Table 2 Output MSE for the 3D DCT based filter [33] for four color images in TID2008.

Test image #13

Test image #5

Test image #8

Test image #23

σ ² = 65

σ ² = 130

σ ² = 65

σ ² = 130

σ ² = 65

σ ² = 130

σ ² = 65

σ ² = 130

R

22.0

38.9

17.3

29.1

18.2

33.2

9.0

13.8

G

22.6

40.8

17.3

29.4

17.5

33.4

8.8

13.7

B

24.6

42.1

17.5

29.2

18.8

31.3

9.5

14.6