【摘要】 植物发生病虫害时,叶绿素水平会出现不同程度的下降,这种下降通常表现为近红外波段的反射率下降,在近红外遥感图像上可以探测到这种变化。通过一元回归分析证实了虫害水平与植物近红外影像色调具有显著相关性,研究了反射率测定及相关分析中采样位置与植物病虫害水平信息的关系,并对区分虫害类型是否有助于提高相关性等进行了比较研究。最后通过给出描述虫害水平与植物近红外影像色调关系的定量表达式和开发出相应的采样分析软件,使遥感技术大面积、快速监测城市绿化植物虫情成为可能。更多还原

【Abstract】 The pertinence between the level of insect pests and the tone of host plants in remote sensing images was discussed in this paper.When the vegetation suffers from insect pests,its chlorophyll level will drop by different degrees,which will then be represented by descending in its near-infrared reflectivity by different degrees,and this kind of descending can be detected in near-infrared remote sensing images.It was confirmed that there was a remarkable pertinence between the level of insect pests and the tone of host plants in remote sensing images by dual regression analysis.In the same time,some other aspects that are related to the reflectivity were tested,such as where the best side of the image of a plant representing the level of insect pests is,whether it could improve the precision of the correlation analysis by dividing insects into different types.It is possible to investigate the insects on vegetables on the urban green lands by a large scale and with high efficiency by using remote sensing technique,because the quantitative correlation equations between the level of insect pests and the tone of vegetables in remote sensing images has been deduced and the program for sampling and analyzing has been developed.更多还原