矿物岩石高光谱数据库分析

The Analysis of Mineral and Rock's Hyper-spectral Library

U SGS- MIN、JPL、JHU、IGCP- 2 6 4、ASTER等是当前国际上几个常用的光谱数据库。本文通过分析这些光谱库数据 ,发现某些矿物的光谱在不同光谱库中有较大的差异 ,甚至在同一光谱库中也有多种曲线形态。由此进一步分析并验证了由矿物组成的各类岩石在光谱特征上存在更大的变异。这些差异都会给高光谱遥感图像分析带来不利影响。文中讨论了影响矿物、岩石光谱特征的几个因素 ,并指出了建立光谱库的注意事项。

At present there are many hyper-spectral libraries used widely in the world, such as USGS_MIN, JPL, JHU, IGCP-264, ASTER ect. The paper analyses the data of spectal libraries, and find that the spectrum of a mineral in one library is different than in the other. Even in the same library the shape of a mineral's spectrum is various. On the basis of the fact, the author approves that the spectral features of rock, the composite of kinds of minerals, are more complicated and more prone to vary. The difference is hindrance to hyper-spectral analysis. The paper discusses the factors affecting the spectral features of mineral and rock, and points out the proceedings that should be paid more attention to when establishing a spectral library.