摘要： 直线是工程图纸中出现频率最多的图元,许多更高层次的图元都是以直线段为基础而得到的,因此直线段的识别在图纸矢量化研究中占有重要地位。针对细化后的扫描图,该文将Freeman针对直线编码提出的3个约束条件应用到直线的识别之中,取得了较好的效果。通过两次直线段的合并操作较好地解决了短线段过多的问题,并且恢复了在图纸中占有重要地位的线宽信息。

关键词: 工程图纸, 直线识别, 线宽信息恢复, 直线段合并

Abstract: Straight-line segments are the most prominent constituent in most engineering drawings. And many high level constituent parts can be generated through line-segments approximation, so recognition for line-segments is the most important stage in vectorization. Three restrictions about Freeman encoding for line are applied to the recognition for straight-line segments in the thinned scanning-drawings. The overabundance of short-line segments is solved through two line-merging procedures and the line-width is also extracted.

中图分类号: 

• TP391.4