Results 91 to 100 of about 199,781 (299)
Hyper-parameter selection in non-quadratic regularization-based radar image formation [PDF]
, 2008 We consider the problem of automatic parameter selection in regularization-based radar image formation techniques. It has previously been shown that non-quadratic regularization produces feature-enhanced radar images; can yield superresolution; is ...
Batu, Ozge +3 more
core +1 more source
Deep Learning Methods For Synthetic Aperture Radar Image Despeckling: An Overview Of Trends And Perspectives [PDF]
, 2020 Synthetic aperture radar (SAR) images are affected by a spatially-correlated and signal-dependent noise called speckle, which is very severe and may hinder image exploitation. Despeckling is an important task that aims at removing such noise, so as to improve the accuracy of all downstream image processing tasks. The first despeckling methods date back
arxiv +1 more source
Maximum entropy regularization in inverse synthetic aperture radar imagery [PDF]
IEEE Transactions on Signal Processing, 1992 The method of maximum entropy is applied to the regularization of inverse synthetic aperture radar (ISAR) image reconstructions. This is accomplished by considering an ensemble of images with associated 'allowed' probability density functions. Instead of directly considering the 'solution' to be an image, the author takes it to be the a posteriori ...
openaire +2 more sources
Earth Surface Processes and Landforms, Volume 50, Issue 6, May 2025.Located on the high‐energy coast of SW Iceland, the boulder barrier of Valahnúkamöl experienced important morphological changes associated with the morphogenetic impact of storm events over annual to pluri‐decadal timescales. Abstract While many studies have highlighted the high mobility of gravel/pebble beaches due to storm waves, further research is ...
Pierre Stéphan +8 more
wiley +1 more source
Refocusing Moving Ship Targets in SAR Images Based on Fast Minimum Entropy Phase Compensation
Sensors, 2019 Moving ship targets appear blurred and defocused in synthetic aperture radar (SAR) images due to the translation motion during the coherent processing. Motion compensation is required for refocusing moving ship targets in SAR scenes.
Xiangli Huang +4 more
doaj +1 more source
3D Near-Field Millimeter-Wave Synthetic Aperture Radar Imaging [PDF]
arXiv, 2020 In this paper, we present 3D high resolution radar imaging process at millimeter-Wave (mmWave) frequencies by creating the effect of a large aperture synthetically. We use a low cost fully integrated Frequency Modulated Continuous Wave (FMCW) radar operating at $\rm 79\;GHz$ and then perform Synthetic Aperture Radar (SAR) imaging in the near-filed zone.
arxiv
Inferring Discharge From River Geometry on Titan
Geophysical Research Letters, Volume 52, Issue 8, 28 April 2025.Abstract Titan's dense atmosphere, composed mainly of methane and nitrogen, maintains a methane cycle that shapes its surface. Like water on Earth, methane precipitation erodes Titan's surface, carving river networks at all latitudes, as revealed by the Cassini‐Huygens mission.
C. Daudon +4 more
wiley +1 more source
Transmission-Based Imaging of an Electrically Small Aperture in a Shielded System [PDF]
, 2015 International audienceThe possibility of imaging the position and nature of apertures in a metallic shielding is discussed. Synthetic images are obtained from signals induced at the interior of the shielding by a set of plane waves impinging on it along ...
Cozza, Andrea, Monsef, Florian
core +2 more sources
Micro-motion Recognition of Spatial Cone Target Based on ISAR Image Sequences
Journal of Aerospace Technology and Management, 2016 The accurate micro-motions recognition of spatial cone target is the foundation of the characteristic parameteracquisition. For this reason, a micro-motion recognition method based on the distinguishing characteristics extracted from the Inverse ...
ChangYong Shu +4 more
doaj +3 more sources
Multiview ISAR Imaging for Complex Targets Based on Improved SBR Scattering Model
International Journal of Antennas and Propagation, 2021 A novel multiview inverse synthetic aperture radar (ISAR) imaging method is proposed to simulate high-resolution and identifiable ISAR image of complex targets by handling large-angle and wide-bandwidth scattering data.
Tiantian Feng, Lixin Guo
doaj +1 more source