표 2. | Table 2. 커널 함수의 종류 | Type of SVM kernel functions.
Kernel
Kernel function expression
Linear
K
=
x
1
,
x
2
=
x
1
T
x
2
RBF
K
(
x
1
,
x
2
)=exp(−γ‖
x
1
-
x
2
‖
2
)
Sigmoid
K
x
1
,
x
2
=
tanh
γ
x
1
T
x
2
+
θ
Polynomial
K
x
1
,
x
2
=
x
1
T
x
2
+
C
d
,
C
>
0