EURASIP Journal on Advances in Signal Processing

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

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