(a) image

(b) Ground Truth

(c) RNFA, R =0.88, P = 0.92, F = 0.90

(d) EDPF, R =0.82, P = 0.92, F = 0.87

(e) SREdge, R =0.71, P = 0.90, F = 0.79

(f) ED, R =0.77, P = 0.89, F = 0.82

(g) CannyPF, R =0.80, P = 0.91, F = 0.85