(a) image

(b) Ground Truth

(c) RNFA, R =0.60, P = 0.70, F = 0.65

(d) EDPF, R =0.72, P = 0.39, F = 0.50

(e) SREdge, R =0.83, P = 0.31, F = 0.45

(f) ED, R =0.86, P = 0.25, F = 0.39

(g) CannyPF, R =0.86, P = 0.19, F = 0.32