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Figure 8
Local-contrast assessment for near-optimal Paganin-filter parameters using sample (b) as a reference. Column (i) shows ROIs reconstructed with ℓ = 0, ℓstd, and lrmin, respectively; column (ii) gives corresponding blockwise local-contrast maps (standard deviation relative to the local mean), where brighter tones indicate larger intensity dispersion. Consistently, ℓ = 0 gives lower contrast, lrmin yields higher contrast with stronger blur, and ℓstd provides the best compromise for downstream quantitative analysis.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 3| May 2026| Pages 746-758
https://doi.org/10.1107/S1600577526001694
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