基于ETM^+和ASTER数据的矿化蚀变信息提取

Information Extraction of Mineralized Alteration Based on the ETM^+ and ASTER Data

选用ETM+和ASTER影像作为数据源,以西藏某矿区为例,在分析影像波谱特征的基础上,运用比值法、主成分分析等方法进行了矿化蚀变信息提取研究;对不同数据源提取的蚀变信息结果进行空间叠加分析,定量化地分析叠加蚀变信息,从而确定基于不同数据源、不同蚀变信息提取方法的综合蚀变异常信息,提高了矿化蚀变信息提取的准确性与可靠性。

Choosing ETM + and ASTER image as the data source,taking a mining area of Tibet as an example,based on the analysis of image spectral features,this paper used the ratio method,principal component analysis method to extract the mineralized alteration information.It spatial overlay analyzed the result of alteration information from different data sources extracted,and quantitative analyzed the superimposed alteration information.And then the comprehensive altered anomaly information was got based on different data sources and method of alteration information extraction,which would improve the accuracy and reliability of the mineralization alteration information extraction.