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LBP labels is used as a texture descriptor. In Figure 3 the computation of the
original LBP is shown. The resulting binary numbers encode local primitives
such as curved edges, spots, flat areas etc. as shown in Figure 4.
Fig. 3 Example of LBP computation on a 3×3 neighborhood region
Fig. 4 Local primitives encoded by LBP
Fig. 5 Different values of
R
and
P
for LBP
Due to the small neighborhood, the original LBP cannot capture domi-
nant features with large scale structures. The operator was later extended
to use neighborhood of different sizes [14]. Circular sampling and bilinear
interpolation allow any value for radius and number of pixels in the neigh-
borhood. Given a pixel at a certain location, the resulting LBP operator can
be expressed in decimal form as
P
−
1
P
LBP
P,R
=
s
(
g
p
− g
c
)2
(2)
p
=0
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