Fig. 1. Samples of preserved eggs in different qualities

Fig. 2. Hyperspectral imaging system
1: Computer; 2: Dark box; 3: Lights; 4: Lens;5: CCD camera; 6: Spectrograph; 7: Stepper motor

Fig. 3. Original (a) and mean (b) spectra of egg samples

Fig. 4. Parameter statistics of gel texture

Fig. 5. Correlation between hardness and spectral data transfer (a), correlation between springiness and spectral data transfer (b)

Fig. 6. (a) Two-dimensional correlation synchronization spectra of texture properties of preserved egg gel, (b) 3D stereo plots, (c) Autocorrelation spectra

Fig. 7. Hardness characteristic wavelength distribution (a), springiness characteristic wavelength distribution (b)

Fig. 8. Scatter plot of textural hardness prediction (a), scatter plot of springiness prediction (b)

Fig. 9. Confusion matrix of prediction results and ROC curves of different models