Fig 4. Relative uncertainty and filtering of the power spectrum.
The relative uncertainty (A) of the power spectrum increases with distance from the origin to values above 800%. A filter mask for the power spectrum is achieved from excluding relative uncertainties above δcut. (B-E) show the filtered power spectra for different δcut with the respective inverse Fourier transformations in (F-I). The number of remaining pixels after filtering as well as the error of the uncertainty calculation compared to the Monte-Carlo simulation ΔMC is shown in (J). The mean error, its standard deviation (grey shaded areas) as well as the number of remaining pixels gradually decrease towards a lower threshold δcut. Note that even if 99.5% of the pixels are excluded, the contours of the major image components are still visible (E).