锡林郭勒盟典型草原区植被光谱特征研究

RESEARCH ON THE SPECTRAL CHARACTERISTIC OF TYPICAL STEPPE IN XILINGUOLE COUNTY INNER MONGOLIA

根据所测定的各种地面植被的大量光谱数据,分析了内蒙古自治区锡林郭勒盟境内典型草原区各种植被的光谱特性及其变化规律。同时,利用导数和归一化的方法对植被光谱反射曲线进行了处理,消除了因背景、光照等因素的不同而造成的同一植被类型在不同测定条件下带来的光谱曲线上的差异。不过应当注意到:无论是哪种处理方法,其处理结果所得到的光谱值已经不是真正的光谱反射率值了。所以在应用时,对应的图像数据也应做相应的变换处理。

Based on the great deal of variety of plant vegetations spectral data that already existing in databank, vegetation conditions of the typical Steppe in Baiyinxile Ranch in Inner Mongolia Autonomous Region were examined. At the meanwhile, the interrupted light spectra were processed by the methods of Derivative and Normalization, and the elements of noises and deflections caused by different scanning conditions such as soil background and shining were eliminated. However, cautions need to be paid to that the results of these treatments are no longer the first hand reflective spectra, regardless of what treatment applied. So, corresponding to different transformations, the images need to be modified accordingly.