Algorithm 1.

Inputs: $\mathit{\xi }=\left\{{\mathit{\xi }}_{\mathit{k}}|{\mathit{\xi }}_{\mathit{k}}\in {\mathbb{R}}^{\mathit{d}},\mathit{k}=1,2,3,\dots ,\mathit{N}\right\}$  $\widehat{\mathit{y}}=1,\widehat{\mathit{y}}=-1$Output: Prediction LabelInitialization: -Regularization Parameter -Trade-off value $\mathbb{C}$ Training: -Compute kernel matrix ϱ and output weight matrix w by Eq.(20) -Compute network output $\widehat{\mathit{O}}$ by Eq. (21) -Compute threshold parameter t by Eq. (22) Testing: For kth input testing image (ξ k), output is calculated by ${\widehat{\mathit{O}}}_{\mathit{k}}$ by Eq. (23) Predict ξ k as given labels ○COVID19- Pneumonia ○Normal