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EURASIP Journal on Information Security
Fig. 8 | EURASIP Journal on Information Security

Fig. 8

From: Mobile authentication of copy detection patterns

Fig. 8

The 2D t-SNE visualization of the original and fake codes in the spatial domain (a horizontal axis denotes t-SNE dimension 1 and the t-SNE dimension 2 is on the vertical axis): a presents the direct RGB images’ visualization; b is based on the xor difference between the corresponding digital templates and printed codes binarized via a simple thresholding method with an optimal threshold determined individually for each printed code via the Otsu’s method [20]; c visualizes the differences between the physical references and the corresponding printed original and fake codes

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