工程图纸中虚线的提取算法

本文提出了图纸转换系统中虚线提取的一个有效算法，算法由小短线的提取，种子短线的确认，小短线的吸收，粘连段的处理和段数的确定五个部分组成，本文详细介绍了这五个组成部分的实现过程，最后给出一个实例，结果证明该算法能有效处理图纸中大量存在的大部分虚线型。

AN EXTRACTING ALGORITHM FOR DASHED LINES IN ENGINEERING DRAWINGS

This paper presents an efficient algorithm of extracting dashed lines on engineering drawing conversion system. The algorithm contains five parts: extracting small segments, deciding seeds, recognizing small segments, treating sting segments and splitting dashed line. The processings of these five parts are discussed in detail. In the end of this paper,an experimental example is given,and it proves that the presented algorithm can efficiently extract the greater part of dashed lines which exist on engineering drawings.