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Advances, Systems and Applications

Table 6 Results of JPEG compression attacks

From: A robust encryption watermarking algorithm for medical images based on ridgelet-DCT and THM double chaos

JPEG compression

4%

8%

15%

25%

30%

40%

PSNR

17.61

19.99

22.01

23.67

24.29

25.06

NC

1.00

1.00

1.00

1.00

1.00

1.00