| 主成分分析法在TM遥感影像蚀变信息提取中的应用 |
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| 引用本文： | 李闵佳,刘军旗,李星,张浩峰. 主成分分析法在TM遥感影像蚀变信息提取中的应用[J]. 黑龙江大学自然科学学报, 2012, 0(4): 546-550,555 |
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| 作者姓名： | 李闵佳 刘军旗 李星 张浩峰 |
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| 作者单位： | 中国地质大学(武汉)计算机学院;中国地质大学(武汉)教育部三峡地质灾害研究中心;中国地质大学(武汉)数理学院 |
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| 基金项目： | 国务院三峡库区地质灾害防治工作指挥部重点资助项目(SXJC-3ZH1A6) |
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| 摘 要： | 基于江西大余西华山钨矿区的多种围岩蚀变矿物及其在TM影像多光谱谱带的特征光谱分析,采用波段比值的方法对蚀变信息进行增强处理。用TM 3/TM 2波段比值增强黄铁矿和黄铜矿信息,用TM 4/TM 3和TM 5/TM 7波段比值增强绿泥石、绢云母和方解石信息;对已有的Crosta主成分分析法进行改进,将信息增强后的比值波段数据应用于Crosta法则,对西华山钨矿地区进行蚀变信息提取。经已知钨矿床(点)验证分析,证明上述方法能够有效地提取蚀变信息并识别研究区内主要矿物,提取结果可靠,可为蚀变异常提取工作提供参考。
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| 关 键 词： | TM 波段比值 主成分分析 蚀变 西华山 |
Application of principal component analysis on alteration information extraction by using TM remote sensing image |
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| LI Min-jia,LIU Jun-qi,LI Xing,ZHANG Hao-feng. Application of principal component analysis on alteration information extraction by using TM remote sensing image[J]. Journal of Natural Science of Heilongjiang University, 2012, 0(4): 546-550,555 |
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| Authors: | LI Min-jia LIU Jun-qi LI Xing ZHANG Hao-feng |
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| Affiliation: | 1(1.The Faculty of Computer,China University of Geosciences,Wuhan 430074,China;2.Three Gorges Research Center for Geo-Hazard,Ministery of Education,Wuhan 430074 China;3.The Faculty of Mathematics,China University of Geosciences,Wuhan 430074,China) |
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| Abstract: | Based on several altered rocks in Xihua mountain tungsten ore of Dayu,Jiangxi province and the rock’s spectral characteristics existing in multiple bands of TM image,the methods of band ratio were adopted to enhance the mineral alteration information.The band ratio of TM 3/TM 2 were used to enhance the chalcopyrite and pyrite information,band ratio of TM 4/TM 3 and TM 5/TM 7 was used to enhance chlorite,muscovite and calcite information;to improve the existing method of Crosta principal component analysis,the combination of the enhanced band ratio was applied to Crosta method to extract the alteration information of the Xihua mountain tungsten ore area.Validated by known tungsten ore locations,the methods mentioned above are to be proved that they can effectively extract the alteration information and distinguish the main minerals in the study area.The results are credible,so as to supply the references to the extraction of alteration information. |
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| Keywords: | TM bandratio principal component analysis alteration Xihua mountain |
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