Table 4 Edge Preservation Index (EPI)
From: A robust anisotropic diffusion filter with low arithmetic complexity for images
Methods | Test image | NI | Noise type − S&P Noise % − 20 | Noise type − S&P Noise % − 70 | Noise type-GN + S&P3 Noise % − 0.1 + 20 | Noise type-GN + S&P3 Noise % − 0.1 + 70 |
|---|---|---|---|---|---|---|
EPI | EPI | EPI | EPI | |||
RF λ = 0.25 | Cameraman | 5 | 0.4003 | 0.3288 | 0.3696 | 0.3316 |
Lena | 5 | 0.3560 | 0.3565 | 0.3468 | 0.3457 | |
Pepper | 5 | 0.3551 | 0.3850 | 0.3520 | 0.3861 | |
AMD λ = 0.25 | Cameraman | 5 | 0.4672 | 0.3485 | 0.4040 | 0.3363 |
Lena | 5 | 0.4038 | 0.2490 | 0.3793 | 0.2487 | |
Pepper | 5 | 0.4482 | 0.2705 | 0.4173 | 0.2424 | |
AADF λ = 0.25 | Cameraman | 1 | 0.8831 | 0.5740 | 0.3672 | 0.3356 |
Lena | 1 | 0.9081 | 0.5811 | 0.4220 | 0.4143 | |
Pepper | 1 | 0.8679 | 0.5313 | 0.4134 | 0.4209 | |
FORADF λ = 0.25 | Cameraman | 5 | 0.8495 | 0.5391 | 0.4064 | 0.3297 |
Lena | 5 | 0.8071 | 0.4870 | 0.4340 | 0.3243 | |
Pepper | 5 | 0.7626 | 0.4592 | 0.3639 | 0.3179 |