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Design of ultrasonic synthetic aperture imaging systems based on a non-grid 2D sparse array
(2021-12-01)
This work provides a guide to design ultrasonic synthetic aperture systems for non-grid two-dimensional sparse arrays such as spirals or annular segmented arrays. It presents an algorithm that identifies which elements ...
Improving synthetic aperture image by image compounding in beamforming process
(2011-11-10)
In this work, signal processing techniques are used to improve the quality of image based on multi-element synthetic aperture techniques. Using several apodization functions to obtain different side lobes distribution, a ...
Synthetic aperture ultrasound imaging using GPUs
(Institute of Electrical and Electronics Engineers Inc., 2017-01)
Ultrasound images are widely used for medical diagnosis and for Non-Destructive Testing (NDT) in the industry. Among alternative imaging methods there are the Phased Array techniques, which allow processing ultrasound ...
Mangrove vegetation structure in Southeast Brazil from phased array L-band synthetic aperture radar data
(Spie-soc Photo-optical Instrumentation Engineers, 2016-09-06)
The potential use of phased array type L-band synthetic aperture radar (PALSAR) data for discriminating distinct physiographic mangrove types with different forest structure developments in a subtropical mangrove forest ...
Design and implementation of a mechanical system for a ground based synthetic aperture radar with automatic antenna pointing: Preliminary results
(Institute of Electrical and Electronics Engineers, 2018-01)
Melting of the snow covering the Andes mountains is a negative result of climate change. It affects the ecosystem that surrounds the snow peaks causing the loss of water resources the human life. Motivated by this situation, ...
Improving synthetic aperture image by image compounding in beamforming process
(2011-11-10)
In this work, signal processing techniques are used to improve the quality of image based on multi-element synthetic aperture techniques. Using several apodization functions to obtain different side lobes distribution, a ...
Modeling synthetic aperture radar image data
(Universidade Federal de Pernambuco, 2014)
Sparse arrays and image compounding techniques for non-destructive testing using guided acoustic waves
(2013-06-01)
Piezoelectric array transducers applications are becoming usual in the ultrasonic non-destructive testing area. However, the number of elements can increase the system complexity, due to the necessity of multichannel ...