| Methods | Stage | |||
| Normal | Mild | Moderate | Severe | |
| Liu et al. [1] | 100% | 88.9% | 88.2% | 76.9% |
| Zhao et al. [3] | 100% | 98.75% | 93.75% | 83.63% |
| Liu et al. [4] | 100% | 94.44% | 93.75% | 92.31% |
| Fu et al. | 100% | 98.75% | 93.75% | 92.31% |
| The proposed | 100% | 100% | 93.75% | 92.31% |