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Advances, Systems and Applications

Table 9 Results of up and down translation attacks

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

Dstance (%)

Up

Down

PSNR

NC

PSNR

NC

2

13.79

0.91

15.33

1.00

4

12.40

0.83

13.04

1.00

8

11.54

0.72

12.20

1.00

12

10.62

0.62

11.55

1.00

13

10.46

0.62

11.41

0.90

15

10.16

0.58

11.20

0.90

18

9.60

0.58

10.68

0.90

22

9.16

0.53

10.25

0.90