Results 11 to 20 of about 571,490 (277)

Large-scale phase retrieval [PDF]

open access: yesLight: Science & Applications, 2021
Gabriel Popescu
doaj   +2 more sources

AutoPhaseNN: unsupervised physics-aware deep learning of 3D nanoscale Bragg coherent diffraction imaging

open access: yesnpj Computational Materials, 2022
The problem of phase retrieval underlies various imaging methods from astronomy to nanoscale imaging. Traditional phase retrieval methods are iterative and are therefore computationally expensive.
Yudong Yao   +5 more
doaj   +1 more source

Influence of Residual Amplitude and Phase Error for GF-3 Quad-Polarization SAR on Wind Vector Retrieval

open access: yesRemote Sensing, 2022
High-resolution wind vector is important to investigate local winds’ variability over the global ocean. Quad-polarization Synthetic Aperture Radar (SAR) can provide wind vector independently without any external wind direction inputs.
Xiaochen Wang   +5 more
doaj   +1 more source

Reconstruction of Isolated Moving Objects by Motion-Induced Phase Shift Based on PSP

open access: yesApplied Sciences, 2021
The reconstruction of moving objects based on phase shifting profilometry has attracted intensive interests. Most of the methods introduce the phase shift by projecting multiple fringe patterns, which is undesirable in moving object reconstruction as the
Ke Wu, Min Li, Lei Lu, Jiangtao Xi
doaj   +1 more source

On stability of generalized phase retrieval and generalized affine phase retrieval

open access: yesJournal of Inequalities and Applications, 2019
In this paper, we consider the stability of intensity measurement mappings corresponding to generalized phase retrieval and generalized affine phase retrieval in the real case. First, we show the bi-Lipschitz property on measurements of noiseless signals.
Zhitao Zhuang
doaj   +1 more source

Norm Retrieval and Phase Retrieval by Projections

open access: yesAxioms, 2017
We make a detailed study of norm retrieval. We give several classification theorems for norm retrieval and give a large number of examples to go with the theory.
Peter G. Casazza   +3 more
doaj   +1 more source

Solving multiple windowed STFT phase retrieval problems in phase and amplitude respectively

open access: yesApplied Mathematics in Science and Engineering, 2022
We study the Phase Retrieval (PR) problem under the phaseless short-time Fourier transform (STFT) measurements. This paper proposes a novel algorithm named PAR to solve the STFT PR problem in phase and amplitude respectively with a milder retrieval ...
Xianchen Zhou, Hongxia Wang
doaj   +1 more source

Phase retrieval from very few measurements [PDF]

open access: yes, 2013
In many applications, signals are measured according to a linear process, but the phases of these measurements are often unreliable or not available. To reconstruct the signal, one must perform a process known as phase retrieval.
Fickus, Matthew   +3 more
core   +1 more source

Revising the lower statistical limit of x-ray grating-based phase-contrast computed tomography.

open access: yesPLoS ONE, 2017
Phase-contrast x-ray computed tomography (PCCT) is currently investigated as an interesting extension of conventional CT, providing high soft-tissue contrast even if examining weakly absorbing specimen.
Mathias Marschner   +6 more
doaj   +1 more source

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