scholarly journals The Multiplexed Imaging Method: High-Resolution Wide Field Imaging Using Physically Small Detectors

2014 ◽  
Vol 126 (936) ◽  
pp. 148-157 ◽  
Author(s):  
Barak Zackay ◽  
Avishay Gal-Yam
Keyword(s):  
High Resolution ◽  
Imaging Method ◽  
Wide Field ◽  
Multiplexed Imaging ◽  
Field Imaging ◽  
Wide Field Imaging

scholarly journals Epsilon-Near-Zero meta-lens for high resolution wide-field imaging

2014 ◽  
Vol 22 (26) ◽  
pp. 31875 ◽  
Author(s):  
Jisoo Kyoung ◽  
Doo Jae Park ◽  
Sun Jung Byun ◽  
Jaeho Lee ◽  
Soo Bong Choi ◽  
...  
Keyword(s):  
High Resolution ◽  
Wide Field ◽  
Field Imaging ◽  
Wide Field Imaging ◽  
Epsilon Near Zero

scholarly journals De-scattering with Excitation Patterning enables rapid wide-field imaging through scattering media

2021 ◽  
Vol 7 (28) ◽  
pp. eaay5496
Author(s):  
Cheng Zheng ◽  
Jong Kang Park ◽  
Murat Yildirim ◽  
Josiah R. Boivin ◽  
Yi Xue ◽  
...  
Keyword(s):  
High Resolution ◽  
Structural Features ◽  
Computational Imaging ◽  
Tissue Imaging ◽  
Wide Field ◽  
Scattering Media ◽  
Temporal Focusing ◽  
Field Imaging ◽  
Wide Field Imaging

Nonlinear optical microscopy has enabled in vivo deep tissue imaging on the millimeter scale. A key unmet challenge is its limited throughput especially compared to rapid wide-field modalities that are used ubiquitously in thin specimens. Wide-field imaging methods in tissue specimens have found successes in optically cleared tissues and at shallower depths, but the scattering of emission photons in thick turbid samples severely degrades image quality at the camera. To address this challenge, we introduce a novel technique called De-scattering with Excitation Patterning or “DEEP,” which uses patterned nonlinear excitation followed by computational imaging–assisted wide-field detection. Multiphoton temporal focusing allows high-resolution excitation patterns to be projected deep inside specimen at multiple scattering lengths due to the use of long wavelength light. Computational reconstruction allows high-resolution structural features to be reconstructed from tens to hundreds of DEEP images instead of millions of point-scanning measurements.

Multi-aperture super-resolution and wide-field imaging method using compressive coding

2017 ◽  
Vol 46 (8) ◽  
pp. 824001
Author(s):  
袁 影 Yuan Ying ◽  
王晓蕊 Wang Xiaorui ◽  
吴雄雄 Wu Xiongxiong ◽  
穆江浩 Mu Jianghao ◽  
张 艳 Zhang Yan
Keyword(s):  
Super Resolution ◽  
Imaging Method ◽  
Wide Field ◽  
Field Imaging ◽  
Wide Field Imaging

Erratum: "High-Resolution, Wide-Field Imaging of the Galactic Center Region at 330 MHz" ([URL ADDRESS="/cgi-bin/resolve?2004AJ....128.1646N" STATUS="OKAY"]AJ, 128, 1646 [2004][/URL])

2006 ◽  
Vol 131 (3) ◽  
pp. 1886
Author(s):  
Michael E. Nord ◽  
T. Joseph W. Lazio ◽  
Namir E. Kassim ◽  
S. D. Hyman ◽  
T. N. LaRosa ◽  
...  
Keyword(s):  
High Resolution ◽  
Galactic Center ◽  
Wide Field ◽  
Center Region ◽  
Field Imaging ◽  
Wide Field Imaging

scholarly journals Direct wide-field radio imaging in real-time at high time resolution using antenna electric fields

2019 ◽  
Vol 491 (1) ◽  
pp. 254-263
Author(s):  
James Kent ◽  
Adam P Beardsley ◽  
Landman Bester ◽  
Steve F Gull ◽  
Bojan Nikolic ◽  
...  
Keyword(s):  
Electric Field ◽  
Real Time ◽  
Electric Fields ◽  
Imaging Method ◽  
Wide Field ◽  
Direct Imaging ◽  
Computational Performance ◽  
Radio Imaging ◽  
Field Imaging ◽  
Wide Field Imaging

ABSTRACT The recent demonstration of a real-time direct imaging radio interferometry correlator represents a new capability in radio astronomy. However, wide-field imaging with this method is challenging since wide-field effects and array non-coplanarity degrade image quality if not compensated for. Here, we present an alternative direct imaging correlation strategy using a direct Fourier transform (DFT), modelled as a linear operator facilitating a matrix multiplication between the DFT matrix and a vector of the electric fields from each antenna. This offers perfect correction for wide field and non-coplanarity effects. When implemented with data from the Long Wavelength Array (LWA), it offers comparable computational performance to previously demonstrated direct imaging techniques, despite having a theoretically higher floating point cost. It also has additional benefits, such as imaging sparse arrays and control over which sky coordinates are imaged, allowing variable pixel placement across an image. It is in practice a highly flexible and efficient method of direct radio imaging when implemented on suitable arrays. A functioning electric field direct imaging architecture using the DFT is presented, alongside an exploration of techniques for wide-field imaging similar to those in visibility-based imaging, and an explanation of why they do not fit well to imaging directly with the digitized electric field data. The DFT imaging method is demonstrated on real data from the LWA telescope, alongside a detailed performance analysis, as well as an exploration of its applicability to other arrays.

scholarly journals The STELLA Robotic Observatory on Tenerife

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
Klaus G. Strassmeier ◽  
Thomas Granzer ◽  
Michael Weber ◽  
Manfred Woche ◽  
Emil Popow ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
High Resolution ◽  
The Other ◽  
Wide Field ◽  
Vacuum Tower ◽  
Echelle Spectrograph ◽  
Human Presence ◽  
Robotic Telescopes ◽  
Field Imaging ◽  
Wide Field Imaging

The Astrophysical Institute Potsdam (AIP) and the Instituto de Astrofísica de Canarias (IAC) inaugurated the robotic telescopes STELLA-I and STELLA-II (STELLar Activity) on Tenerife on May 18, 2006. The observatory is located on the Izaña ridge at an elevation of 2400 m near the German Vacuum Tower Telescope. STELLA consists of two 1.2 m alt-az telescopes. One telescope fiber feeds a bench-mounted high-resolution echelle spectrograph while the other telescope feeds a wide-field imaging photometer. Both scopes work autonomously by means of artificial intelligence. Not only that the telescopes are automated, but the entire observatory operates like a robot, and does not require any human presence on site.

scholarly journals High-Resolution, Wide-Field Imaging of the Galactic Center Region at 330 MHz

2004 ◽  
Vol 128 (4) ◽  
pp. 1646-1670 ◽  
Author(s):  
Michael E. Nord ◽  
T. Joseph W. Lazio ◽  
Namir E. Kassim ◽  
S. D. Hyman ◽  
T. N. LaRosa ◽  
...  
Keyword(s):  
High Resolution ◽  
Galactic Center ◽  
Wide Field ◽  
Center Region ◽  
Field Imaging ◽  
Wide Field Imaging

scholarly journals High-resolution wide-field imaging of perfused capillaries without the use of contrast agent

2011 ◽  
pp. 1095 ◽  
Author(s):  
Grinvald ◽  
Nelson ◽  
Burgansky-Eliash ◽  
Barash ◽  
Anat Loewenstein ◽  
...  
Keyword(s):  
High Resolution ◽  
Contrast Agent ◽  
Wide Field ◽  
Field Imaging ◽  
Wide Field Imaging

scholarly journals Agile wide-field imaging with selective high resolution

2021 ◽  
Author(s):  
Lintao Peng ◽  
Liheng Bian ◽  
Tiexin Liu ◽  
Jun Zhang
Keyword(s):  
High Resolution ◽  
Wide Field ◽  
Field Imaging ◽  
Wide Field Imaging
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