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Table 2 The calculation results of average value r and radius R under different attacks

From: Adaptive reversible image watermarking algorithm based on IWT and level set

Attack types Average value r Radius R
Original image 79.46 80
Rotate 10° 79.16 80
Rotate 30° 78.83 80
Rotate 45° 78.69 80
Rotate 60° 80.27 80
Shear 10% 79.62 80
Shear 20% 80.11 80