Table 1 Comparisons of JPEG compression and the proposed method in error rate and image quality for watermarked images with payload 80 bits

P_{QIM − SS − ULPM}

43.55%

41.61

0.9860

29.54%

44.03

0.9928

33.54%

43.40

0.9901

P_{QIM − ULPM − SS}

43.46%

41.65

0.9860

22.67%

44.40

0.9932

37.44%

43.53

0.9902

P_{SS − QIM − ULPM}

33.64%

41.49

0.9851

37.19%

43.84

0.9924

37.56%

43.40

0.9901

P_{SS − ULPM − QIM}

49.82%

41.46

0.9851

26.46%

44.22

0.9930

37.41%

43.55

0.9902

P_{ULPM − QIM − SS}

34.68%

41.52

0.9844

37.26%

43.85

0.9925

37.58%

43.41

0.9901

P_{ULPM − SS − QIM}

37.61%

41.45

0.9842

31.73%

43.61

0.9918

37.38%

43.55

0.9902

JPEG_90

0.11%

34.94

0.9756

0.00%

34.94

0.9754

0.00%

34.90

0.9748

JPEG_70

2.34%

31.62

0.9523

0.00%

31.62

0.9519

5.95%

31.52

0.9491

JPEG_50

2.27%

30.17

0.9359

0.00%

30.18

0.9356

14.36%

30.06

0.9308

JPEG_30

17.94%

28.77

0.9136

0.30%

28.74

0.9199

21.68%

28.67

0.9068

JPEG_10

50.96%

25.40

0.8199

43.36%

25.43

0.8209

49.18%

25.40

0.8168