A new approach for the location of circular arcs in scanned drawings is proposed in this paper. It includes two main procedures: raster to block procedure and circular arc recognition procedure. In the raster to block procedure

the drawing image is split up into primary components (blocks) which are composed of connected black pixels. Based on the blocks

several candidate circle (arc) links are generated and the circular arcs' centers

radius

starting points and end points are estimated in the circular arc recognition procedure.