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Table 5 Comparison of PSNR (dB) of reconstructed image “Horse” using the DCT basis for initialization

From: Clustering K-SVD for sparse representation of images

Methods Patch size 6×6 Patch size 8×8
  m = 9 m = 12 m = 15 m = 18 m = 14 m = 20 m = 26 m = 32
K-SVD 19.31 20.98 22.25 23.76 19.24 21.16 22.50 24.07
Method in [28] 19.42 21.13 22.30 23.82 19.49 21.32 22.67 24.28
Method in [29] 24.67 25.83 26.34 26.60 24.22 25.37 26.18 26.49
CK-SVD 25.55 26.16 26.79 27.20 25.41 25.98 26.62 27.03
SwCK-SVD 25.87 26.49 27.07 27.36 25.70 26.28 26.91 27.34
DCK-SVD 25.69 26.27 26.95 27.12 25.60 26.04 26.75 27.11