40 3. HOW SOCIAL CONTEXT HELPS
f .c
i
; c
j
/ D
.1/
b
D
JS
.p
ik
jjp
jk
/ C 1
;
b b D 0 c
i
c
j
b D 1
Propagating Credibility Values
T D fo.c
1
/; o.c
2
/; :::; o.c
n
/g
o.c
i
/ c
i
W 2 R
nn
W
ij
D f .c
i
; c
j
/
viewpoint c
i
c
j
Q.T/ D
n
X
i;j D1
jW
ij
j
0
B
@
o.c
i
/
p
N
D
ii
e
ij
o.c
j
/
q
N
D
jj
1
C
A
2
C .1 /kT T
0
k
2
;
N
D
N
D
ii
D
P
k
jW
ik
j e
ij
D 1 W
ij
0 e
ij
D 0
G
C
T
D
T
Q.T/:
T
T.t/ D HT.t 1/ C .1 T
0
/ H D
N
D
1=2
W
N
D
1=2
3.3 NETWORK-BASED DETECTION