Results 31 to 40 of about 3,149 (205)
IEEE Photonics Journal, 2023 Fourier ptychography (FP) is a computational imaging technique with the advantage that it can obtain large field-of-view (FOV) and high-resolution (HR) imaging.
Baopeng Li +6 more
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Molecules, 2022 A series of regioisomers of the hydroxystearic acid (HSA) was prepared, and the effect of the position of the hydroxyl group along the chain on a panel of human cancer cell lines was investigated.
Natalia Calonghi +9 more
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, 2021 Homepage: https://ptychography-4-0.github.io/ptychography/GitHub repository: https://github.com/Ptychography-4-0/ptychography/PyPI: https://pypi.org/project/ptychography40/ Note The Ptychography 4.0 repository and documentation are currently under ...
WeberDieter +12 more
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Deep reinforcement learning for data-driven adaptive scanning in ptychography
Scientific Reports, 2023 We present a method that lowers the dose required for an electron ptychographic reconstruction by adaptively scanning the specimen, thereby providing the required spatial information redundancy in the regions of highest importance. The proposed method is
Marcel Schloz +6 more
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Snapshot ptychography on array cameras
Optics Express, 2022 We use convolutional neural networks to recover images optically down-sampled by 6.7 × using coherent aperture synthesis over a 16 camera array. Where conventional ptychography relies on scanning and oversampling, here we apply decompressive neural estimation to recover full resolution image from a single snapshot, although as shown in simulation ...
Chengyu Wang +4 more
openaire +3 more sources
Low-dose phase retrieval of biological specimens using cryo-electron ptychography
Nature Communications, 2020 Cryo-electron microscopy is widely employed in structural biology and uses phase contrast imaging. Here, the authors employ electron ptychography, a quantitative phase retrieval method for high-contrast, low-dose phase imaging of cryo-state rotavirus and
Liqi Zhou +16 more
doaj +1 more source
, 2018 Polymer electrolyte membrane fuel cells (PEMFCs) are a promising and sustainable alternative to internal combustion engines for automotive applications. Polymeric perfluorosulfonic acid (PFSA) plays a key role in PEMFCs as a proton conductor in the anode
Xiaohui Zhu (209362) +9 more
core +2 more sources
Enhancement of Partially Coherent Diffractive Images Using Generative Adversarial Network
AI, 2022 We present a deep learning-based generative model for the enhancement of partially coherent diffractive images. In lensless coherent diffractive imaging, a highly coherent X-ray illumination is required to image an object at high resolution.
Jong Woo Kim +2 more
doaj +1 more source
Blind ptychography: uniqueness and ambiguities [PDF]
Inverse Problems, 2020 Abstract Ptychography with an unknown mask and object is analyzed for general ptychographic measurement schemes that are strongly connected and possess an anchor. Under a mild constraint on the mask phase, it is proved that the masked object estimate must be the product of a block phase factor and the true masked ...
Albert Fannjiang, Pengwen Chen
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Time-domain ptychography [PDF]
, 2015 Through dedicated measurements in the optical regime we demonstrate that ptychography can be applied to reconstruct complex-valued object functions that vary with time from a sequence of spectral measurements. A probe pulse of approximately 1 ps duration,
Feurer, Thomas +4 more
core +1 more source