Results 81 to 90 of about 302,463 (187)

Polca SARA - Full polarization, direction-dependent calibration and sparse imaging for radio interferometry

, 2019
New generation of radio interferometers are envisaged to produce high quality, high dynamic range Stokes images of the observed sky from the corresponding under-sampled Fourier domain measurements.
Birdi, Jasleen, Repetti, Audrey, Wiaux, Yves   +2 more
core   +1 more source

Compressed imaging by sparse random convolution

Optics Express, 2016
The theory of compressed sensing (CS) shows that signals can be acquired at sub-Nyquist rates if they are sufficiently sparse or compressible. Since many images bear this property, several acquisition models have been proposed for optical CS. An interesting approach is random convolution (RC).
Marcos-Gonzalez, Diego, Lasser, Theo, López, Antonio, Bourquard, Aurélien   +3 more
openaire   +3 more sources

Study on the Sparse Sub-block Microwave Imaging Based on Lasso(In English)

Leida xuebao, 2013
Sparse microwave imaging requires nonlinear algorithm that is expensive for large scene imaging. Therefore, the sub-block imaging method is studied, in which the measured data and the relative imaging region is divided into sub-blocks, and then sparse ...
Xiang Yin, Zhang Bing-chen, Hong Wen
doaj   +1 more source

Ultrasonic Phased Array Sparse TFM Imaging Based on Virtual Source and Phase Coherent Weighting

IEEE Access, 2020
Total focus method (TFM) is an ultrasonic phased array imaging method and has a larger dynamic focusing range and higher spatial resolution than traditional imaging methods.
Jin Yang, Lin Luo, Kai Yang, Yu Zhang
doaj   +1 more source

Spaceborne Sparse SAR Imaging Mode Design: From Theory to Implementation

Sensors
To satisfy the requirement of the modern spaceborne synthetic aperture radar (SAR) system, SAR imaging mode design makes a trade-off between resolution and swath coverage by controlling radar antenna sweeping.
Yufan Song, Hui Bi, Fuxuan Cai, Guoxu Li, Jingjing Zhang, Wen Hong   +5 more
doaj   +1 more source

Sparse-TFM Imaging of Lamb Waves for the Near-Distance Defects in Plate-Like Structures

Metals, 2019
The ultrasonic phased array total focusing method (TFM) has the advantages of high imaging resolution and high sensitivity to small defects. However, it has a long imaging time and cannot realize near-distance defect imaging, which limits its application
Haiyan Zhang, Yaqun Liu, Guopeng Fan, Hui Zhang, Wenfa Zhu, Qi Zhu   +5 more
doaj   +1 more source

Sparse imaging and reconstruction tomography for high-speed high-resolution whole-brain imaging. [PDF]

Cell Rep Methods, 2021
Chen H, Huang T, Yang Y, Yao X, Huo Y, Wang Y, Zhao W, Ji R, Yang H, Guo ZV.   +9 more
europepmc   +1 more source

Sparse Imaging of Building Layouts in Ultra-wideband Radar

Leida xuebao, 2018
Ultra-WideBand (UWB) radar can reconstruct the layout of a building, providing rich information for detecting and locating humans in buildings. Traditional imaging methods suffer from serious sidelobes and location displacement of behind-the-wall target ...
Jin Tian, Song Yongping
doaj   +1 more source

Gradual Restraint Habituation for Awake Functional Magnetic Resonance Imaging Combined With a Sparse Imaging Paradigm Reduces Motion Artifacts and Stress Levels in Rodents. [PDF]

Front Neurosci, 2021
Russo G, Helluy X, Behroozi M, Manahan-Vaughan D.   +3 more
europepmc   +1 more source

Residual-conditioned sparse transformer for photoacoustic image artifact reduction

Photoacoustics
Photoacoustic tomography (PAT) combines the high spatial resolution of ultrasound imaging with the high contrast of optical imaging. To reduce acquisition time and lower the cost of photoacoustic imaging, sparse sampling strategy is often employed ...
Xiaoxue Wang, Jinzhuang Xu, Chenglong Zhang, Moritz Wildgruber, Wenjing Jiang, Lili Wang, Xiaopeng Ma   +6 more
doaj   +1 more source