Results 151 to 160 of about 6,973,682 (218)

Fast and accurate phase unwrapping

Interspeech 2015, 2015
More and more speech technology and signal processing applications make use of the phase information. A proper estimation and representation of the phase goes inextricably along with a correct phase unwrapping, which refers to the problem of finding the instance of the phase function chosen to ensure continuity.
Thomas Drugman, Yannis Stylianou
openaire   +2 more sources

Knowledge-Aided InSAR Phase Unwrapping Approach

IEEE Transactions on Geoscience and Remote Sensing, 2022
2-D phase unwrapping (PU) is one of the biggest challenges in synthetic aperture radar (SAR) interferometry (InSAR) processing. As an ill-posed problem, the performance of the traditional algorithmic model-based 2-D PU algorithms is not guaranteed to be ...
Hanwen Yu, Xie Hu
semanticscholar   +1 more source

Weighted denoising for phase unwrapping

SPIE Proceedings, 2014
In order to measure the optical distance of the object that changes rapidly over time, Fourier transform method is appropriate because it requires only a single interferogram. In the measurements of such fast phenomena, the thermal noise by the camera to record the interferogram results in a significant error and the signal becomes weak owing to the
Satoshi Tomioka, Shusuke Nishiyama
openaire   +2 more sources

A Phase Slicing 2-D Phase Unwrapping Method Using the L1-Norm

IEEE Geoscience and Remote Sensing Letters, 2022
2-D phase unwrapping (PU) is one of the key steps in the processing of interferometric synthetic aperture radar (InSAR) data. PU in large-gradient areas has always been a fundamental problem.
Yandong Gao, Xinming Tang, Tao Li, Jing Lu, Shijin Li, Qian-Fu Chen, Xiang Zhang   +6 more
semanticscholar   +1 more source

Frequency Estimation by Phase Unwrapping

IEEE Transactions on Signal Processing, 2010
Single frequency estimation is a long-studied problem with application domains including radar, sonar, telecommunications, astronomy and medicine. One method of estimation, called phase unwrapping, attempts to estimate the frequency by performing linear regression on the phase of the received signal.
Robby G. McKilliam, Barry G. Quinn, I. Vaughan L. Clarkson, William Moran 0001   +3 more
openaire   +4 more sources

Spatial phase unwrapping algorithm based on multi-anchors bidirectional location and suppression

Optical Engineering: The Journal of SPIE
. A spatial phase unwrapping algorithm based on multi-anchors bidirectional location and suppression (SPUA-MBLS) is proposed. Spatial phase unwrapping algorithms (SPUAs) can play an important role in three-dimensional (3-D) measurement due to their phase
Ying Zhang, Yi-Ping Cao, Hai-Tao Wu, Cheng-Meng Li   +3 more
semanticscholar   +1 more source

Deep learning phase-unwrapping method based on adaptive noise evaluation.

Applied Optics, 2022
To address the problem of phase unwrapping for interferograms, a deep learning (DL) phase-unwrapping method based on adaptive noise evaluation is proposed to retrieve the unwrapped phase from the wrapped phase.
Xianming Xie, X. Tian, Zhaoyu Shou, Qingning Zeng, Guo-Fu Wang, Qingnan Huang, Mingwei Qin, Xi Gao   +7 more
semanticscholar   +1 more source

Distributed Strain Sensing With Phase Unwrapping Error Suppression Based on Φ-OFDR

Journal of Lightwave Technology
We propose a strain demodulation method with phase unwrapping error suppression based on phase-sensitive optical frequency domain reflectometer (Φ-OFDR), which can achieve wide measurement range, high spatial resolution and fast processing strain sensing.
Keyuan Yang, Jinxin Liu, Chang-Jian Ke, Zhiyuan Gui, Zikang Xv, De-Ming Liu   +5 more
semanticscholar   +1 more source

A Transformer Network for Phase Unwrapping in Fiber-Optic Acoustic Sensors

Journal of Lightwave Technology
Fiber-optic acoustic sensors, such as interferometric fiber-optic sensor array and phase-sensitive optical time-domain reflectometry, have excellent sensitivity and have been widely adopted in applications.
J. Duan, Jia-Geng Chen, Hanzhao Li, Zu-Yuan He   +3 more
semanticscholar   +1 more source

Phase Unwrapping Algorithms: A Comparison

2000
Over the last few years a great deal of work has been done to improve the reliability of phase unwrapping algorithms. Many articles are to be found in the technical literature claiming the robustness and noise immunity of the proposed algorithm.
BALDI, ANTONIO, BERTOLINO, FILIPPO, GINESU, FRANCESCO   +2 more
openaire   +2 more sources