The phase-retrieval algorithms represent the core of the toolbox and are grouped into two major classes, one for the direct-contrast regime and the other for the holographic regime. Depending on the problem and particular algorithm, phase retrieval can be performed with or without the different approximations (weak object) and constraints (pure phase or range constraints, single-material and support constraints).

the phase retrieval problem for a hologram of a scene at a single depth at a given time by dented holographic phase retrieval quality, while being flexible as a.

2017 May;176:177-187. doi: 10.1016/j.ultramic.2016.11.003. Epub 2016 Nov 14. Model-based magnetization retrieval from holographic phase images. 2017-02-28 · Compared to traditional phase retrieval approaches, our SPR algorithm uses over an order of magnitude less pixel measurements while maintaining suitable reconstruction quality. We use an on-chip holographic video setup with pixel sub-sampling to experimentally demonstrate a factor of 5.5 increase in sensor frame rate while monitoring the in vivo movement of Peranema microorganisms.

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484-638-8624 Trisomy Eredilink2 retrieval. 484-638-7066 484-638-1788. Holographic Scr-thai. RD22 Red & Green Dot Sight 4 Reticles Reflex Holographic Sights Sight Fit Picatinny Rail Foto. Gå till. Non-interferometric phase retrieval for collinear phase .

Cover story: learning a bilevel hologram dictionary for temporal resolution enhancement in lens-free on-chip video. Publication(s) Images Visualizations Digital refocusing from a holographic snapshot of Paramecium. By applying the aforementioned phase retrieval method, we are capable of recovering the phase information from the hologram captures. » Read more about: Dictionary-based phase

2021-04-21 Cover story: learning a bilevel hologram dictionary for temporal resolution enhancement in lens-free on-chip video. Publication(s) Images Visualizations Digital refocusing from a holographic snapshot of Paramecium. By applying the aforementioned phase retrieval method, we are capable of recovering the phase information from the hologram captures.

Object plane detection and phase retrieval from single-shot holograms using multi-wavelength in-line holography. Applied Optics, Optical Society of America 

Together they form a unique fingerprint. Phase retrieval and the twin-image problem in digital in-line holographic microscopy can be resolved by iterative reconstruction routines. However, recovering the phase properties of an object in a hologram needs an object plane to be chosen correctly for reconstruction. In this work, we present a novel multi-wavelength Gerchberg-Saxton algorithm to determine the object plane using single-shot This article describes scientific software made publicly available for phase retrieval in X-ray propagation imaging. The package is called HoloTomoToolbox and comprises a set of algorithms for phase retrieval in the direct-contrast regime, as well as in the holographic regime, which is used for high-resolution cone-beam synchrotron recordings. James R Fienup. 1982.

Introducing the reference substantially simplifies the resulting phase retrieval problem, which we call holographic phase retrieval: the computational problem is now a linear deconvolution, which is equivalent to solving a linear system [35, 36, 37, 38]. The entailing computation can be further streamlined when certain specific reference shapes are employed. A novel optimization formulation is provided for holographic phase retrieval with data subjected to Poisson shot noise in the low-photon regime.
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Mm-wave Radio Astronomy Instrumentation for  Phase Holographic - Thistle Scientific marknadsför M4:an, Svampbobby digital holography, phase retrieval imaging, and phase contrast imaging techniques. Physica Scripta 1999 (T82), 71, 1999. 5, 1999.

In digital holography, spatial frequency is limited by the electronic devices [ 1 , 2 ]. Low-Photon Holographic Phase Retrieval David A. Barmherzig1 and Ju Sun2 1Center for Computational Mathematics, Flatiron Institute, New York, NY 10010, USA 2Dept. of Computer Science, University of Minnesota, Minneapolis, MN 55455, USA DOE PAGES Journal Article: Holographic phase retrieval and reference design. Holographic phase retrieval and reference design.
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Monolithic focused reference beam x-ray holography Here we report a new concept to decouple the spatial resolution from the image contrast by employing a 

Applied Optics, Optical Society of America  Holographic microscopy has become important in overcoming some of the terahertz digital holography, phase retrieval imaging, and phase  This book introduces applications of computer holography, including phase retrieval algorithm, holographic memory, holographic projection, and deep learning  Object plane detection and phase retrieval from single-shot holograms using multi-wavelength in-line holography. Applied Optics, Optical Society of America  Holographic imaging with a hard x-ray nanoprobe: Ptychographic versus conventional phase retrieval.