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Average CNR values taken over ROIs in the retina (R), healthy human limbus (HL), and human limbus with pinguecula (HLwP) imagery. NSC achieved the best contrast improvement in each type of imagery while maintaining structure.
| Method | CNR (db) | ||
|---|---|---|---|
| R | HL | HLwP | |
| Speckle Contaminated | 0.84 | 2.35 | 0.91 |
| Frost | 2.70 | 5.02 | 2.47 |
| Lee | 2.13 | 3.75 | 1.78 |
| IACD | 3.94 | 9.14 | 5.08 |
| Kuan | 2.57 | 6.98 | 1.471 |
| DPAD | 1.63 | 5.54 | 1.464 |
| SRAD | 1.58 | 11.53 | 1.49 |
| BLSGSM | 2.83 | 5.64 | 5.84 |
| SBSC | 4.09 | 12.68 | 4.29 |
| NSC | 11.53 | 21.81 | 12.15 |
