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基于光谱匹配滤波的蚀变信息提取

DOI: 10.11834/jig.20030261

Keywords: 计算机图象处理,光谱匹配滤波,蚀变矿物,阈值,围岩蚀变

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Abstract:

从遥感图象中提取出围岩蚀变信息,一直是资源遥感应用与评价的重点与难点.在光谱一空间匹配滤波的基础上,发展了基于光谱匹配的蚀变信息提取方法.该方法在0-均值空间,以标准光谱数据库中的矿物光谱为参考光谱矢量,根据图象像元与参考光谱矢量的匹配程度,建立滤波检测器,从光谱匹配的角度进行滤波以及合理的阈值化处理,分割出蚀变信息.以新疆东天山某金矿床和西藏冈底斯某铜矿带的ETM^数据为例,从图象背景中提取出与各自矿化相关的蚀变信息,部分蚀变组合分布信息与矿床位置吻合,从而反映该方法通用性较好.

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