Table 5 Information entropy of the plain image and ciphered image.

From: High-quality restoration image encryption using DCT frequency-domain compression coding and chaos

Picture

Plain image

Cipher image

7.1.10.tiff45

5.9088

7.9981

1.1.13.tiff45

7.2955

7.9986

5.2.10.tiff45

5.7056

7.9987

1.4.10.tiff45

6.9216

7.9996

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