Table 3 Comparison of invisibility with other schemes.

From: An adaptive robust watermarking scheme based on chaotic mapping

Watermark scheme

PSNR

SSIM

Proposed

45.6135

0.9984

20

36.1600

0.9976

21

33.3300

0.9985

22

51.1286

–

23

42.5503

0.9872

24

42.5503

0.9872

28

42.0200

0.9736

40

50.6200

–

42

35.7000

0.9660

43

46.8600

0.9970

41

52.2229

0.9997

44

40.4668

0.9975

45

28.6591

–

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