(a) image

(b) Ground Truth

(c) RNFA, R =0.56, P = 0.44, F = 0.49

(d) EDPF, R =0.69, P = 0.28, F = 0.40

(e) SREdge, R =0.77, P = 0.21, F = 0.33

(f) ED, R =0.82, P = 0.16, F = 0.26

(g) CannyPF, R =0.81, P = 0.10, F = 0.17