(a) image

(b) Ground Truth

(c) RNFA, R =0.60, P = 0.44, F = 0.51

(d) EDPF, R =0.62, P = 0.38, F = 0.47

(e) SREdge, R =0.90, P = 0.13, F = 0.22

(f) ED, R =0.90, P = 0.11, F = 0.19

(g) CannyPF, R =0.91, P = 0.11, F = 0.19