地面成像和非成像地物光谱仪在不同水分环境下湿地植被光谱特征对比研究——以东洞庭湖湿地区域苔草植被光谱特征为例  

A Comparative Study on the Spectral Feature of Wetland Vegetation in Different Water Environments Based on Imaging and None-imaging Spectrometer:A Case Study of Sedge Spectral Features in Eastern Dongting Lake

作　　者：凌成星[1] 刘华[1] 鞠洪波[1] 张怀清[1] 由佳[1] 李伟娜[1] LING Chengxing;LIU Hua;JU Hongbo;ZHANG Huaiqing;YOU Jia;LI Weina(Institute of Forest Resource Information Techniques, CAF, Beijing 100091, China)

机构地区：[1]中国林业科学研究院资源信息研究所,北京100091

出　　处：《测绘与空间地理信息》2018年第4期1-4,7,共5页Geomatics & Spatial Information Technology

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(IFRIT201505)资助

摘　　要：利用SOC710VP成像光谱仪和ASD Field Spec 3地物光谱仪在湿地区域获取了典型湿地植被苔草光谱反射数据信息,比较了在不同水分环境下两个仪器在400—1 000 nm波长范围的光谱特征,对两种仪器的光谱结果进行了9种典型植被指数运算和比较。结果表明,在不同的水分环境下(土壤含水率51%、32%、14%三个区域比较分析)SOC710VP的反射率曲线和地物光谱仪ASD Field Spec 3的趋势相近,二者有很好的一致性,表现在550 nm和730 nm的反射峰,690 nm和970 nm的吸收谷,以及连续的近红外反射平台。二者也有非常明显的区别:1)SOC710VP在3个土壤水分环境下的苔草叶片光谱值都大于ASD Field Spec 3所采集到的苔草叶片光谱反射值;2)SOC710VP反射率曲线没有ASD Field Spec 3测出的原始光谱曲线平滑,波动幅度变化更大,在近红外波段较明显,变化更清晰,利于后续的光谱端元聚类分析。综上证明:成像光谱仪获取的数据具有图谱合一、光谱曲线特征可靠的特征,在湿地近地高光谱遥感研究中具有很大潜力,拓展了湿地资源遥感监测的技术手段。The objective of this study was to verify the application of imaging spectrometer in wetland vegetation remote sensing monitoring,based on analysis of wetland vegetation spectral features. Spectral information of Carex vegetation spectral data under different water environment was collected by SOC710 VP and ASD Field Spec 3; Meanwhile,the chlorophyll contents of wheat leaves were tested in the lab. A total 9 typical vegetation indices were calculated by using two instruments＇ data which were spectral values from 400 nm to 1 000 nm. Then features between the same vegetation indices and soil water contents for two applications were analyzed and compared. The results showed that there were same spectrum curve trends of Carex vegetation（ soil moisture content of 51%,32%,14%and three regional comparative analysis） reflectance between SOC710 VP and ASD Field Spec 3,including the two reflectance peak of550 nm and 730 nm,two reflectance valley of 690 nm and 970 nm,and continuous near infrared reflectance platform. However,The two also have a very clear distinction：（ 1） The reflection spectra of SOC710 VP leaves of Carex leaf spectra in the three soil moisture environment values are greater than ASD Field Spec 3 collected value;（ 2） The SOC710 VP reflectivity curve does not have the smooth curve of the original spectrum measured by the ASD Field Spec 3,the amplitude of fluctuation is bigger,and it is more obvious in thenear infrared band. It is concluded that SOC710 VP spectral data are reliable,with the image features,spectral curve features reliable.It has great potential in the research of hyper spectral remote sensing technology in the development of wetland near earth,remote sensing monitoring of wetland resources.

关 键 词：成像光谱仪 非成像光谱仪 湿地植被 水分环境 光谱特征 

分 类 号：P235.2[天文地球—摄影测量与遥感]