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Watermarking approach to embedded signature-based authentication by channel statistics

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Figure 2 illustrates the proposed approach. The signature
Figure 5 compares the measures of reliability with hit ratios. Larger reliability measures are associated with larger hit ratios for all three images
Fig. 5 Experimental comparisons between reliability measure R and hit ratio A obtained by testing a series of JPEG images: (a) Airplane; (b) Lena; and (c) Baboon.
Fig. 6 Experimental comparisons between reliability measure R and entropy H , obtained by testing a series of JPEG images: (a) Airplane; (b) Lena; and (c) Baboon.
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