Arc segmentation by stepwise recovery of vectorized pieces
Dov Dori, Liu Wenyin · 2002
Accurate arc segmentation is essential for high-level engineering drawing understanding and is very difficult due to noise, clutter, tangency, and intersections with other geometry objects. We present an application of a generic methodology for recognition of multicomponent objects in engineering drawings to the segmentation of circular arcs. The underlying mechanism is a sequential stepwise recovery of components that are segmented as wire fragments during the vectorization process and meet the continuity conditions of the same circular arc. Proper threshold selection and consistent checking of co-circularity of the assumed arc pieces result in accurate circular arcs. Experimental results are presented and discussed.