An Example-Driven Symbol Recognition Approach Based on Key Features in Engineering Drawings
In this paper, we present an example-driven symbol recog- nition algorithm based on its key features in CAD engineer- ing drawings. Firstly, we extend the existing relation rep- resentation by involving new basic elements and redefining the relation attributes between them. The structure of symbol objects can be represented by this mechanism. When user provides an example of a specific symbol, the input symbol is analyzed and its features are extracted automatically. Based on the relation representation the constrained tree with key feature priority can be established for this type of symbol. By this means, the symbol library can be built and ex- panded automatically in order to handle variety engineering drawings. In the next stage of the recognition processes, we first locate the key feature nodes in drawings, and then find other elements around which satisfy the topology structure of constrained tree. If all the elements and constrains in the tree are found, the symbol object will be recognized. Because of the accurate position, unnecessary matching calculations are greatly reduced. Experimental results validate that our approach is effective.
国际会议
2011国际计算机辅助设计与图形学学术会议(CAD/Graphics 2011)
济南
英文
1-7
2011-09-15（万方平台首次上网日期，不代表论文的发表时间）