Results 171 to 180 of about 4,791 (204)
Some of the next articles are maybe not open access.
Swarm-based algorithm for phase unwrapping
Applied Optics, 2014A novel algorithm for phase unwrapping based on swarm intelligence is proposed. The algorithm was designed based on three main goals: maximum coverage of reliable information, focused effort for better efficiency, and reliable unwrapping. Experiments were performed, and a new agent was designed to follow a simple set of five rules in order to ...
Lucas, da Silva Maciel +1 more
openaire +2 more sources
Morphological phase unwrapping
Optics and Lasers in Engineering, 1999Abstract Phase unwrapping is the process of determining the absolute phase given its principal value. In this paper, we show that morphological image processing techniques can be helpful for solving this problem. The proposed procedure consists of three independent modules.
openaire +1 more source
InSAR phase unwrapping: a polarimetric approach
RADAR 2002, 2003This paper addresses a polarimetric approach to improve the interferometric phase estimation based on an extension of the ESPRIT algorithm applied to different kinds of scatterers. The basics of SAR interferometry are presented. The article introduces the ESPRIT algorithm using polarimetric data with a description of the scattering model, the ESPRIT ...
Guillaso, Stéphane +3 more
openaire +3 more sources
SPIE Proceedings, 1987
An algorithm has been developed for phase unwrapping data that has significant noise content or phase variations. Existing unwrapping algorithms typically operate on a point by point basis. A faulty unwrapping decision will produce an error which will propagate through the rest of the array.
openaire +1 more source
An algorithm has been developed for phase unwrapping data that has significant noise content or phase variations. Existing unwrapping algorithms typically operate on a point by point basis. A faulty unwrapping decision will produce an error which will propagate through the rest of the array.
openaire +1 more source
An Improved Phase-Unwrapping Method for Unwrapped Phase based RFID Localization
2023 IEEE 13th International Conference on RFID Technology and Applications (RFID-TA), 2023Wenhe Wang +4 more
openaire +1 more source
Phase Unwrapping Based Speech Enhancement
2019 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), 2019Speech enhancement is a vital technology for reducing the noise in speech communication. Most speech enhancement methods only estimate magnitude spectrum of clean speech from noisy speech and combine noisy phase spectrum to recover the enhanced speech.
Rui Cheng 0001, Changchun Bao
openaire +1 more source
"Codes" on images and iterative phase unwrapping
Proceedings 2001 IEEE Information Theory Workshop (Cat. No.01EX494), 2002Many imaging techniques, including magnetic resonance imaging and interferometric synthetic aperture radar, produce "phase-wrapped" images. In a phase-wrapped image, the original image values are measured modulus a known wavelength, A. The goal of phase unwrapping is to produce an estimate of the original image using an a priori preference for smooth ...
Brendan J. Frey +2 more
openaire +1 more source
A Phase Unwrapping Algorithm for Interferometric Phase Images
2015Phase unwrapping is the most complicated and unreliable stage of interferometric data processing, which is often used in remote sensing techniques. For real radar scenes, the phase unwrapping problem doesn’t have a unique solution due to phase discontinuity caused by the phase noise and aliasing.
openaire +1 more source