Table 2.

Optimum hyperparameters chosen through 5-fold cross validation for the elastic net eight node and one hidden layer perceptron classifier across the four datasets (Constant_1, Constant_2, CEU_1, and CEU_2) and three feature sets (wavelet, curvelet, and joint wavelet-curvelet [W-C])

Hyperparameters	Constant_1			Constant_2			CEU_1			CEU_2
	Wavelet	Curvelet	W+C	Wavelet	Curvelet	W+C	Wavelet	Curvelet	W+C	Wavelet	Curvelet	W+C
Wavelet level	1	N/A	1	1	N/A	1	1	N/A	1	1	N/A	1
γ	0.3	1	0.9	1	0.1	0.9	1	0.9	0.1	1	0.9	0.1
λ	${10}^{-5}$	${10}^{-5}$	${10}^{-5}$	${10}^{-6}$	${10}^{-6}$	${10}^{-5}$	${10}^{-5}$	${10}^{-5}$	${10}^{-5}$	${10}^{-5}$	${10}^{-5}$	${10}^{-6}$