Table 1.
Average SNR values taken over ROIs in the retina (R), healthy human limbus (HL), and human limbus with pinguecula (HLwP) imagery. The highest value for each type of imagery is bolded. IACD and SRAD resulted in some high SNR values but at the cost of overcompensation (see Figs. 2 and 4). BLSGSM and NSC had very close improvements to SNR while other methods had less drastic changes.
| Method | SNR (dB) | ||
|---|---|---|---|
| R | HL | HLwP | |
| Speckle Contaminated | 12.0 | 15.2 | 13.5 |
| Frost | 17.4 | 22.1 | 21.2 |
| Lee | 14.9 | 19.4 | 18.4 |
| IACD | 12.4 | 28.3 | 25.8 |
| Kuan | 14.9 | 19.4 | 18.1 |
| DPAD | 9.4 | 14.0 | 12.5 |
| SRAD | 27.6 | 34.8 | 16.9 |
| BLSGSM | 26.6 | 24.9 | 25.6 |
| SBSC | 16.6 | 21.4 | 24.6 |
| NSC | 22.7 | 27.3 | 26.0 |