(a) image

(b) Ground Truth

(c) RNFA, R =0.33, P = 0.16, F = 0.21

(d) EDPF, R =0.45, P = 0.12, F = 0.19

(e) SREdge, R =0.69, P = 0.08, F = 0.15

(f) ED, R =0.77, P = 0.08, F = 0.14

(g) CannyPF, R =0.69, P = 0.07, F = 0.12