(a) image

(b) Ground Truth

(c) RNFA, R =0.75, P = 0.42, F = 0.54

(d) EDPF, R =0.82, P = 0.35, F = 0.49

(e) SREdge, R =0.78, P = 0.38, F = 0.51

(f) ED, R =0.76, P = 0.34, F = 0.48

(g) CannyPF, R =0.82, P = 0.31, F = 0.45