ETM图像数据中矿化蚀变信息的提取——以西昆仑塔什库尔干地区为例  

INFORMATION EXTRACTION OF MINERALI ZING ALTERATION FROM ETM SPACE IMAGE:Taking Taxkorgan Area of West Kunlun Mountain as an Example

作　　者：王晓鹏[1] 谢志清[1] 伍跃中[1] 

机构地区：[1]中煤航测遥感局遥感应用研究院,陕西西安710054

出　　处：《地质与资源》2002年第2期119-122,共4页Geology and Resources

基　　金：中国地质调查局技术方法类项目"西昆仑地区遥感找矿异常提取方法研究"项目(编号200120140115)部分成果.

摘　　要：以ETM图像数据为信息源,在西昆仑塔什库尔干地区进行了遥感找矿异常的提取.针对区内发育的不同蚀变类型,先用特征波段比值、主成分分析、彩色空间变换等方法进行增强处理,然后利用阀值分割,并将不同蚀变类型的分割图像进行中值滤波,对经过中值滤波后的图像进行赋色、叠加,得到综合遥感矿化蚀变异常,并对圈定的异常效果进行了分析评价.Using ETM space image data as the info rmation source,some information is extracted on the remote sensing mineralizing abnormal in Taxkorgan area of West Kunlun mountain.Against different mineralizing alteratio n types in the studied area,some methods,such as b and ratio,principal component analysis,Munsell color transformation etc.,are applied to enhance the alteration in formation on the image.Then the thre shold segmentation method is used to get the mineralizing alteration abnormal.After that,the images of different a lteration types are treated by Media n convolution,given different color,and superimp osed together.And a synthesis remote sensing mineralizing alteration a bnormal is got.Finally,the delineated abnorm al effect is appraised and analysed.

关 键 词：塔什库尔干地区 ETM图像 矿化蚀变异常 信息提取 遥感勘探 特征波段比值 主成分分析 

分 类 号：P627[天文地球—地质矿产勘探]