(a) image

(b) Ground Truth

(c) RNFA, R =0.79, P = 0.43, F = 0.56

(d) EDPF, R =0.74, P = 0.37, F = 0.50

(e) SREdge, R =0.88, P = 0.29, F = 0.43

(f) ED, R =0.90, P = 0.24, F = 0.38

(g) CannyPF, R =0.95, P = 0.24, F = 0.39