Table 9.
Comparison of different preprocessing methods in Experiment 2: COVID-19, SARS, and MERS pneumonia.
| Method | Performance Metrics (%) |
||||
|---|---|---|---|---|---|
| Sensitivity (Recall) | Precision (PPV) | F1-score | Accuracy | Average Rank | |
| No Preprocessing | 89.77 (5) | 91.60 (4) | 90.62 (5) | 92.15 (5) | 4.75 |
| Image Adjustment | 97.57 (3) | 96.63 (2) | 97.09 (3) | 97.57 (2) | 2.5 |
| Histogram Matching | 94.78 (4) | 91.19 (5) | 92.80 (4) | 93.72 (4) | 4.25 |
| Histogram Equalization | 97.94 (2) | 96.47 (3) | 97.18 (2) | 97.43 (3) | 2.5 |
| CLAHE | 98.89 (1) | 98.56 (1) | 98.73 (1) | 98.86 (1) | 1.0 |
*Bold numbers indicate the best performance.