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Figure 12
(a) Impact of sampling density and grid uniformity on denoising performance. Densely sampled data (green) consistently yield superior performance compared with sparsely sampled data (blue/orange), despite the lower SNR per point. For sparse datasets, the standard non-uniform acquisition protocol naturally mimics the effect of our non-stationarity warping approach, explaining the similarity in performance between warped (orange) and non-warped (blue) results. (b, c) Qualitative comparison of denoising the Mn K-edge of MnC14H22N2O8 using a GP denoiser. While the sparsely sampled signal exhibits a higher initial SNR compared with the densely sampled data in (d), the higher sampling density provides stronger constraints on local signal smoothness, resulting in better denoising performance.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 3| May 2026| Pages 658-682
https://doi.org/10.1107/S1600577526001712
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