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Figure 6
Case study extension: single pixel spectrum refinement. Three representative pixels (a)–(c) highlight fitting behavior at very low photon count levels. Using the same parameter initialization from the integrated spectrum fitting, MapsTorch (pink) remains stable and captures weak peaks (e.g. Mn near 6 keV, Cu/Zn near 8 keV and Pt L lines around 10 keV) well, whereas NLopt (purple) under-fits or results in suboptimal fitting quality. These examples reflect the same no-intervention automated setup described in Section 3.3[link]. Spectra are shown as log10(counts+1) versus energy (keV).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 1| January 2026| Pages 235-245
https://doi.org/10.1107/S160057752501032X
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