Figure 4

The fragment of noise-free test image #03 and filtered results for accurate and erroneous estimates. The fragment of noise-free test image #03 (a), its noisy (k = 1.0; ${\sigma }_{\mathrm{si}}^2$ = 30) (b) version for red component and filtered results for accurate estimates (δ _V  = 0; δ _k  = 0) (c) and for erroneous estimates (δ _V  = -0.5; δ _k  = -0.2) (d) of the noise parameters.