遥感图像专题信息提取新方法─—定向变换和逻辑取与法研究

The New Methods for Extracting Thematic Information─ The Studies on the Methods of Directional Transformation and Logical Intersection

本文利用ＴＭ波段比值开展了专题信息的计算机自动提取工作，提出了两种新方法─—定向变换法和逻辑取与法。在南方亚热带植被覆盖的火山岩区进行了试验。结果表明，所提出的方法能消除植被和其他地物的干扰，有效地提取出与金、银等多金属有关的矿化蚀变信息，效果良好。同时，在南方红盆区油气显示信息的提取和直接寻找油气藏方面，用波段比值逻辑取与法也取得良好效果。新方法是实用的，有广阔的应用前景。

Computer processing for extracting thematic information has been deve- loped by using different band ratio of TM data. In the course of the researchesauthors advanced two new methods,Directional Transformation method and LogicalIntersection method. In southern areas of subtropical volcanic rock covered with vegetation such asXin Chang,Ba Mao and Xi Kou area,the satisfied effects have been obtained.Thenew methods can eliminate the interfering information of vegetation and other ob-jects,and the hydrothermal alteration information can be extracted effectively.Itsimportance is to explore Au,Ag and multiple metalliferous ore. In the aspect of extracting information about oil gas show and detecting oilfield with the information directly in area of southern red basin,a good resulthas been achieved too by using the new method of Logical Intersection. It shows that the new methods posed in this paper is practical and have wideapplied prospects.