波谱向量q-τ图解法在求TM图像最佳波段组合中的应用

TENTATIVE APPLICATION OF SPECTRAL VECTOR q τ GRAPH FOR THE SOLUTION OF OPTIUM SPECTRAL COMBINATION OF TM IMAGE FOR THE ALTERATIVE BELT

选择一个合理的地质剖面，通过蚀变带与逐个岩性特征波谱向量的比较，可以求出提取蚀变带信息的ＴＭ图像最佳波段组合。这种方法要通过蚀变带与其它岩性的波谱向量相似系数和向量模量差所构成的ｑ－τ图解来实现，将波谱向量ｑ－τ图解应用于滇西某金矿区。

Each pixel of a false color TM combination image is composited by three gray scals of three simple spectral images in order,which are transported into red,yellow,blue lights separately.Three gray scals in order structure a three dimensional vector called spectral vector.By choosing a rational geological section,comparing the characteristic spectral vector between alteration’s and other lithologe’s,we can obtain the best spectral composition of TM image for the collection of alteration.This method is called lithologic characteric spectral vector of geological section comparement.Its application in a gold mineralized eara in the westen of Yunnan,proves the method is effectively on large scale mineral deposits prespection.