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红粘土型金矿是黔西南的一个重要的金矿类型,我们以往的研究实践表明:Aleks Kalinowski等[1]研制的红粘土型金矿ASTER波段比值4/5不适合黔西南红粘土的信息提取,因此,需要研究适合该地区的ASTER波段比值。ASTER波段比值组合2/1、4/3和(5+7)/6彩色合成后被成功地应用到研究区的红粘土提取中。比值的选择是建立在对矿区红粘土光谱曲线特征的分析和ASTER图像预处理的基础上,该比值组合能够有效提取出ASTER图像上的矿区红粘土信息,并可以扩展应用到周边地区,寻找到更多含金红粘土的分布区,这充分显示了ASTER波段比值彩色合成技术在红粘土提取中的作用。 更多还原

【Abstract】 Red clay-type gold deposit is an important gold type in southwest Guizhou.Our research in the past showed that the ASTER index of band ratio 4/5 put forward by Aleks Kalinowski[1] can not be used for extraction of red clay in southwest Guizhou,so that,a study of ASTER index for red clay extraction in this area is necessary.The combination of ASTER band-ratio images 2/1,4/3 and(5+7)/6 in RGB were applied successfully for the red clay extraction in study area.The selection of band ratio was based ... 更多还原