高光谱数据处理及其在广西苗儿山地区的地质应用研究

本文以广西苗儿山地区机载成像细分红外高光谱数据为例，探讨了高光谱数据的特点及其处理方法。编制了一系列进行数据预处理的软件，进行了条带去除、波段间配准、航向压缩、镜向变换、辐射校正、正切校正、相对反射率转换等预处理，获得了高质量图像。在ＥＮＶＩ软件基础上建立了研究区野外实测光谱曲线库及分类子库，并对各子库进行了系统研究。同时，提出了正确的配准方案，对图像进行了精校正和镶嵌，取得了满意的镶嵌图像；在纯净像元提取、混合像元分解、匹配滤波、光谱特征拟合等方面进行了探索。最后，探讨了高光谱数据的地质应用潜力，尤其在硅化带识别方面取得了成功的效果，发现了一系列新的含铀硅化断裂带；预测了３片成矿有利地段，经验证，在其中两片地区找到了明显的铀偏高和矿化显示。

HYPERSPECTRAL DATA PROCESSING AND RESEARCH ON GEOLOGICAL APPLICATION IN MIAOERSHAN DISTRICT,GUANGXI PROVINCE

Taking Miaoershan district in Guangxi province of South China as an example area,the chara cteristics and the processing techniques of the airborne hyperspectral data are discussed in detail. A series of programs for strip removing, registration between bands, tangent correction illumination calibration and relative reflectance calibration has been develo ped. On the basis of software ENVI(the Environment for Visualizing Images),a field spectral library in the study area has been set up and a method for geometric corrections with satisfactory mosaic images has been developed. Great achievements in some aspects such as pure pixel extraction, spectral unmixing, matched filtering and spectral feature fitting have been made. Based on the processed image interpretation, silicified zones and other alteration zones are successfully delineated and specific uranium prospecting areas are proposed.