利用L_2空间正交分解方法提取遥感数据中的地质信息——以九江-瑞昌地区为例

目前，国际上流行的商业化遥感处理软件信息提取算法不能满足研究多波段遥感数据中的地质弱信息的需要，如主成分变换将不同的波段数据分解为互不相关的几个因子轴，但是各因子轴的物理解释比较困难。本文采用Ｌ２空间克莱姆－斯密特正交分解方法构造正交因子轴，新因子轴的建立基于矢量表示的投影定理。利用该种算法开发的程序处理多波段遥感数据，彩色合成的图象色彩平稳，图象中同类地物细节得到显示，物理意义明晰，采用该方法处理九江－瑞昌金铜矿带取得了较好的结果。

THE USE OF L2 SPATIAL ORTHOGONAL SEPARATION METHOD TO EXTRACT GEOLOGICAL FEATURES FROM MULTI-BAND TM DATA

Currently, the algorithm of the commercial image processing software cannot meet the needs for extracting weak geological features from multi band TM data. The principal component calculation provided can process multi band data. However, physically, some difficulties remain for explaining colorful resultant component composition. In order to derive more potential information from multi band raw data of remote sensing, the L 2 spacial orthogonal separation method is used to extract geological features from multi band TM data. The Gram Schmit transform software is developed to achieve the orthogonal axes to expose the information on rocks and structures. As a result, more detailed rock information is achieved. It is proved that the method can also be used in other places in China.