【摘要】 本文引入了一种梯形邻接图的图形表示方法来表达工程图纸中的线图形及其几何拓扑关系，并在此基础上提出了一种基于单次逐行扫描、梯形轮廓匹配、从轮廓提取矢量的工程图纸矢量化算法。这种算法能有效地提取出与原图保持较好一致性的图形矢量，具有处理速度快、内存需求小、矢量化效果好、特别适合丁大幅面图纸的矢量化等特点。更多还原

【Abstract】 By introducing a Trapezoid Adjancency Graph (TAG) to represent the line graphics and their geometry relationships in engineering drawings,a robust vectorization algorithm based on the idea of line scan and Black Trapezoid Block(TB)matching is presented. It extacts TBs directly from images with only one scan by adopting a new control strategy,and then obtains pophio vectors matching the original drawing closely Expriments indicate that this algorithm has seurel advantages such as good quality,high speed,low requirement memory,and is specially suitable for vectorizatlon of large drawings.更多还原