The paper describes the VEDI (Vectorization of Engineering Drawing Images) system developed for automatic recognition of main engineering drawing (ED) entities. The main principles of ED interpretation are introduced and the algorithms to recognize main ED entities are briefly described. In conclusion, some technical parameters and experimental results of the system performance are given.

The paper introduces the main principles of automatic interpretation of engineering drawing images. The technology of ED interpretation is proposed based on the introduced principles. The algorithms for automatic recognition of the main ED entities: line types, circular arcs, blocks, crosshatched areas and dimensions are proposed. They have been verified experimentally in the whole ED interpretation technology and show good results.

The authors describe a system for automatic interpretation of map-drawings. To vectorize large-size 2-D line-drawing images, an effective pipeline-oriented scheme and special techniques have been developed on the basis of economic image representation. This allows processing large-size binary images on a personal computer and obtaining satisfactory time characteristics. This approach can be easily realized in a pipelined architecture using a simple transputer chain. The document object recognition techniques are described.>