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Table 5 The PSNR of each method for removing scratches (Unit: dB)

From: Image restoration based on sparse representation using feature classification learning

  BSCB TV DCT K-SVD NLPB Proposed method
Baboon 50.04 52.15 52.18 51.95 51.28 52.15
Barbara 50.63 52.72 54.81 54.24 55.17 54.71
Cameraman 52.07 54.58 52.25 53.34 53.81 53.22
Couple 51.66 54.10 52.36 53.98 52.38 53.87
House 50.73 53.98 52.72 54.14 55.61 56.41
Lena 51.71 52.30 52.82 54.12 52.79 54.20