Table 3 Statistical comparison of noise level estimation on 100 images obtained from the Berkeley image database between different methods
From: Superpixel-based image noise variance estimation with local statistical assessment
JI96 | Z&W09 | MLS09 | SVD13 | Ours | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
σ a | σ e ± std. | ε r (%) | σ e ± std. | ε r (%) | σ e ± std. | ε r (%) | σ e ± std. | ε r (%) | σ e ± std. | ε r (%) |
1 | 5.68 ± 2.26 | 468.22 | 1.25 ± 1.61 | 114.72 | 2.51 ± 2.59 | 150.99 | 3.58 ± 3.35 | 302.81 | 1.87 ± 1.39 | 100.62 |
3 | 6.41 ± 2.05 | 113.78 | 2.75 ± 1.68 | 40.33 | 4.35 ± 2.67 | 46.09 | 4.40 ± 3.05 | 76.67 | 3.61 ± 1.31 | 32.50 |
5 | 7.59 ± 1.78 | 51.86 | 4.78 ± 1.59 | 22.60 | 6.22 ± 2.52 | 25.89 | 5.58 ± 2.76 | 38.80 | 5.42 ± 1.19 | 18.74 |
7 | 9.04 ± 1.55 | 29.14 | 6.62 ± 1.47 | 15.91 | 8.10 ± 2.25 | 17.43 | 6.98 ± 2.47 | 25.75 | 7.80 ± 1.49 | 17.37 |
10 | 11.44 ± 1.29 | 14.89 | 9.45 ± 1.37 | 12.55 | 10.91 ± 2.04 | 11.34 | 9.29 ± 2.10 | 18.07 | 10.57 ± 1.88 | 13.20 |
15 | 15.75 ± 1.09 | 6.61 | 14.12 ± 1.49 | 9.51 | 15.67 ± 1.62 | 6.66 | 13.49 ± 1.69 | 13.70 | 15.47 ± 1.83 | 8.76 |
20 | 20.20 ± 1.10 | 3.75 | 18.65 ± 1.69 | 8.95 | 20.36 ± 1.55 | 4.66 | 17.87 ± 1.43 | 12.01 | 19.71 ± 1.98 | 7.90 |
25 | 24.63 ± 1.28 | 3.25 | 23.04 ± 1.95 | 9.16 | 25.12 ± 1.47 | 3.93 | 22.26 ± 1.22 | 11.43 | 24.36 ± 1.92 | 6.15 |
30 | 29.02 ± 1.53 | 3.93 | N/A | N/A | 29.85 ± 1.47 | 3.46 | 26.78 ± 1.15 | 10.88 | 29.07 ± 1.86 | 5.87 |
35 | 33.30 ± 1.80 | 5.09 | N/A | N/A | 34.46 ± 1.54 | 3.73 | 31.15 ± 1.19 | 11.04 | 33.63 ± 2.24 | 5.49 |
40 | 37.47 ± 2.09 | 6.37 | N/A | N/A | 39.41 ± 1.52 | 3.22 | 35.65 ± 1.13 | 10.89 | 37.91 ± 3.13 | 6.95 |
\( \mathrm{Average}\kern0.5em {\overline{\boldsymbol{\varepsilon}}}_{\boldsymbol{r}} \) | 64.26 | N/A | 25.22 | 48.37 | 20.32 | |||||