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Optimized classification result between various classes having identical tongue shape.
| Tongue shape | Class comparison | Optimal feature(s) | Average accuracy |
|---|---|---|---|
| Circle or square | Healthy versus EG | 1, 7 | 88.65% |
| Obtuse triangle | DM versus. CHD | 1, 7, 4, 11, 13, 2 | 76.23% |
| Acute triangle | NR versus CG | 2 | 70.00% |
| Rectangle | GV versus NS | 9, 4, 7, 8, 2, 13, 12, 1 | 70.07% |
