Results 231 to 240 of about 14,244,062 (276)

Sub-Aperture Image Stitching of Cylindrical Mirror Surface Defects Based on Dark-Field Imaging

AOPC 2020: Optics Ultra Precision Manufacturing and Testing, 2020
Qun Hao, Qiudong Zhu
exaly   +2 more sources

Opportunistic Bistatic SAR Image Classification Using Sub-aperture Decomposition

2020 13th International Conference on Communications (COMM), 2020
In this article the classification of C -band opportunistic bistatic SAR images is assessed. The acquisition setup assumes Sentinel 1 spaceborne transmitter and the ground-based stationary receiver, COBIS located in an urban area. The synchronization/ echoed data spans many monostatic apertures; thus, an increased angular diversity may be exploited ...
Adrian Focsa, Mihai Datcu, Stefan-Adrian Toma, Andrei Anghel, Remus Cacoveanu   +4 more
openaire   +1 more source

Compressed sensing in ISAR imaging with sparse sub-aperture

Proceedings of 2011 IEEE CIE International Conference on Radar, 2011
In 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, Q. Zhang, J.B. Yan, F.F. Gu, S. Liu   +4 more
openaire   +1 more source

Moving Target Detection based on Sub-aperture Image

2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
In 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

Adaptive complementary neighboring sub‐aperture beamforming for thermoacoustic imaging

Medical Physics
AbstractBackgroundWhen 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, Fuyong, Wang, Wanting, Peng, Ling, Song, Yan, Luo, Zhiqin, Zhao, Lin, Huang   +6 more
openaire   +2 more sources

Synthetic coded aperture snapshot spectral imaging based on coprime sub-aperture sampling

Applied Optics, 2021
The imaging of a large area scene is difficult to achieve for a single camera. Alternatively, a virtual large aperture can be synthesized by sub-aperture cooperation. We propose a solution through the combination of a coded aperture snapshot spectral imager and coprime array.
Yapeng, Zhan, Jiying, Liu, Qi, Yu, Xintong, Tan   +3 more
openaire   +2 more sources

Light Field Image Compression with Sub-apertures Reordering and Adaptive Reconstruction

2018
Light field (LF) attracts tremendous attention due to its capability of recording the intensity of scene objects as well as the direction of the light ray, which also dramatically increases the amount of redundant data. In this paper, we explore the structure of the light field images, and propose a pseudo-sequence based light field image compression ...
Chuanmin Jia, Yekang Yang, Xinfeng Zhang 0001, Shiqi Wang 0001, Shanshe Wang, Siwei Ma 0001   +5 more
openaire   +2 more sources

Lenslet Light Field Panorama Creation: A Sub-Aperture Image Stitching Approach

2018 26th European Signal Processing Conference (EUSIPCO), 2018
Typically, a single light field camera only captures a limited portion of the visual scene and the rendered views offer low spatial resolution since the full sensor resolution also needs to capture the light arriving to the sensor from multiple directions.
Andre Oliveira, Catarina Brites, João Ascenso, Fernando Pereira 0001   +3 more
openaire   +1 more source

Researches for Terahertz Radar’s High-Quality Imaging Method Based on the Sub-Aperture

IEEE Sensors Journal, 2021
Existing Terahertz radar using CSAR mode has the problem of unsatisfactory imaging quality. The target and the noise are mixed in the full-aperture imaging result, which is difficult to use for automatic target recognition; and its sub-aperture-based imaging method not only does not completely solve this problem, but also brings about the problems of ...
Wutong Zeng, Jin Li, Rui Min, Yiming Pi
openaire   +1 more source

A Sub-Aperture Image Selection Refinement Method for Progressive Light Field Transmission

2018 IEEE 20th International Workshop on Multimedia Signal Processing (MMSP), 2018
Light field cameras capture the emanated light from a scene. This type of images allows for changing point of views or focal points by processing the captured information. Recently, a Progressive Light Field Communication (PLFC) was proposed. PLFC addresses an interactive Light Field (LF) streaming framework, where a client requests a certain view or ...
Wallace Bruno S. de Souza, Bruno Macchiavello, Eduardo Peixoto, Edson M. Hung, Gene Cheung   +4 more
openaire   +2 more sources