抄録
We propose a new
evalua
tion
method
of rock condition
using
new
fo
ur directional
Sobel
filters to
detect
cracks
f
o
r
a tunnel face image
captured by a widespread camera.
The detected cracks show the property of the rock, and we think that the
amount of the cracks are
one of some
objective index
es
of
rock quality
.
W
e confi
rmed the usefulness of rock crack for
sequent
real
tunnel face image.
