Information extraction from meteorological facsimile maps
气象传真图信息提取

In this paper we describe the use of image processing methods to extract important information from meteorological 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 segments on vorticity lines,and we combine these methods to extract triangles on frontal lines. Experiments show that these methods work effectively.