(a) image

(b) Ground Truth

(c) RNFA, R =0.79, P = 0.61, F = 0.69

(d) EDPF, R =0.80, P = 0.37, F = 0.50

(e) SREdge, R =0.86, P = 0.31, F = 0.45

(f) ED, R =0.91, P = 0.21, F = 0.34

(g) CannyPF, R =0.97, P = 0.15, F = 0.26