Boundary segmentation and parameter estimation for industrial inspection

The paper addresses a typical industrial inspection problem, namely the online estimation of centres and radii of circular arcs on a digitised boundary. The problem is identified as two subproblems: (a) accurate location of knot points where different primitives join, and (b) accurate estimation of parameters related to each segment. The first problem is solved by developing a powerful tool for identifying segment types, and the second problem is solved by improving an existing algorithm which estimates the centre and radius for an individual arc.