly significant for the clove leaves. Hence we should consider the interaction effects in the vegetation leaves polarized reflectance in the future studies.