Fig. 3From: Optimum design of chamfer masks using symmetric mean absolute percentage errorSymmetric mean absolute percentage error (left column) and edge geometry (right column) generated by 3Ă—3 chamfer mask. a Euclidean weights, a=1 and \(b=\sqrt {2}\). b Euclidean weights, a=1, \(b=\sqrt {2}\), and r=1c. Our weights, a=0.9612 and b=1.3593d. Our weights, a=0.9612, b=1.3593, and r=1Back to article page