Results 251 to 260 of about 2,700,967 (284)
Some of the next articles are maybe not open access.
Compressed sensing in ISAR imaging with sparse sub-aperture
Proceedings of 2011 IEEE CIE International Conference on Radar, 2011In this paper, a reconstruction method of 2-D ISAR image with sparse sub-aperture based on Compressive Sensing (CS) is proposed. The method is revealed as follows. In the range, the conventional processing can be carried out to obtain sparse spectrogram. In the cross-range, the CS theory can be utilized to reconstruct 2-D ISAR image.
F. Zhu +4 more
openaire +1 more source
Moving Target Detection based on Sub-aperture Image
2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006In conventional monostatic synthetic aperture radar system, it is difficult to detect moving target in clutter background. In this paper, a new algorithm called sub-aperture image cancellation is proposed for moving target detection. In this algorithm, based on Doppler parameters of stationary background, a matched function band is designed for sub ...
W. Zhang, Y. Peng, W. Li
openaire +1 more source
A sub-aperture and blocking autofocus backprojection method for SAR
2015 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), 2015The autofocus backprojection (BP) algorithm based on image sharpness metric has obtained excellent performance for motion error compensation. However, there are still two serious problems should be considered. Firstly, the spatial variance of motion errors is ignored, which can result in azimuth defocus for targets far away from the invisible reference
Kebin Hu +3 more
openaire +1 more source
Polsar Ship Detection with the Sub-Aperture Technology
IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium, 2022Tao Zhang 0027 +4 more
openaire +1 more source
Scene characterization using sub-aperture polarimetric interferometric SAR data
IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004In this paper, a fully polarimetric analysis method is introduced to decompose synthesized interferometric SAR images into sub-aperture data sets, which correspond to the scene responses under different azimuthal look-angles. A statistical analysis of polarimetric parameters permits to clearly discriminate media showing a nonstationary polarimetric ...
Ferro-Famil, Laurent +2 more
openaire +2 more sources
Adaptive complementary neighboring sub‐aperture beamforming for thermoacoustic imaging
Medical PhysicsAbstractBackgroundWhen applied to thermoacoustic imaging (TAI), the delay‐and‐sum (DAS) algorithm produces strong sidelobes due to its disadvantages of uniform aperture weighting. As a result, the quality of TAI images recovered by DAS is often severely degraded by strong non‐coherent clutter, which restricts the development and application of TAI ...
Zeqi, Yang +6 more
openaire +2 more sources
Recent advances in sub-aperture approaches to finishing and metrology
SPIE Proceedings, 2006This paper summarizes some of latest developments by QED Technologies (QED) in the field of high-precision polishing and metrology. Magneto-Rheological Finishing (MRF) is a deterministic sub-aperture polishing process that overcomes many of the fundamental limitations of traditional finishing.
Marc Tricard +3 more
openaire +1 more source
Plane Rotation Error in Sub-Aperture Plane Stitching
2013 CIOMP-OSA Summer Session on Optical Engineering, Design and Manufacturing, 2013In the stitching process based on standard plane, there is error related to measurement error rather than surface, so stitching process is thought to be a process of dealing with the error. In the paper, we call the error Plane Rotation Error (PRE). The comparison of PRE in sequentially stitching and error averaging stitching is introduced later, and ...
Wu Xin, Tang Zhi, Yu Ying-jie
openaire +1 more source
An Autofocus Technique for Sub-aperture Processing of Video-SAR
2015Video-SAR can produce sequential images at high frame rate, providing a continuous surveillance over a region of interest (ROI). To accelerate the speed of image processing, the whole circular path of Video-SAR is divided into several sub-apertures. However, due to the severe coupling of range and cross-range direction of the circular path, standard ...
Ruizhi Hu, Rui Min
openaire +1 more source
Sub-Aperture Antenna Modeling on Fixed Wing Aircraft
2001Abstract : The far field, volumetric radiation patterns for three antenna array configurations installed on a DeHavilland Dash 7 aircraft was determined. The arrays consisted of twenty-six sub-elements that were individually excited to allow arbitrary weighting for post pattern generation. The first two array configurations consisted of dipole elements
Harry T. Shamansky, Allen K. Kominek
openaire +1 more source