Research Article
Sparse Dictionary-Based Magnetic Resonance Superresolution Imaging with Joint Loss Function Learning
Table 2
The PSNR/SSIM values under different dictionary blocks (superresolution ratio 1 : 4).
| Dictionary block size | Sample set 1 | Sample set 2 | Sample set 3 | Sample set 4 | Sample set 5 |
| 5 × 5 | 29.82/0.8755 | 25.34/0.7913 | 29.16/0.8758 | 27.09/0.8172 | 27.54/0.8201 | 6 × 6 | 30.00/0.8778 | 25.49/0.7948 | 29.38/0.8782 | 27.22/0.8315 | 27.72/0.8285 | 7 × 7 | 30.30/0.8813 | 25.61/0.7996 | 29.49/0.8799 | 27.18/0.8243 | 27.91/0.8366 | 8 × 8 | 30.40/0.8857 | 25.71/0.8107 | 29.72/0.8823 | 27.23/0.8366 | 28.02/0.8434 | 9 × 9 | 30.43/0.8902 | 25.69/0.8238 | 29.78/0.8904 | 27.27/0.8430 | 28.05/0.8541 | 10 × 10 | 30.75/0.9008 | 25.75/0.8323 | 29.94/0.8987 | 27.32/0.8503 | 28.11/0.8635 | 11 × 11 | 30.67/0.8912 | 25.77/0.8285 | 29.90/0.8922 | 27.22/0.8354 | 28.12/0.8634 | 12 × 12 | 30.53/0.8905 | 25.71/0.8274 | 29.82/0.8913 | 27.19/0.8255 | 27.93/0.8413 | 13 × 13 | 30.31/0.8821 | 25.60/0.8002 | 29.64/0.8810 | 27.08/0.8141 | 27.78/0.8224 |
|
|