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EURASIP Journal on Image and Video Processing

Table 1 Base detection threshold for each subband of four-level 9/7 DWT [14]

From: Prediction error preprocessing for perceptual color image compression

Color channel

Orientation

Level

  

1

2

3

4

Y

1

7.02

5.55

5.68

7.25

 

2

11.51

7.34

6.35

7.08

 

3

29.38

14.20

9.77

8.93

 

4

11.51

7.34

6.35

7.08

Cb

1

27.62

23.28

24.22

29.99

 

2

43.39

30.24

27.28

30.24

 

3

107.92

58.72

43.37

40.61

 

4

43.39

30.24

27.28

30.24

Cr

1

12.52

9.64

9.83

12.80

 

2

30.01

17.17

13.64

14.25

 

3

92.32

38.78

23.72

19.73

 

4

30.01

17.17

13.64

14.25

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