8/14/2019 118 - An evaluation of the grid geometry for human action recognition.pdf
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a,c
a,c
b,c
a,c
a
b
c
8/14/2019 118 - An evaluation of the grid geometry for human action recognition.pdf
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BBt
(WH)
Ft
BBt
BBt1
BBt N
BBt
Ft BBt
N
N
n
n
[0 2]
z
w(z) =w(z;K,L)
K
L
KL
w1 w2
w1
L = 4
8/14/2019 118 - An evaluation of the grid geometry for human action recognition.pdf
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w1
w2
w1(z) = 1 w1(z)w2(z) = 1 w2(z)
(x, y)
BBt
m(vx, vy) = (vx, vy) (x, y)
R(x, y)
i
Ri(x, y), i 1, 2
HR(x,y)[n()] HR(x,y)[n())] +
+ m(vx, vy) w1(x) w2(y)
HR1(x,y)[n())] HR1(x,y)[n())] ++ m(vx, vy) w
1(x) w2(y)
HR2(x,y)[n())] HR2(x,y)[n())] ++ m(vx, vy) w1(x) w
2(y)
n(vx, vy)
x y
p (1, 1)
R(x, y)
wx wy
x (1, 0)
R1(x, y)
wx wy
y
(0, 1)
R2(x, y) wx w
y
BBt
N
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H1
h , ...,
HN
h
h =N
i=1
nj=1
Hi[j]
N = m n
m
n
w1= wx = w(x;W,m)w2= wy = w(y;H, n) w
1= w
x = 1 wx w2= w
y = 1wy W H
BB
N = s r
s
r
R
w1 = w = w(;R, r)w2= w = w(; 2, s) w
1= w
= 1w w2 = w
= w
m = 4 n = 4 N = 16
r = 2 s = 8 N = 16
8/14/2019 118 - An evaluation of the grid geometry for human action recognition.pdf
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4 4 8 2 2 8 2 12
12 2
8 3
3 8
n
BBt WH 60 60
5 5
2 12
12 2
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4 4 8 2 2 8 12 2 2 12 3 8 8 3
122
212
2 12
12 2
2 12 12 2
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2 12
12 2
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