PSR: Unified Framework of Parameter-Learning-Based MR Image Superresolution

Table 5

Effects of dictionary blocks on PSNR (superresolution ratio 1 : 4).

Dictionary blocking size	Sample 1	Sample 2	Sample 3	Sample 4	Sample 5
5 × 5	29.83	25.35	29.16	27.09	27.54
6 × 6	30.00	25.49	29.38	27.22	27.72
7 × 7	30.30	25.61	29.49	27.18	27.91
8 × 8	30.40	25.71	29.72	27.23	28.02
9 × 9	30.43	25.69	29.78	27.27	28.05
10 × 10	30.75	25.75	29.94	27.32	28.11
11 × 11	30.67	25.77	29.90	27.22	28.12
12 × 12	30.53	25.71	29.82	27.19	27.93
13 × 13	30.31	25.60	29.64	27.08	27.78