Restoration of CAD database and geometric feature recognition

Research output: Contribution to conferencePaperpeer-review


The overall goals of this research project are to develop a computer assisted system which automatically recognize the contents of an existing mechanical drawing and to develop a procedure for manufacturing process, i.e. an intelligent process planning system. There are several major parts in the system; scan the drawing, extract lines, arcs and circles; recreate the drawing, recognize design features; and create process procedures. The first major part of system called RENDER have been successfully complemented in UNIX environment. RENDER reads the raster file and creates vectorized file consisting of lines, arcs and circles. This article describes the development of the second part of the system. An algorithm has been developed to reconstruct the engineering drawing with exact number of lines, arcs, and their order. Based on this information, two dimensional geometric features are constructed and recognized. A library of geometric features have been developed for comparison purpose. Several example problems are presented to demonstrated the viability and accuracy of the system.

Original languageEnglish (US)
Number of pages8
StatePublished - 1992
Event4th International Conference on Design Theory and Methodology - Scottsdale, AZ, USA
Duration: Sep 13 1992Sep 16 1992


Other4th International Conference on Design Theory and Methodology
CityScottsdale, AZ, USA

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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