Fig. 1. Hyperspectral system in laboratory
(a): Physical image of system; (b): Architecture drawing of system

Fig. 2. Hyperspectral image of sample
(a): Raw hyperspectral image; (b): Linear stretched image;(c): The selected region of interest

Fig. 3. The spectral curves and average spectral curves of all samples in different ROI
(a): The spectral curves of all samples in albumen ROI; (b): The spectral curves of all samples in yolk ROI;(c): The average spectral curves of all samples in albumen ROI; (d): The average spectral curves of all samples in yolk ROI

Fig. 4. The effect of the number of bands used in modeling on model accuracy
(a): The changing trend of number of bands; (b): The changing trend of RMSECV of model

Fig. 5. The selected bands through SPA and CARS respectively

Table 1. The identification results of category of eggs using original hyperspectral data of different ROI

Table 2. The identification results of category of eggs using dimension hyperspectral data in yolk ROI