Table 6: Compare the proposed method with the algorithms in [4, 11, 18].

AttacksNC
Reference [4]Reference [11]Reference [18]Our algorithm
(PSNR = 42.02 dB)(PSNR = 44.73 dB)(PSNR = 42.98 dB)(PSNR = 31.14 dB)

Median filter 0.900.880.931
JPEG (ratio = 0.80)0.99NA10.9997
JPEG (ratio = 0.50)0.960.950.960.9976
JPEG (ratio = 0.10)0.340.330.320.9987
Rotation (degree: 0.25°)0.590.610.650.9897
Rotation (degree: −0.25°)0.600.650.720.9900
Cropping 1/40.660.600.670.8561
Scaling 0.880.710.850.9999