Zobrazeno 1 - 10
of 763
pro vyhledávání: '"coherent imaging"'
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 15525-15542 (2024)
The coherent nature of imaging in synthetic aperture radar (SAR) inevitably gives rise to speckle noise, a challenge exacerbated by the constrained bandwidth and limited look angles. Among the despeckling algorithms, convolutional neural networks (CN
Externí odkaz:
https://doaj.org/article/170c59b046f74ae8b3985456d08b256d
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 696-704 (2024)
Diffraction limits the minimum resolvable feature on remotely observed targets to $\lambda R_{c}/A_{c}$, where $\lambda$ is the operating wavelength, $R_{c}$ is the range to the target and $A_{c}$ is the diameter of the observing aperture. Resolution
Externí odkaz:
https://doaj.org/article/7785cf0aa5ef441b865c1eeaedc5605d
Autor:
Gianlorenzo Massaro, Milena D’Angelo
Publikováno v:
Sensors, Vol 24, Iss 21, p 6885 (2024)
Recent advancements in quantum and quantum-inspired imaging techniques have enabled high-resolution 3D imaging through photon correlations. These techniques exhibit reduced degradation of image resolution for out-of-focus samples compared to conventi
Externí odkaz:
https://doaj.org/article/b63c8f6d906343aebaad930d059ea34a
Publikováno v:
Remote Sensing, Vol 16, Iss 8, p 1374 (2024)
There is growing demand for the high-fidelity characterization of satellites in Geosynchronous Earth Orbit (GEO) to support Space Domain Awareness (SDA). This is particularly true for newly launched satellites, where it is necessary for satellite pro
Externí odkaz:
https://doaj.org/article/72c31567adda42e3baea2f89152c2915
Publikováno v:
IEEE Photonics Journal, Vol 15, Iss 2, Pp 1-4 (2023)
Coherent diffraction microscopy (CDM) is a potential approach to image micromaterials at atomic resolution without crystals. Due to the lack of high-angle scattering, the achieved resolution is limited to several nanometers. Small-angle scattering al
Externí odkaz:
https://doaj.org/article/dc47edc2b4d14bcfb479a03e2a777fac
Publikováno v:
IEEE Photonics Journal, Vol 15, Iss 1, Pp 1-10 (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. We propose an algorithm for Fourier ptychography based on reweighted amplitude flow (RAF)
Externí odkaz:
https://doaj.org/article/0c2b2b766df54848adde0546ab02be7c
Akademický článek
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Publikováno v:
IEEE Photonics Journal, Vol 14, Iss 6, Pp 1-9 (2022)
Through the relative motion of ladar and object, inverse synthetic aperture ladar can form the virtual synthetic aperture and improve the imaging resolution. On the basis of coherent array detectors with the laser local oscillator, the problem of las
Externí odkaz:
https://doaj.org/article/bbdc89a9064340f59dbfe625729ccac1
Publikováno v:
IEEE Photonics Journal, Vol 14, Iss 4, Pp 1-4 (2022)
We have developed a guided ptychography iterative engine (gPIE) algorithm that applies the concept of optimization to the conventional ePIE (extended ptychography iterative engine) approach. Instead of accessing a random or spiral trajectory among th
Externí odkaz:
https://doaj.org/article/cbca06d0a70c40b7b149384383507f38
Autor:
Sebastian Kalbfleisch, Yuhe Zhang, Maik Kahnt, Khachiwan Buakor, Max Langer, Till Dreier, Hanna Dierks, Philip Stjärneblad, Emanuel Larsson, Korneliya Gordeyeva, Lert Chayanun, Daniel Söderberg, Jesper Wallentin, Martin Bech, Pablo Villanueva-Perez
Publikováno v:
Journal of Synchrotron Radiation, Vol 29, Iss 1, Pp 224-229 (2022)
Coherent X-ray imaging techniques, such as in-line holography, exploit the high brilliance provided by diffraction-limited storage rings to perform imaging sensitive to the electron density through contrast due to the phase shift, rather than convent
Externí odkaz:
https://doaj.org/article/b54c14adef7548318f43594f65d2e755