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Qiuchen Zhai, Gregery T. Buzzard, Kevin Mertes, Brendt Wohlberg and Charles A. Bouman, "Ptychography using Blind Multi-Mode PMACE", IEEE Transactions on Computational Imaging, vol. 11, doi:10.1109/TCI.2025.3609957, pp. 1320--1335, Sep 2025

Abstract

Ptychography is an imaging technique that enables nanometer-scale reconstruction of complex transmittance images by scanning objects with overlapping X-ray illumination patterns. However, the illumination function is typically unknown and only partially coherent, which presents challenges for reconstruction. In this paper, we introduce Blind Multi-Mode Projected Multi-Agent Consensus Equilibrium (BM-PMACE) for blind ptychographic reconstruction. BM-PMACE jointly estimates both the complex transmittance image and the multi-modal probe functions associated with a partially coherent probe source. Importantly, BM-PMACE maintains a location-specific probe state that captures spatially varying probe aberrations. Our method also incorporates a dynamic strategy for integrating additional probe modes. Our experiments on synthetic and measured data demonstrate that BM-PMACE outperforms existing approaches in reconstruction quality and convergence rate.

BibTeX Entry

@article{zhai-2025-ptychography,
author = {Qiuchen Zhai and Gregery T. Buzzard and Kevin Mertes and Brendt Wohlberg and Charles A. Bouman},
title = {Ptychography using Blind Multi-Mode {PMACE}},
year = {2025},
month = Sep,
journal = {IEEE Transactions on Computational Imaging},
volume = {11},
doi = {10.1109/TCI.2025.3609957},
pages = {1320--1335}
}