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Table 6 Comparison of PSNR (dB) of reconstructed image “Horse” using the pre-learned dictionaries 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
Pre-learned 18.72 19.89 21.36 22.53 18.66 19.90 21.51 22.74
K-SVD 19.23 20.79 22.07 23.15 19.10 20.99 22.28 23.87
Method in [28] 19.26 20.94 22.01 23.04 19.20 21.18 22.49 23.35
Method in [29] 22.45 23.62 24.17 24.43 22.02 23.08 23.96 24.30
CK-SVD 23.32 23.90 24.48 24.85 23.07 23.69 24.31 24.78
SwCK-SVD 23.61 24.14 24.73 25.12 23.39 23.98 24.65 25.03
DCK-SVD 23.47 24.02 24.60 24.99 23.22 23.86 24.54 24.95