(a) image

(b) Ground Truth

(c) RNFA, R =0.88, P = 0.67, F = 0.76

(d) EDPF, R =0.87, P = 0.58, F = 0.70

(e) SREdge, R =0.86, P = 0.38, F = 0.53

(f) ED, R =0.93, P = 0.33, F = 0.48

(g) CannyPF, R =0.92, P = 0.26, F = 0.41