科尔沁沙地地物光谱数据分析

Spectral Data Analysis of Ground Objects in Kerqin Desertification Areas

根据测定各种地物的大量光谱数据 ,分析了内蒙古自治区奈曼旗荒漠化地区沙地、土壤、水体、水泥路面及部分植被的光谱特性及其变化规律 ,结果表明 ,研究区的水泥路面光谱变化均匀、平稳 ,是理想的光谱定标测试点。同时 ,利用导数和归一化的方法对植被光谱进行了处理 ,消除了因光照等因素造成的同一植被类型不同部位光谱的差异 ,从而提高了地物光谱重建的精度。

Based on a great deal of spectral data for different kinds of geo-targets, the spectral features and changing law of soil, sand, water, cement road and part of vegetations in desertification areas were analyzed. The result shows that the cement road is an ideal measure point for spectral calibration. In addition, differential calculation and normalize processing were used to remove the spectral difference of the same vegetation and obtained a satisfactory result. Therefore the precision of spectral rebuilding of geo-targets was improved.