Table 4 The entropy values found by 2D-FrMHM and other static systems.

From: An improved reversible watermarking scheme using embedding optimization and quaternion moments

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Algorithm

Red

Green

Blue

Head 512 × 512

Ref.56

7.9964

7.9970

7.9957

Ref.57

7.9957

7.9961

7.9959

Ref.55

7.9954

7.9962

7.9955

Proposed

7.9995

7.9992

7.9991

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