Results 21 to 30 of about 71,883 (307)

Synthetic aperture-based linear-array photoacoustic tomography considering the aperture orientation effect [PDF]

Journal of Innovative Optical Health Sciences, 2018
The synthetic aperture-based linear-array photoacoustic tomography (PAT) was proposed to address the limited-view shortcomings of the single aperture, but the detection field of view (FOV) determined by the aperture orientation effect was not fully ...
Xiangwei Lin, Jaesok Yu, Naizhang Feng, Mingjian Sun   +3 more
doaj   +1 more source

Doppler Factor in the Omega-k Algorithm for Pulsed and Continuous Wave Synthetic Aperture Radar Raw Data Processing

Applied Sciences, 2023
Synthetic aperture radar (SAR) raw data do not have a direct application; therefore, SAR raw signal processing algorithms are used to generate images that are used for various required applications.
Jhohan Jancco-Chara, Facundo Palomino-Quispe, Roger Jesus Coaquira-Castillo, Julio Cesar Herrera-Levano, Ruben Florez   +4 more
doaj   +1 more source

Focus Measure for Synthetic Aperture Imaging Using a Deep Convolutional Network

IEEE Access, 2019
Synthetic aperture imaging is a technique that mimics a camera with a large virtual convex lens with a camera array. Objects on the focal plane will be sharp and off the focal plane blurry in the synthesized image, which is the most important effect that
Zhao Pei, Li Huang, Yanning Zhang, Miao Ma, Yali Peng, Yee-Hong Yang   +5 more
doaj   +1 more source

InSAR as a tool for monitoring hydropower projects: A review

Energy Geoscience, 2022
This paper provides a review of using Interferometric Synthetic Aperture Radar (InSAR), a microwave remote sensing technique, for deformation monitoring of hydroelectric power projects, a critical infrastructure that requires consistent and reliable ...
J. Aswathi, R.B. Binoj Kumar, T. Oommen, E.H. Bouali, K.S. Sajinkumar   +4 more
doaj   +1 more source

Differential synthetic aperture ladar [PDF]

Optics Letters, 2005
We report a differential synthetic aperture ladar concept that relaxes platform and laser requirements compared with those for conventional synthetic aperture ladar. Line-of-sight translation-vibration constraints are reduced by several orders of magnitude, while laser frequency stability is typically relaxed by an order of magnitude.
Stappaerts, E A, Scharlemann, E
openaire   +2 more sources

Airborne Circularly Polarized Synthetic Aperture Radar

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
In this article, airborne broadband (maximum 400 MHz bandwidth) C-band circularly polarized synthetic aperture radar (SAR) is proposed and developed for further study on airborne compact polarized synthetic aperture radar (CP SAR) system using circular ...
Josaphat Tetuko Sri Sumantyo, Ming Yam Chua, Cahya Edi Santosa, Good Fried Panggabean, Tomoro Watanabe, Bambang Setiadi, Fransiskus Dwikoco Sri Sumantyo, Kengo Tsushima, Karna Sasmita, Agus Mardiyanto, Edy Supartono, Eko Tjipto Rahardjo, Gunawan Wibisono, Muh Aris Marfai, Retnadi Heru Jatmiko, h Sudaryatno, Taufik Hery Purwanto, Barandi Sapta Widartono, Muhammad Kamal, Daniele Perissin, Steven Gao, Koichi Ito   +21 more
doaj   +1 more source

Hybrid Dual-Polarization Synthetic Aperture Radar

Remote Sensing, 2019
Compact polarimetry for a synthetic aperture radar (SAR) system is reviewed. Compact polarimetry (CP) is intended to provide useful polarimetric image classifications while avoiding the disadvantages of space-based quadrature-polarimetric (quad-pol) SARs.
R. Keith Raney
doaj   +1 more source

Ultrasonic Synthetic-Aperture Interface Imaging [PDF]

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2019
Synthetic-aperture (SA) imaging is a popular method to visualize the reflectivity of an object from ultrasonic reflections. The method yields an image of the (volume) contrast in acoustic impedance with respect to the embedding. Typically, constant mass density is assumed in the underlying derivation. Due to the band-limited nature of the recorded data,
Joost van der Neut, Jacob T. Fokkema, Peter M. van den Berg, Michael Zapf, Nicole V. Ruiter, Ulas Taskin, Koen W. A. van Dongen   +6 more
openaire   +4 more sources

A New Classification Approach with Deep Mask R-CNN for Synthetic Aperture Radar Image Segmentation

Elektronika ir Elektrotechnika, 2020
In this paper, a hybrid classification approach which is combined with a more deep mask region-convolutional neural network and sparsity driven despeckling algorithm is proposed for synthetic aperture radar (SAR) image segmentation instead of the ...
Ridvan Yayla, Baha Sen
doaj   +1 more source

Three-Dimensional Imaging of Circular Array Synthetic Aperture Sonar for Unmanned Surface Vehicle

Sensors, 2022
Synthetic aperture sonar (SAS) and interferometric synthetic aperture sonar (InSAS) have a range layover phenomenon during underwater observation, the AUV-mounted circular synthetic aperture sonar (CSAS) system, that insonifies targets using multiple ...
Sai Zeng, Wei Fan, Xuanmin Du
doaj   +1 more source