基于拓扑结构的工程图纸识别方法  

The Research on Engineering Drawing Recognition Based on Topology

作　　者：宋晓宇[1] 李玉冲[1] 刘继飞[1] 

机构地区：[1]沈阳建筑大学信息与控制工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2011年第4期776-781,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省教育厅高等学校科学研究项目(L2010450)

摘　　要：目的构建工程图纸中常用图形对象的知识库,在后续图形对象识别过程中,利用知识库中存储的图形对象的特征信息,标记其他待识别工程图纸中相似度较高的图形对象.方法将矢量化处理后得到的基本图元之间的拓扑关系和几何约束信息存储在图的结构中,作为这类图形对象的知识表征.在识别工程图纸时,利用图结构中存储的图形对象知识表征进行比较与识别.结果对工程图纸中常用的六个图形对象在识别时间和识别率两个方面进行了测试,随着组成待识别图形对象"基本图元"数量的增加,图形对象的识别时间基本趋于线性增长并且识别率都可达到97%以上.结论基于拓扑结构的工程图纸识别方法在前期图元矢量化的基础上能够准确高效的进行二维图形对象的识别.The paper aims to construct the knowledge base for graphic objects which often used in engineering drawing,and to use these feature information of graphic objects to mark other graphic objects which have higher similarity later in the process of graphic object recognition.The key idea of this method is that it stores the topological relations and geometric constraint information of the basic primitives as the knowledge representation of graphic objects in the graph structure after the vectorization.In the process of recognizing the engineering drawings,it uses the knowledge representation of graphic objects to compare and recognize them.Results of the recognition time and the recognition rate of six common graphic objects show that with the increase in the number of graphic objects the recognition time becomes linear growth and recognition rate will be more than 97%.Experiments have shown that this method is accurate and efficient in recognizing two-dimensional graphic objects after the vectorization.

关 键 词：图形对象 知识库 特征信息 矢量化 拓扑关系 知识表征 

分 类 号：TP391.412[自动化与计算机技术—计算机应用技术]