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Table 1 SSIM and PSNR comparisons of image denoising results

From: SSIM-inspired image restoration using sparse representation

Image

Barbara

Lena

Peppers

House

Noise std

20

25

50

100

20

25

50

100

20

25

50

100

20

25

50

100

PSNR comparison (in dB)

   Noisy

22.11

20.17

14.15

8.13

22.11

20.17

14.15

8.13

22.11

20.17

14.15

8.13

22.11

20.17

14.15

8.13

   K-SVD

30.85

29.55

25.44

21.65

32.38

31.32

27.79

24.46

30.80

29.72

26.10

21.84

33.16

32.12

28.08

23.54

   Proposed

30.88

29.53

25.50

21.74

32.26

31.28

27.80

24.53

30.84

29.84

26.25

21.98

33.04

32.09

28.13

23.59

SSIM comparison

   Noisy

0.593

0.503

0.241

0.084

0.531

0.443

0.204

0.074

0.529

0.442

0.212

0.076

0.452

0.368

0.166

0.057

   K-SVD

0.894

0.859

0.708

0.519

0.903

0.877

0.733

0.550

0.905

0.883

0.782

0.601

0.909

0.890

0.779

0.549

   Proposed

0.906

0.875

0.733

0.526

0.913

0.888

0.754

0.573

0.913

0.894

0.797

0.627

0.915

0.901

0.795

0.574