Results 21 to 30 of about 39,582 (257)
Ultrasonic Synthetic Apertures: Review
Archives of Acoustics, 2014 In the paper the concept of synthetic aperture used for high resolution/high frame rate ultrasonic imaging is reviewed. The synthetic aperture technique allows building extended “virtual” apertures, synthesized from smaller real aperture resulting in ...
Andrzej NOWICKI, Barbara GAMBIN
doaj +1 more source
Camera phasing in multi-aperture coherent imaging
Optics Express, 2012 The resolution of a diffraction-limited imaging system is inversely proportional to the aperture size. Instead of using a single large aperture, multiple small apertures are used to synthesize a large aperture. Such a multi-aperture system is modular, typically more reliable and less costly.
Bahadir K, Gunturk +2 more
openaire +2 more sources
Journal of Natural Resources and Environmental Management, 2021 Landslide is one type of slope movement, where the slope movement includes creep. Although creep movement does not have an impact on the risk of loss of life, this creep movement takes place constantly and invisible which has an impact on economic ...
Jamhur Jamhur +7 more
doaj +1 more source
Fourier ptychography with Scheimpflug optics for multi-aperture applications [PDF]
Imaging and Applied Optics 2017 (3D, AIO, COSI, IS, MATH, pcAOP), 2017 We present a new optical configuration using the Scheimpflug principle for Fourier ptychography microscopy. This configuration minimizes the aberrations present in the off-axis lenses of a multi-aperture Fourier ptychography setup. A 3D printed setup was used to demonstrate the experimental implementation.
Konda, Pavan Chandra +2 more
openaire +1 more source
Analysis of Azimuthal Variations Using Multi-Aperture Polarimetric Entropy with Circular SAR Images
Remote Sensing, 2018 In conventional synthetic aperture radar (SAR), sensors with a fixed look angle are assumed, and the scattering properties are considered as invariant in the azimuth.
Feiteng Xue +6 more
doaj +1 more source
Resolution and sensitivity of wafer-level multi-aperture cameras [PDF]
Journal of Electronic Imaging, 2013 The scaling limits of multi-aperture systems have been widely discussed from an information-theoretical standpoint. While these arguments are valid as an upper limit, the real-world performance of systems for mobile devices remains restricted by optical aberrations.
Alexander Oberdörster +1 more
openaire +1 more source
Design of Miniaturized Cooled Medium-Wave Infrared Curved Bionic Compound-Eye Optical System
PhotonicsTo address the issues of insufficient detector target size and high system complexity in infrared bionic compound-eye systems, this paper designs a miniaturized cooled medium-wave infrared curved bionic compound-eye optical system specifically for large ...
Fu Wang +7 more
doaj +1 more source
Frontiers in Neurorobotics, 2023 IntroductionEither non-invasive somatotopic or substitute sensory feedback is capable of conveying a single modality of sensory information from prosthetic hands to amputees.
Jie Zhang +7 more
doaj +1 more source
In vivo bistatic dual-aperture ultrasound imaging and elastography of the abdominal aorta
Frontiers in PhysiologyIntroduction: In this paper we introduce in vivo multi-aperture ultrasound imaging and elastography of the abdominal aorta. Monitoring of the geometry and growth of abdominal aortic aneurysms (AAA) is paramount for risk stratification and intervention ...
Vera H. J. van Hal +5 more
doaj +1 more source
A Multi-Channel Attention Network for SAR Interferograms Filtering Applied to TomoSAR
Remote Sensing, 2023 Tomographic synthetic aperture radar (TomoSAR) is an advanced synthetic aperture radar (SAR) interferometric technique that can retrieve 3-D spatial information.
Jie Li +3 more
doaj +1 more source