气象传真图信息提取

Information extraction from meteorological facsimile maps

该文采用图像处理方法提取气象传真图中等位势高度线、等位势涡度线、锋线等信息,以便于分析及与其他信息的融合。提出一种新的基于多区域特征点(块)配对的交叉线识别方法提取交叉的等位势高度线,提出新的向量积算法识别等位势涡度线中的虚线段,综合多种三角形提取方法提取锋线上的三角形。实验结果表明,这些方法能够有效地识别出气象传真图中等位势高度线、等位势涡度线、锋线。

In this paper we describe the use of image processing methods to extract important information from meteorologi cal facsimile maps for analysis and integration with other information. We propose a method based on matching feature points to judge intersecting lines. Furthermore, we propose a method based on vector products to recognize dotted line seg ments on vortieity lines, and we combine these methods to extract triangles on frontal lines. Experiments show that these methods work effectively.