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 8
Comparison of fully denoised tomograms of Fly. Top-to-bottom: tomogram reconstructed from a noisy sinogram of the stack of projections Z (4)

, from the estimate of stack of underlying projections $[\widehat{\ln(A)}]$ with proposed procedure with FBP reconstruction, and tomograms of the estimates for streak-free stacks $[\hat{Y}]$ of Münch et al. (2009)

with TV reconstruction, and $[\hat{Y}]$ of Vo et al. (2018)

with TV reconstruction. TV regularization was tuned visually, balancing residual noise and smoothing of signal. Compared with the reference methods, the proposed procedure manages to remove most noise without creating shadowlike artifacts common to Münch et al. (2009)

and Vo et al. (2018)

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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