CAJ | 학술논문

以柑橘树冠层光谱为例，通过对HJ-1A星HSI传感器所采集的柑橘高光谱遥感数据与ASD便携式手持光谱仪所采集的地面实测柑橘冠层光谱进行比较，旨在探究HJ-1A星高光谱数据反演柑橘光谱的可靠性与适用性。结果表明：ASD与HSI数据的柑橘光谱反射率存在差异，尤其在红光波段和近红外波段有显著差异；ASD数据的光谱反射和吸收特征都较HSI数据明显；ASD与HSI数据的柑橘光谱变量特征也存在差异，尤其是黄光波段微分值造成的光谱变量差异最明显。因此，在进行小区域尺度柑橘光谱研究时不宜采用HSI测得的柑橘冠层反射光谱数据，但通过适当地改进HSI数据预处理方法，在大区域尺度上HSI数据能较为准确地表现柑橘光谱吸收、反射、红边等特征，可以应用于柑橘植被指数的反演研究。
이감귤수관층광보위례，통과대HJ-1A성HSI전감기소채집적감귤고광보요감수거여ASD편휴식수지광보의소채집적지면실측감귤관층광보진행비교，지재탐구HJ-1A성고광보수거반연감귤광보적가고성여괄용성。결과표명：ASD여HSI수거적감귤광보반사솔존재차이，우기재홍광파단화근홍외파단유현저차이；ASD수거적광보반사화흡수특정도교HSI수거명현；ASD여HSI수거적감귤광보변량특정야존재차이，우기시황광파단미분치조성적광보변량차이최명현。인차，재진행소구역척도감귤광보연구시불의채용HSI측득적감귤관층반사광보수거，단통과괄당지개진HSI수거예처리방법，재대구역척도상HSI수거능교위준학지표현감귤광보흡수、반사、홍변등특정，가이응용우감귤식피지수적반연연구。
The purpose of this paper is to explore the reliability and applicability of the HJ-1A star hyper spectral data and provide scientific reference for the futher research of scale transformation problem between the in-situ measured and the remote sensing image. The HSI image is treated with the process of Absolute Value Conversion, Strip Removal, Flaash Correction and Geometric Correction. Then the citrus spectral reflectance is inversed by the treated HSI image. The in-situ citrus spectral are measured by ASD FieldSpec HandHeld spectrometer. The comparison results show that:First, the ASD and the HSI data of citrus spectral reflectance are different, especially in the red band and near-infrared band has significant difference; Second,spectral reflection and absorption characteristics of ASD data are more clearly than HSI data;Third, the spectral variables of two data are also different,which is caused by the SDy. Therefore, it should not be using HSI spectral reflectance data in the study of small regional scale, but if the quality of HSI is improved, the HSI data is able to used for inversion vegetation index in large scale.