基于形状分析的点状地图符号识别  

Recognition of Point-Shaped Map Symbol Based on Shape Analysis

作　　者：黄文骞[1] 

机构地区：[1]海军大连舰艇学院

出　　处：《测绘工程》1996年第4期14-21,共8页Engineering of Surveying and Mapping

摘　　要：着重讨论了基于形状分析的点状地图符号识别。其主要内容包括点状地图符号的计算机描述,点状地图符号识别系统的结构,点状地图符号识别实验与分析等。文中利用带搜索控制准则的新边界跟踪算法,改进了传统的边界跟踪算法,提出了用傅立叶系数描述点状地图符号的形状特征,并对计算公式作了进一步改进,介绍如何由傅立叶系数提取形状特征不变量,实现了对点状地图符号的自动识别。Recognition of point-shaped map symbol based on shape analysis is expounded in this paper. The computer description) structure of recognition system, experiment and analysis of recognition of point-shaped map symbol etc. are discussed as principal research contents. A traditional border tracking algorithm is improved using a new method with a criterion to control search. And describing shape feature of point-shaped map symbol by using fourier coefficient is proposed. The calculation formula is further ameliorated also. How to extract shape feature invariant from fourier coefficient to realize recognition of point-shaped map symbol automatically is introduced.

关 键 词：地图符号 形状分析 自动识别 

分 类 号：P283.1[天文地球—地图制图学与地理信息工程]