Fig. 8

Symmetric mean absolute percentage error and edge geometries generated by a 7×7 chamfer kernel. a Euclidean weights, a=1, \(b=\sqrt {2}\), \(c=\sqrt {5}\), \(d=\sqrt {10}\), and \(e=\sqrt {13}\). b Euclidean weights, a=0.9935, \(b=\sqrt {2}\), \(c=\sqrt {5}\), d=3.1417, and e=3.5830. c Our weights, a=0.9935, \(b=\sqrt {2}\), \(c=\sqrt {(5)}\), d=3.1417, and e=3.5830. d Our weights, a=0.9935, \(b=\sqrt {2}\), \(c=\sqrt {5}\), d=3.1417, and e=3.5830