Blind data hiding technique using the Fresnelet transform

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Table 1 CC index of the extracted information image

Information embedded images (512 × 512)	USAF (256 × 256) Scaling factor (α)					DDNT (256 × 256) Scaling factor (α)
Information embedded images (512 × 512)	0.03	0.04	0.05	0.06	0.07	0.03	0.04	0.05	0.06	0.07
Camerman	0.9873	0.9920	0.9943	0.9956	0.9965	0.9886	0.9935	0.9957	0.9970	0.9977
Pepper	0.9877	0.9924	0.9946	0.9960	0.9968	0.9889	0.9938	0.9959	0.9971	0.9978
Elaine	0.9875	0.9922	0.9946	0.9960	0.9969	0.9888	0.9936	0.9960	0.9972	0.9979
Lena	0.9877	0.9923	0.9947	0.9969	0.9960	0.9888	0.9937	0.9960	0.9972	0.9980