Table 14 Robustness against JPEG compression attacks.

From: Robust zero-watermarking for color images using hybrid deep learning models and encryption

Attack name

JPEG compression

Factor

5%

10%

20%

30%

40%

Avion

PSNR

NCC

31.3763

1.0000

32.8542

1.0000

34.3613

1.0000

35.2268

1.0000

35.7641

1.0000

Jelly

PSNR

NCC

30.2356

1.0000

33.0536

1.0000

35.2762

0.9995

36.5447

0.9991

37.3929

0.9990

Baboon

PSNR

NCC

29.1392

1.0000

29.5760

1.0000

30.0987

1.0000

30.4482

1.0000

30.6521

0.9991

Sailboat

PSNR

NCC

29.9892

1.0000

30.9633

1.0000

31.9154

1.0000

32.3637

1.0000

32.6343

1.0000

Female

PSNR

NCC

30.9916

1.0000

33.3499

1.0000

36.0481

0.9994

37.6515

1.0000

38.4897

1.0000

Splash

PSNR

NCC

30.9805

1.0000

33.0482

1.0000

35.0845

1.0000

35.9949

1.0000

36.5801

1.0000

Porthead

PSNR

NCC

32.1182

1.0000

34.0507

1.0000

35.8001

1.0000

37.3113

1.0000

37.7567

1.0000

Attack name

JPEG compression

Factor

50%

60%

70%

80%

90%

Avion

PSNR

NCC

36.1267

1.0000

36.5733

1.0000

37.0820

1.0000

37.8384

1.0000

39.1233

1.0000

Jelly

PSNR

NCC

37.8213

0.9997

38.3442

0.9992

38.9532

0.9996

39.8781

0.9991

41.4739

0.9996

Baboon

PSNR

NCC

30.8591

0.9991

31.0708

0.9991

31.3743

0.9982

31.8324

0.9977

32.7037

0.9973

Sailboat

PSNR

NCC

32.8419

1.0000

33.0350

1.0000

33.2845

1.0000

33.6402

1.0000

34.3908

1.0000

Female

PSNR

NCC

39.1666

1.0000

40.1298

1.0000

40.9832

1.0000

42.0596

1.0000

43.8653

1.0000

Splash

PSNR

NCC

36.9447

1.0000

37.4013

1.0000

37.9781

1.0000

38.7025

1.0000

39.8652

1.0000

Porthead

PSNR

NCC

38.5223

1.0000

39.2416

1.0000

39.9404

1.0000

40.7650

1.0000

42.3187

1.0000