Table 7.

Number of images and validation techniques used by the various state-of-the-art methods.

Method	Number of images	Validation
Multi-CNN	453 COVID-19 vs. 497 non-COVID (Dataset-1)	10-fold CV
Multi-CNN	71 COVID-19 vs. 7 non-COVID (Dataset-2)	10-fold CV
[17]	231 COVID-19 vs. 500 no-findings	10-fold CV
[15]	142 COVID-19 vs. 142 normal	70% data for training and 30% testing
[12]	50 COVID-19 vs. 50 normal	5-fold CV
[13]	250 COVID-19 vs. 250 non-COVID	10-fold CV
[13]	Training: 250 COVID-19 vs. 250 non-COVID	Testing: 74 COVID-19 vs. 36 non-COVID
[44]	100 COVID-19 vs. 1431 non-COVID	2-fold CV
[14]	25 COVID-19 vs. 25 non-COVID	80% data for training and 20% testing

Number of images and validation techniques used by the proposed method are indicated in bold.