Characterization of the Rice Canopy Infested with Brown Spot Disease Using Field Hyperspectral Data  

作　　者：ZHAO Jinling ZHANG Dongyan LUO Juhua DONG Yingying YANG Hao HUANG Wenjiang 

机构地区：[1]Beijing Research Center for Information Technology inAgriculture, Beijing Academy of Agriculture and ForestrySciences, Beijing 100097, China [2]. Institute of Remote Sensing Applications, Chinese Academyof Sciences, Beijing 100101, China

出　　处：《Wuhan University Journal of Natural Sciences》2012年第1期86-92,共7页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foundation of China (41071276 and 41101395);China Postdoctoral Science Foundation (20110490317);Postdoctoral Science Foundation of Beijing Academy of Agriculture and Forestry Sciences (2011)

摘　　要：Based on the field hyperspectral data from the analytical spectral devices （ASD） spectrometer, we characterized the spectral properties of rice canopies infested with brown spot disease and selected spectral regions and bands sensitive to four severity degrees （severe, moderate, light, and healthy）. The results show that the curves＇ variation on the original and the first- and second-order de- rivative curves are greatly different, but the spectral difference in the near-infrared region is the most obvious for each level. Specifically, the peaks are located at 822, 738, and 793 nm, while the valleys are located at 402, 570, and 753 run, respectively. The sensitive regions are between 430-520, 530-550, and 650-710 nm, and the bands are 498, 539, and 673 nm in the sensitivity analysis, while they are in the ranges of 401-530, 550-730 as well as at 498 nm and 678 nm in the continuum removal.Based on the field hyperspectral data from the analytical spectral devices （ASD） spectrometer, we characterized the spectral properties of rice canopies infested with brown spot disease and selected spectral regions and bands sensitive to four severity degrees （severe, moderate, light, and healthy）. The results show that the curves＇ variation on the original and the first- and second-order de- rivative curves are greatly different, but the spectral difference in the near-infrared region is the most obvious for each level. Specifically, the peaks are located at 822, 738, and 793 nm, while the valleys are located at 402, 570, and 753 run, respectively. The sensitive regions are between 430-520, 530-550, and 650-710 nm, and the bands are 498, 539, and 673 nm in the sensitivity analysis, while they are in the ranges of 401-530, 550-730 as well as at 498 nm and 678 nm in the continuum removal.

关 键 词：rice brown spot disease sensitive bands disease severity degree derivative transformation spectra continuum removal method sensitivity analysis method 

分 类 号：S127[农业科学—农业基础科学]