辣椒、水稻与烤烟叶片反射光谱特征的比较研究

Comparative Study on Leaf Reflectance Spectrum Characteristics of Pepper,Rice,Tobacco

在350-2 500nm波长范围内研究了辣椒、水稻和烤烟3种作物的叶片光谱特征.结果表明,依据350-2 500nm波段范围内的叶片光谱反射率曲线,可以容易将水稻从辣椒和烤烟中区别出来;辣椒和烤烟能依据350-759nm以及1 554-1 775nm波段的反射率进行区别.根据蓝边幅值Db,蓝边位置λb,黄边幅值Dy,红边幅值Dr,红边位置λr,绿峰反射率ρg,红谷反射率ρr,比值植被指数RVI,归一化植被指数NDVI,差值植被指数DVI,绿波段归一化植被指数NDVIg和绿波段比值植被指数RVIg12个指标之一或全部可以快速识别水稻;辣椒和烤烟则能依据Db,λr,ρg,ρr,RVI,NDVIg和RVIg7个指标之一或全部进行识别.这为高光谱技术识别这3种作物提供了依据.

The spectral features of leaves from pepper,rice and tobacco were studied at the resolution in350-2 500 nm.Results show that,according to the leaf spectral reflectance curves in 350-2 500 nm,rice can easily be distinguished from pepper and tobacco;pepper can be distinguished from tobacco only on the basis of the leaf spectral reflectance in 350-759nm and 1 554-1 775 nm.Rice can be quickly identified according to one or all of Db,λb,Dy,Dr,λr,ρg,ρr,RVI,NDVI,DVI,NDVIgand RVIg.Pepper and tobacco can be identified only according to one or all of Db,λr,ρg,ρr,RVI,NDVIg and RVIg.