Table 2. SNR Results for synthetic experiment.
| Method | SNR(dB) |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| β = 0.1 | β = 0.2 | β = 0.3 | β = 0.4 | β = 0.5 | β = 0.6 | β = 0.7 | β = 0.8 | β = 0.9 | |
| Baseline | 2.61 | 3.70 | 4.88 | 6.13 | 7.40 | 8.53 | 9.25 | 9.31 | 8.67 |
| SRF | 7.60 | 17.00 | 19.72 | 16.80 | 20.34 | 18.85 | 18.05 | 18.47 | 18.11 |
| NCDF | 1.11 | 2.78 | 5.73 | 6.15 | 7.03 | 7.96 | 6.85 | 7.74 | 8.44 |
| DiffusionO | 7.53 | 7.53 | 10.42 | 10.20 | 14.25 | 15.51 | 14.39 | 14.83 | 16.02 |
| Molecular | 4.03 | 4.03 | 7.16 | 9.07 | 12.00 | 10.97 | 11.46 | 10.56 | 10.45 |
| MSVST | 10.68 | 10.68 | 10.50 | 10.78 | 10.56 | 10.97 | 10.48 | 10.56 | 10.64 |
| VWNF | 13.20 | 15.55 | 15.19 | 14.25 | 16.02 | 16.30 | 16.74 | 15.99 | 17.14 |
| PURELET | 5.69 | 6.99 | 9.70 | 9.15 | 10.07 | 12.23 | 10.65 | 9.09 | 11.00 |
Using a photon-conversion factor of (β) 0.5, optimal parameters were found via grid search to produce the highest PSNR for all methods. This table summarizes the SNR, using Eq. 22, values of those parameters applied for the remaining photo-conversion factors. Highest values are shown in bold and the Baseline refers to the noisy synthetic phantom.