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Title: Multigrid Optimization for Large-Scale Ptychographic Phase Retrieval

Journal Article · · SIAM Journal on Imaging Sciences
DOI:https://doi.org/10.1137/18m1223915· OSTI ID:1660755

Ptychography is a popular imaging technique that combines diffractive imaging with scanning microscopy. The technique consists of a coherent beam that is scanned across an object in a series of overlapping positions, leading to reliable and improved reconstructions. Ptychographic microscopes allow for large fields to be imaged at high resolution at the cost of additional computational expense. Herein, we propose a multigrid-based optimization framework to reduce the computational burdens of large-scale ptychographic phase retrieval. Our proposed method exploits the inherent hierarchical structures in ptychography through tailored restriction and prolongation operators for the object and data domains. Our numerical results show that our proposed scheme accelerates the convergence of its underlying solver and outperforms the ptychographical iterative engine, a workhorse in the optics community.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1660755
Report Number(s):
P9139-1018; 154026
Journal Information:
SIAM Journal on Imaging Sciences, Vol. 13, Issue 1; ISSN 1936-4954
Publisher:
Society for Industrial and Applied MathematicsCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (39)

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