Table 18.

Symbol Table

SN	Symbol	Description of Symbol
1	pi	Probability of pixel intensity
2	B	Bispectrum value
3	μControl	Mean feature strength for control class
4	μCOVID	Mean feature strength of COVID class
5	Se	Sensitivity
6	Sp	Specificity
7	F	Fourier transform
8	E	Expectation operator
9	DL	Deep Learning
10	TL	Transfer learning
11	k -NN	k-Nearest neighbor
12	ANN	Artificial Neural Network
13	DT	Decision tree
14	RF	Random Forest
15	K2	2-fold cross-validation
16	K4	4-fold cross-validation
17	K5	5-fold cross-validation
18	K10	10-fold cross-validation