工程图信息系统──EDIS

Engineering Drafting Information System

介绍了ＥＤＩＳ（ＥｎｇｉｎｅｅｒｉｎｇＤｒａｆｔｉｎｇＩｎｆｏｒｍａｔｉｏｎＳｙｓｔｅｍ）系统的多层次处理工程图纸的方法以及在图形识别方面的新进展。ＥＤＩＳ通过对图纸数据的分层，使系统在处理图纸信息中能灵活结合自动处理、人工交互和智能辅助的方式，提高了处理的效率和实用性。文章还在图形识别的研究中提出了“轮廓匹配法”、推广的拓扑数据结构和图形矢量的鲁棒识别方法。

Industry has always been using drawings and maps as the primary mcans of communicating design andmanufacturing information.If the drawings are to be medified extensively by mcans of CAD tool,amethed of converting the scanned image into a suitable format must be available, To develop the effectivemethod,four basic data type of drawings have been defined in this papor,which take the advantage ofusing fiexible operations efficiently.Moreover,“contour line matching”,“spceific topological structurecxpression”,and “rubust vector extraction method”have been intreduced within the process ofVectorisation