Results 91 to 100 of about 302,463 (187)

DeepRED Based Sparse SAR Imaging

Remote Sensing
The integration of deep neural networks into sparse synthetic aperture radar (SAR) imaging is explored to enhance SAR imaging performance and reduce the system’s sampling rate. However, the scarcity of training samples and mismatches between the training
Yao Zhao, Qingsong Liu, He Tian, Bingo Wing-Kuen Ling, Zhe Zhang   +4 more
doaj   +1 more source

Comparison of Raw Data-Based and Complex Image-Based Sparse SAR Imaging Methods

Sensors, 2019
Sparse signal processing has already been introduced to synthetic aperture radar (SAR), which shows potential in improving imaging performance based on raw data or a complex image.
Zhilin Xu, Bingchen Zhang, Hui Bi, Chenyang Wu, Zhonghao Wei   +4 more
doaj   +1 more source

The Multi-Frame Imaging Detection of Ultrasonic Guided Waves in Welded Structural Plates Based on Arc Sparse Array with Left Rank

Applied Sciences
The imaging detection of ultrasonic guided waves in plates using arc sparse arrays is highly significant for weld scattering conditions. A novel approach for detecting welded plate structures using the left rank of ultrasonic guided waves in arc sparse ...
Xinjie Zhu, Sen Yao, Mingxi Deng, Jie Zhang, Yan Gao   +4 more
doaj   +1 more source

Array Three-Dimensional SAR Imaging via Composite Low-Rank and Sparse Prior

Remote Sensing
Array three-dimensional (3D) synthetic aperture radar (SAR) imaging has been used for 3D modeling of urban buildings and diagnosis of target scattering characteristics, and represents one of the significant directions in SAR development in recent years ...
Zhiliang Yang, Yangyang Wang, Chudi Zhang, Xu Zhan, Guohao Sun, Yuxuan Liu, Yuru Mao   +6 more
doaj   +1 more source

Variational image regularization with Euler's elastica using a discrete gradient scheme

, 2018
This paper concerns an optimization algorithm for unconstrained non-convex problems where the objective function has sparse connections between the unknowns.
Lazić, Jasmina, Ringholm, Torbjørn, Schönlieb, Carola-Bibiane   +2 more
core  

SAAS-Net: Self-Supervised Sparse Synthetic Aperture Radar Imaging Network with Azimuth Ambiguity Suppression

Remote Sensing
Sparse Synthetic Aperture Radar (SAR) imaging has garnered significant attention due to its ability to suppress azimuth ambiguity in under-sampled conditions, making it particularly useful for high-resolution wide-swath (HRWS) SAR systems.
Zhiyi Jin, Zhouhao Pan, Zhe Zhang, Xiaolan Qiu   +3 more
doaj   +1 more source

Geometrically-Inspired Sparse MIMO Array Design for Enhanced mm-Wave Near-Field Imaging

IEEE Access
In this paper, an efficient method of sparse MIMO array design is proposed to enhance the millimeter-wave near-field imaging by utilizing the geometric properties of the virtual array with uniform coverage of two-dimensional aperture and the minimal ...
Li Ding, Wenlong Yang, Gaoming Tang, Haipo Cui, Ping Li   +4 more
doaj   +1 more source

Structured Bayesian Super-Resolution Forward-Looking Imaging for Maneuvering Platforms Based on Enhanced Sparsity Model

Remote Sensing
Sparse reconstruction-based imaging techniques can be utilized to solve forward-looking imaging problems with limited azimuth resolution. However, these methods perform well only under the traditional model for the platform with low speed, and the ...
Yiheng Guo, Yujie Liang, Yi Liang, Xiangwei Sun   +3 more
doaj   +1 more source

Deep Learning-Based Approximated Observation Sparse SAR Imaging via Complex-Valued Convolutional Neural Network

Remote Sensing
Sparse synthetic aperture radar (SAR) imaging has demonstrated excellent potential in image quality improvement and data compression. However, conventional observation matrix-based methods suffer from high computational overhead, which is hard to use for
Zhongyuan Ji, Lingyu Li, Hui Bi
doaj   +1 more source

Physics-Informed Masked Autoencoder for active sparse imaging. [PDF]

Sci Rep
McEvoy L, Tafone D, Sua YM, Huang Y.
europepmc   +1 more source