Table 1.
Comparison of the performance of despeckling techniques in terms of contrast, CNR and ENL for the three concentrations.
| Contrast [dB] | CNR | ENL | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Region | A | B | C | A | B | C | Abg | Bbg | Cbg |
| Projection | xy | yz | xz | xy | yz | xz | xy | yz | xz |
| 0.3% IL | |||||||||
| Singlelook | 10.1 | 12.8 | 10.4 | 1.4 | 1.5 | 1.3 | 1.2 | 1.1 | 1.3 |
| OOPA | 7.2 | 13.8 | 7.4 | 1.6 | 2.2 | 1.9 | 8.1 | 8.1 | 8.6 |
| BM3D | 9.2 | 11.3 | 9.4 | 1.8 | 2.1 | 1.9 | 8.3 | 5.9 | 8.4 |
| PNLM | 9.2 | 11.5 | 9.4 | 1.7 | 1.8 | 1.7 | 12 | 8.3 | 10 |
| TNode 2D | 9.5 | 12.7 | 10.0 | 2.1 | 2.2 | 2.1 | 20 | 72 | 61 |
| TNode 3D | 9.5 | 12.7 | 10.3 | 2.4 | 2.5 | 2.1 | 12 | 99 | 102 |
|
| |||||||||
| 1% IL. | |||||||||
| Singlelook | 6.6 | 8.1 | 7.6 | 1.0 | 1.1 | 1.2 | 1.2 | 1.1 | 0.9 |
| OOPA | 5.4 | 8.6 | 5.6 | 1.5 | 1.4 | 2.2 | 7.9 | 7.7 | 5.1 |
| BM3D | 5.8 | 7.0 | 6.6 | 1.7 | 1.7 | 1.8 | 7.7 | 7.1 | 5.0 |
| PNLM | 5.3 | 6.5 | 6.0 | 1.4 | 1.4 | 1.8 | 6.5 | 6.9 | 4.7 |
| TNode 2D | 5.4 | 7.1 | 6.6 | 1.8 | 1.6 | 2.6 | 43 | 85 | 44 |
| TNode 3D | 5.5 | 6.9 | 6.8 | 2.4 | 1.8 | 2.9 | 30 | 100 | 65 |
Singlelook parameters are indicated in italics. The best parameter value for each region and quality metric among all despeckling techniques is highlighted in purple. Regions A, B, C and backgrounds Abg, Bbg and Cbg are those defined in Fig. 7.