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. 2025 Sep 13;10(37):43150–43160. doi: 10.1021/acsomega.5c06345

3. Predictive Performance Metrics of the GPR Model Based on 5-fold CV.

metrics L* a* b* K/S
MAE 0.4950 0.1129 0.2441 0.3608
MSE 0.3444 0.0183 0.0993 0.1857
R 2 0.9566 0.9573 0.7295 0.9451