(
a) Raw image; (
b) Bilateral smoothing results; (
c) Anisotropic smoothing results; (
d) Gray transform of b; (
e) Gray transform of c; (
f) ResNet_SegNet result of a; (
g) VGG_Unet result of a; (
h) Intersection of f with c; (
i)
![](/pmc/articles/instance/8199125/equ/mm331)
kernel of h. (
j)
![](/pmc/articles/instance/8199125/equ/mm332)
kernel of h. (
k) Otsu result of h; (
l) Canny result of h; (
m) ED result of h; (
n) ISEF result of h; (
o) Binary Laplace of h; (
p) Zero-Crosing of o; (
q) Shen-Castan of h; (
r) Expanded Canny from L1; (
s) Expanded ED from L1; (
t) Expanded Shen-Castan from L1.