Table 4 Model accuracy comparison
Rebar condition | Corrosion grade | NBC-I | NBC-II | NBC-III |
|---|---|---|---|---|
No corrosion | 1 | 100.00% | 100.00% | 100.00% |
Slight corrosion | 2 | 83.30% | 91.60% | 91.70% |
Moderate corrosion | 3 | 77.80% | 56.60% | 83.30% |
Severe corrosion | 4 | 83.30% | 91.70% | 95.60% |
Overall accuracy | 81.50% | 79.60% | 90.70% | |