Fig. 1. GaiaSorter hyperspectral sorter

Fig. 2. Three-dimensional perspective views of the front and back of 100 yuan RMB

Fig. 3. Spectral reflectance curves of the characteristic points on the front and back of real and counterfeit 100 yuan RMB banknotes

Fig. 4. The grayscale images of the front and back of the real and counterfeit 100 yuan RMB banknotes at 500, 660 and 870 nm

Fig. 5. The grayscale images of the real and counterfeit 100 yuan RMB based on band operation

Fig. 6. The first 12 principal components for the front sides of the real and counterfeit 100 yuan RMB

Fig. 7. The first 12 principal components for the back sides of the real and counterfeit 100 yuan RMB

Fig. 8. The texture informations of the grayscale images of the back sides of the real and counterfeit banknotes at 550 nm
From left to right are the mean, variance, inverse difference moment, contrast, dissimilarity, entropy, angle second-order moment, correlations, respectively

Fig. 8. The texture informations of the grayscale images of the front sides of the real and counterfeit banknotes at 550 nm
From left to right are the mean, variance, inverse difference moment, contrast, dissimilarity, entropy, angle second-order moment, correlations, respectively