Results 21 to 30 of about 1,379 (173)
Generation of Complex Transverse Energy Flow Distributions with Autofocusing Optical Vortex Beams
Micromachines, 2021 Optical vortex (OV) beams are widely used for the generation of light fields with transverse energy flow inducing orbital motion of the nano- and microparticles in the transverse plane.
Svetlana N. Khonina +3 more
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High-Resolution ISAR Imaging and Autofocusing via 2D-ADMM-Net
Remote Sensing, 2021 A deep-learning architecture, dubbed as the 2D-ADMM-Net (2D-ADN), is proposed in this article. It provides effective high-resolution 2D inverse synthetic aperture radar (ISAR) imaging under scenarios of low SNRs and incomplete data, by combining model ...
Xiaoyong Li, Xueru Bai, Feng Zhou
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Autofocusing in optical scanning holography [PDF]
Applied Optics, 2009 We present autofocusing in optical scanning holography (OSH) with experimental results. We first record the complex hologram of an object using OSH and then create the Fresnel zone plate (FZP) that codes the object constant within the depth range of the object using Gaussian low-pass filtering.
Kim, Taegeun, Poon, Ting-Chung
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Autofocusing and Self-Healing Optical Vortices Realized via Circular Cubic Phase Modulation
Crystals, 2022 Optical vortices have drawn extensive research interests due to their widespread applications in various fields. Therefore, it is of great significance to modulate optical vortices to endow them with more properties.
Haozhe Xiong +6 more
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Nonparaxial abruptly autofocusing beams [PDF]
Optics Letters, 2016 5 pages, 8 figures.
Raluca-Sorina Penciu +2 more
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Properties of off-axis caustics of autofocusing chirp beams
Компьютерная оптика, 2020 Autofocusing properties of chirp beams with an arbitrary power-law dependence on the radius are studied theoretically and numerically. Two- and three-parameter chirp beams are considered, the parameter variations of which make it possible to effectively ...
A.V. Ustinov, S.N. Khonina
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Polarimetric ISAR autofocusing
IET Signal Processing, 2008 Interest in polarimetric inverse synthetic aperture radar (ISAR) systems has been growing because of their capability to provide extra information about the imaged target compared with single polarisation ISAR systems. Target classification and recognition can be improved by exploiting full polarisation ISAR images.
MARTORELLA, MARCO +4 more
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IEEE Access, 2019 The spaceborne synthetic aperture radar (SAR) system working at P-band, is vulnerable to the ionospheric effect. The ionospheric scintillation will introduce random phase fluctuations into the SAR signal and deteriorate the imaging performance.
Lei Yu +4 more
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A New Autofocusing Method Based on Brightness and Contrast for Color Cameras
Advances in Electrical and Computer Engineering, 2016 The autofocusing is one of the most important features of imaging devices. This feature directly affects the quality of the image taken by the imaging device. Currently, many studies are being performed to improve the feature of autofocusing.
SELEK, M.
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Autofocusing Algorithm for Pixel-Super-Resolved Lensfree On-Chip Microscopy
Frontiers in Physics, 2021 In recent years, lensfree on-chip microscopy has developed into a promising and powerful computational optical microscopy technique that allows for wide-field, high-throughput microscopic imaging without using any lenses.
Yumin Wu +19 more
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