利用 TM 图像波段比值、热红外图像复合处理识别岩石类型

RECOGNITION OF ROCK TYPES USING BAND RATIO AND THERMAL INFRARED BAND OF LANDSAT TM IMAGES

ＴＭ数据以其多光谱段信息为地学领域的应用提供了更多选择和可挖掘潜力。近年来，作者利用ＴＭ比值处理图像及ＴＭ６波段（热红外波段）所包含的地质构造信息、地质体辐射信息和计算机增强方法的研究，填制岩性和识别没有地貌标志的热效应信息指导找矿，取得了比较好的效果。

Landsat TM 1,2,3,4,5,and 7 measure the reflected energy of rocks. TM6, the thermal infrared band, measures the emitted energy of rocks. The combinating use of these properties to distinguish rock types through TM image processing and infromation extracting has been tested by the authors in Xinjiang and Hebei. There is an obvious difference between the gold bearing rocks and other rock types in color in the composed image of multiband ratio and thermal infrared image in the Savayaerton area, Xinjiang. The method had been used in the other regions of Hebei and Xijiang and achieved remarkable results.