(a) image

(b) Ground Truth

(c) RNFA, R =0.90, P = 0.87, F = 0.89

(d) EDPF, R =0.89, P = 0.86, F = 0.88

(e) SREdge, R =0.74, P = 0.94, F = 0.83

(f) ED, R =0.82, P = 0.86, F = 0.84

(g) CannyPF, R =0.90, P = 0.66, F = 0.76