摘要
本文从物理光学的基本数学模型出发,将卫星图像分解成直接光照区和阴影区两个分模型,运用朗伯面的光照原理,说明经大气散射校正后的比值图像与照度、太阳入射角和漫射光无关。这种图像处理技术可加大地物光谱反差、消除阴影效应、有效地区分同一属性的地质体并可判泽可能与矿化有关的色形图像异常。文章结合作者近年来对遥感构造研究的部分成果,表明经大气散射校正后的比值图像,对华南与钨锡矿化有关的隐伏或半隐伏小岩体的蚀变带、华北金伯利岩及与其共生的碱性岩脉的预测有着广泛的应用前景。
The ratio processing is one of the methods exhancing the landsat images. Bymeans of an analysis of the ratio method with the mathematical concept and themathematical model, the authors consider that the ratio image is not related tothe illuminance (I), sun elevation (E), normal line verctor of the ground (Q) anddiffuse light (D), but only bound up with the ground reflectance. Therefore, it ispossible to apply the ratio image in distinguishing the characteristics of a geolo-gical body on the ground. The authors think that it is necessary to make an atmo-spheric correction before ratio processing. The paper presents the ratio effectiveness in finding mineral image abnor-malities with some examples which have been worked out by the authors.
出处
《地质论评》
CAS
CSCD
北大核心
1992年第1期82-89,共8页
Geological Review