Table 4 Performance analysis in noise level estimation on the image in Fig. 8 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 | 10.83 | 983.20 | 9.90 | 890.33 | 11.61 | 1061.12 | 14.23 | 1323.03 | 4.48 | 348.05 |
3 | 11.23 | 274.27 | 10.59 | 252.90 | 11.49 | 282.95 | 14.67 | 388.92 | 8.58 | 186.15 |
5 | 11.89 | 137.74 | 11.59 | 131.86 | 12.46 | 149.16 | 14.74 | 194.84 | 9.51 | 90.25 |
7 | 12.91 | 84.46 | 13.18 | 88.26 | 13.14 | 87.74 | 15.33 | 118.96 | 10.79 | 54.11 |
10 | 14.77 | 47.74 | 15.70 | 57.04 | 15.33 | 53.27 | 17.05 | 70.52 | 13.23 | 32.25 |
15 | 18.45 | 23.00 | 20.04 | 33.57 | 18.00 | 20.03 | 19.97 | 33.13 | 16.70 | 11.33 |
20 | 22.71 | 13.56 | 24.61 | 23.04 | 23.12 | 15.59 | 22.84 | 14.19 | 20.88 | 4.40 |
25 | 27.26 | 9.05 | 29.23 | 16.92 | 25.20 | 0.81 | 27.25 | 9.00 | 23.92 | 4.32 |
30 | 31.79 | 5.97 | N/A | N/A | 30.59 | 1.95 | 31.68 | 5.60 | 27.28 | 9.07 |
35 | 36.17 | 3.34 | N/A | N/A | 34.53 | 1.35 | 34.57 | 1.23 | 33.67 | 3.81 |
40 | 40.41 | 1.02 | N/A | N/A | 34.66 | 13.35 | 39.59 | 1.02 | 38.42 | 3.95 |
\( \mathrm{Average}\kern0.5em {\overline{\boldsymbol{\varepsilon}}}_{\boldsymbol{r}} \) | 142.17 | N/A | 153.39 | 196.40 | 67.97 | |||||