植被覆盖区遥感生物地球化学异常信息提取

摘要

The abnormal levels of metals can cause biophysical, biochemical and canopy spectral variations of vegetation. The objective of this research is to use the Hyperion image for deriving geochemical anomaly information. This paper studies the vegetation remote sensing anomalies characteristics caused by the high background contents of copper, gold, nickel, chromium in Pulan copper mine in Yunnan Province, and selects three kinds of vegetation index, i. e. , EVI, CND1 and REPI, to extract bio-geochemical anomaly information. The results indicate that the chemical anomaly in the research area can be identified from Hyperion data, and that the geochemical anomaly information extracted from Hyperion data is largely consistent with the geological map and previous research results.%以云南普朗铜矿为研究对象,采用主成分分析算法,根据研究区区域上Cu、Au、Ni、Cr高背景及其引起的马尾松波谱异常特征,选择EVI、CNDI和REPI 3种植被指数来提取研究区Au、Cu等成矿元素生物地球化学异常信息.结果表明:通过计算,可对第一主成分(PCI)进行密度分割,获取生物地球化学异常信息,并绘制研究区地球化学异常专题图.