Figure 11

Areas of acceptable δ _V and δ _k for different noise cases with marked boundaries for appropriate estimation accuracy. (a) For PSNR; (b) for PSNR-HVS-M and (c) for MSSIM metrics for red color component and (d) for PSNR for green color component. Notations used: black color for image #3, red color for image #13, solid line for the case k = 1; ${\sigma }_{\mathrm{si}}^2$ = 30; dashed line for the case k = 0.2; ${\sigma }_{\mathrm{si}}^2$ = 10; dashed-dotted line for the case k = 0.2; ${\sigma }_{\mathrm{si}}^2$ = 50.