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

Table 6

Comparison of superresolution PSNR for different block and overlap block training dictionaries (superresolution ratio 1 : 2).

Block size	Overlap block	Sample 1	Sample 2	Sample 3	Sample 4	Sample 5
3 × 3	2	31.30	28.21	31.22	30.26	29.70
4 × 4	3	31.96	28.70	31.73	30.54	30.19
5 × 5	4	32.24	28.87	32.04	30.59	30.35
6 × 6	5	32.29	28.90	32.07	30.55	30.32
7 × 7	6	32.11	28.83	32.03	30.40	30.26
8 × 8	7	31.90	28.71	31.93	30.26	30.08
9 × 9	8	31.71	28.60	31.80	30.10	29.93
10 × 10	9	31.43	28.42	31.65	29.95	29.70