Table 1 Quantitative analysis in noise level estimation with σ a = 1, 3, 5, 7, 10, 15, 20 on the Bird image using different methods
From: Superpixel-based image noise variance estimation with local statistical assessment
JI96 | Z&W09 | MLS09 | SVD13 | Ours | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
σ a | σ e | ε r (%) | σ e | ε r (%) | σ e | ε r (%) | σ e | ε r (%) | σ e | ε r (%) |
1 | 7.43 | 642.71 | 0.00 | 100.00 | 1.39 | 38.73 | 2.96 | 195.76 | 1.10 | 9.71 |
3 | 7.91 | 163.80 | 0.00 | 100.00 | 2.66 | 11.23 | 4.02 | 33.90 | 2.85 | 4.93 |
5 | 8.82 | 76.38 | 2.68 | 46.40 | 4.90 | 1.98 | 5.46 | 9.14 | 4.81 | 3.72 |
7 | 10.00 | 42.89 | 4.43 | 36.67 | 6.84 | 2.31 | 7.11 | 1.55 | 6.47 | 7.58 |
10 | 12.10 | 20.97 | 6.96 | 30.44 | 9.65 | 3.5 | 9.88 | 1.17 | 9.63 | 3.73 |
15 | 16.13 | 7.55 | 11.24 | 25.05 | 14.66 | 2.24 | 14.85 | 0.97 | 14.49 | 3.43 |
20 | 20.15 | 0.07 | 15.32 | 23.40 | 19.03 | 4.83 | 19.73 | 1.35 | 17.92 | 10.42 |
\( \mathrm{Average}\kern0.5em {\overline{\boldsymbol{\varepsilon}}}_{\boldsymbol{r}} \) | 136.34 | 51.71 | 9.26 | 34.83 | 6.22 | |||||