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Table 2 Comparison of various denoising methods by SSIM (%)

From: Magnitude-phase of the dual-tree quaternionic wavelet transform for multispectral satellite image denoising

Methods

Noise variance

 

15

20

25

30

40

50

Image 1

 

 Noisy image

83.96

76.70

71.03

60.24

53.26

44.57

 VisuShrink

84.63

65.96

66.45

53.19

55.87

36.55

 NeighShrink

73.40

76.50

74.66

71.38

62.47

58.13

 BiShrink

83.09

81.57

76.71

88.85

72.04

74.51

 Proposed algorithm

86.53

85.57

83.61

92.80

74.93

75.78

Image 2

 

 Noisy image

89.28

82.84

77.25

66.08

58.24

48.22

 VisuShrink

83.87

70.32

70.47

64.97

58.80

57.56

 NeighShrink

92.52

87.06

84.67

79.73

71.56

82.86

 BiShrink

91.53

88.23

88.27

75.59

83.88

82.15

 Proposed algorithm

93.81

90.02

88.41

87.83

86.60

86.26

Image 3

 

 Noisy image

70.12

59.94

52.42

39.91

32.68

24.97

 VisuShrink

61.30

53.84

68.96

52.23

51.75

48.07

 NeighShrink

80.80

75.50

71.96

56.63

54.79

52.36

 BiShrink

83.92

80.93

73.37

64.72

64.55

59.46

 Proposed algorithm

84.36

84.62

77.41

69.67

74.01

68.02

  1. Wavelet transform: dual-tree quaternionic wavelet transform with five levels.