Fig. 2From: Effective elliptic arc selection from connected edge points a An ellipse fitted to a point sequence which includes non-elliptic arcs. A black line is an input point sequence. b Fitting residual graph. The horizontal axis shows the index of the points, which starts from the blue point to the red point shown in (a). The vertical axis shows the signed fitting residual whose sign is computed by the left-hand side of Eq. (4)Back to article page