(a) image

(b) Ground Truth

(c) RNFA, R =0.70, P = 0.49, F = 0.58

(d) EDPF, R =0.77, P = 0.35, F = 0.48

(e) SREdge, R =0.85, P = 0.29, F = 0.43

(f) ED, R =0.87, P = 0.23, F = 0.36

(g) CannyPF, R =0.87, P = 0.16, F = 0.28