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Table 9 The performance evaluation under the geometric attacks

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

Original image attack types Lena Baboon Girl Peppers
PSNR NC2 PSNR NC2 PSNR NC2 PSNR NC2
No attack 48.68 1 46.45 1 48.24 1 49.34 1
Rotate 10° 47.47 0.994 45.30 0.995 47.38 0.994 48.20 0.996
Rotate 30° 46.03 0.993 45.75 0.993 46.63 0.992 47.70 0.994
Shrink 30% 45.49 0.998 43.64 0.995 45.76 0.997 46.59 0.998
Enlarge 20% 47.81 1 45.37 1 47.40 1 48.23 1
Shear 10% 42.39 1 40.57 1 41.63 1 43.28 0.942
Shear 20% 37.57 1 35.54 0.967 37.56 1 38.50 0.907
  1. Note: “Shear 10%” in Table 7 refers to the new image from the left side of the image to cut 10%. “Shear 20%” in Table 7 refers to the new image from the left side and the top of the image to cut 10%