Table 1.
Comparison of entropy and Peak Signal-to-Noise Ratio (PSNR) on the real-world image for each algorithm compared.
| Image | Entropy | PSNR | ||||
|---|---|---|---|---|---|---|
| Input | Tan | Ours | Tan | Ours | ||
| Figure 6 | Image (1) | 7.0079 | 7.2235 | 7.6043 | 9.9862 | 10.9585 |
| Image (2) | 7.0079 | 7.3420 | 7.0079 | 9.3524 | 9.7479 | |
| Image (3) | 7.0955 | 7.6129 | 7.7114 | 10.6062 | 12.5667 | |
| Image | Input | Nishino | Ours | Nishino | Ours | |
| Figure 7 | Image (1) | 7.1143 | 7.6770 | 7.7742 | 10.1835 | 16.3444 |
| Image (2) | 7.1578 | 6.9343 | 7.2157 | 15.8571 | 15.9809 | |
| Image (3) | 6.5114 | 7.0954 | 7.4754 | 12.1857 | 14.7134 | |
| Image | Input | Fattal | Ours | Fattal | Ours | |
| Figure 8 | Image (1) | 7.0878 | 7.3270 | 7.4739 | 12.6795 | 15.2639 |
| Image (2) | 6.7272 | 6.9164 | 7.6595 | 9.3204 | 12.5983 | |
| Image (3) | 7.1773 | 7.2793 | 7.1832 | 16.1457 | 17.5572 | |
| Image | Input | He | Ours | He | Ours | |
| Figure 9 | Image (1) | 5.6610 | 6.8479 | 7.1597 | 14.4612 | 12.5766 |
| Image (2) | 6.4788 | 6.9625 | 6.9819 | 10.6480 | 18.4398 | |
| Image (3) | 7.1773 | 7.2793 | 7.1832 | 16.1457 | 17.5572 | |