Engineering Drawing Processing and Vectorization System

Abstract This paper presents the methods for preprocessing and vectorizing scan digitized images of engineering drawings for transferring the resulting data to commercially available CAD/CAM systems. The preprocessing steps include noise removal, void filling, image segmentation, line thinning, and contour extraction. Algorithms for raster-to-vector conversion capable of recognizing and fitting straight line segments, circles, arcs, and conic sections are presented along with results obtained from images of machine drawings.

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