TABLE 1.

The parameters of CNN structures.

Structures	1D terahertz absorption spectrums	1D near-infrared hyperspectral spectrums	2D terahertz absorption image	2D near-infrared hyperspectral image
F	128	128	64	128
F2	64	64	32	64
R1	0.01	0.01	0.05	0.05
R2	0.01	0.01	0.05	0.05
KS1	2 × 1	2 × 1	2 × 2	2 × 2
KS2	2 × 1	2 × 1	2 × 2	2 × 2
AP	2 × 1	2 × 1	2 × 2	2 × 2
D1	256	256	512	64
D2	3	3	3	3
T	200	200	120	120

F1 and F2 mean the number of filters in the first and second convolutional layer; R1 and R2 mean the L2 regularization number of the first and second convolutional later; KS1 and KS2 mean the size of filters in the first and second convolutional layer; AP means the size of filter in the average pooling layer; D1 and D2 mean the number of neurons in the first and second fully connected layer; T means the number of training epoch.