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Stable ptychographic phase retrieval via lost subspace completion.
In: (28th European Signal Processing Conference (EUSIPCO), 24-28 August 2020). IEEE, 2020. 975-979 ( ; 2021-January)
In this paper, we consider a special case of the phase retrieval problem called ptychography. Its is a popular technique of imaging, based on local illuminations of a specimen and further reconstruction from the far field diffraction patterns. The stability and success of the recovery process is heavily based on the choice of the illumination function commonly called a window. It describes the distribution of the light along the measured region. While for some windows the conditioning can be controlled, many important classes of windows, such as Gaussian windows, were not covered. We present a subspace completion method, which allows for a well-conditioned reconstruction for a much wider choice of windows, including Gaussian windows.
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Publication type
Article: Conference contribution
Keywords
Phase Retrieval ; Ptychography ; Regularization
ISSN (print) / ISBN
2219-5491
Conference Title
28th European Signal Processing Conference (EUSIPCO)
Conference Date
24-28 August 2020
Quellenangaben
Volume: 2021-January,
Pages: 975-979
Publisher
IEEE
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Institute(s)
Institute of Computational Biology (ICB)