Ring artifact and Poisson noise attenuation via volumetric multiscale nonlocal collaborative filtering of spatially correlated noise

Mäkinen, Y.; Marchesini, S.; Foi, A.

doi:10.1107/S1600577522002739

Journal of Synchrotron Radiation Journal of
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Figure 1
Top: example noise η_0,p, the corresponding kernels g_0,p and the root PSD $[{|{\cal{F}}\,[g_{0,p}]|}]$ for each noise component in (17)

with $[\varsigma_{0,w}]$ = 6, $[\varsigma_{0,u}]$ = 5, and $[\varsigma_{0,v}]$ = 8, as well as example noise, kernel, and root PSD corresponding to the compound noise η_k. Bottom: example noise, the corresponding kernels, and root PSD of the corresponding binning residuals $[\eta_{k,p}^{\,*}]$ . For all visualizations, the angular dimension of the data is the vertical dimension in the figure. The DC corner of the Fourier spectra is marked by a circle. Note that all root PSDs are nonzero only on the angular DC plane, and the kernels and the noise consist of repeated planes across the angle.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 29| Part 3| May 2022| Pages 829-842

https://doi.org/10.1107/S1600577522002739

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