In this study, PLSR and SVR were used to build calibration models to assess egg freshness using a full spectral range. The calibration and prediction results obtained from various pre-treatment routines were compared in Table 1. When PLSR was used to establish a calibration model, the pre-treatment routines were R2 p = 0.78, and RMSEP = 5.30% using ‘Autoscale’, which improved predictive capacity compared to the original data (R2p = 0.68, RMSEP = 6.49%). When SVR was used to establish a calibration model, the pre-treatment routines were R2p = 0.85, RMSEP = 4.33% using ‘PCA’. The pre-treatment processes improved little predictive capacity compared to the original data, however, the discrepancy between R2c (1.00) and R2p (0.85) in the original data indicated that the model was over fit for the training samples,
resulting in a poor generalization ability. The above analysis suggests that the SVR calibration model delivers better outcomes, and the pre-treatment is effective and necessary to generate a suitable set of data. To evaluate how accurate the model predicts the value of a component, the root mean standard error value should be compared with the standard deviation of the reference data/