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(x1,x2)=exp(−γ‖x1-x22)
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