针对当前对工程图尤其是图纸质量较差的旧图纸的全自动矢量化还没有完全成熟可靠的算法，提出了一种新颖快速的半自动矢量化方法，即通过少量的人机交互，在点阵上进行跟踪，得到工程图纸上的矢量，同时也可将矢量所对应的光栅提取出来．既可对工程图纸进行矢量化，又可对其进行智能编辑．算法的特点是快速，准确，并具有良好的鲁棒性，对较差的蓝图也能取得理想的结果 In view of the current fully automatic vectorization of the drawings, especially the poor quality drawings of drawings, there is not a fully mature and reliable algorithm, a novel and fast semi-automatic vectorization method is proposed, that is, through a small amount of human-computer interaction, On the track, get the drawings on the vector, but also the vector corresponding to the grating extracted. It can not only vectorize engineering drawings but also edit them intelligently. The algorithm is characterized by fast, accurate, and robust, and can achieve the desired results for poor blueprints