Table 2.
Percentage scoring of visual and objective evaluation of the original and despeckled images by the experts and the natural image quality evaluation (NIQE) index. Bolded values show best performance.
| Experts | original | First order statistics | Homogeneous mask area | Non-linear filtering | Diffusion | ||||
|---|---|---|---|---|---|---|---|---|---|
| DsFlsmv | DsFwiener | DsFkuhawara | DsFlsminsc | DsFmedian | DsFhybridmedian | DsFnldif | DsFsrad | ||
| Visual Evaluation | |||||||||
| Expert 1 | 33 | 26 | 27 | 65 | 51 | 43 | 71 | 59 | 61 |
| Expert 2 | 40 | 30 | 23 | 77 | 65 | 47 | 75 | 65 | 51 |
|
| |||||||||
| Average % | 37 | 28 | 25 | 71 | 58 | 45 | 73 | 62 | 56 |
|
| |||||||||
| Objective Evaluation | |||||||||
| NIQE | 0.861 | 0.834 | 0.810 | 0.981 | 0.956 | 0.901 | 0.987 | 0.962 | 0.923 |
| Ranking | 7th | 8th | 9th | 2nd | 4th | 6th | 1st | 3rd | 5th |
NIQE: Naturalness image quality evaluation.