(a) image
(b) Ground Truth
(c) RNFA, R =0.82, P = 0.69, F = 0.75
(d) EDPF, R =0.76, P = 0.61, F = 0.68
(e) SREdge, R =0.82, P = 0.40, F = 0.54
(f) ED, R =0.88, P = 0.33, F = 0.48
(g) CannyPF, R =0.87, P = 0.29, F = 0.43