Results 61 to 70 of about 22,111 (245)
A Probabilistic Approach for Spatio-Temporal Phase Unwrapping in Multi-Frequency Phase-Shift Coding
IEEE Access, 2022 Multi-frequency techniques with temporally encoded pattern sequences are used in phase-measuring methods of 3D optical metrology to suppress phase noise but lead to ambiguities that can only be resolved by phase unwrapping.
David Uhlig, Michael Heizmann
doaj +1 more source
, 2017 Phase retrieval is one of the most challenging processes in many interferometry techniques. To promote the phase retrieval, Xu et. al [X. Xu, Y. Wang, Y. Xu, W. Jin. 2016] proposed a method based on dual-wavelength interferometry.
Lei, Zhenkun +5 more
core +1 more source
Full-field stress analysis by holographic phase-stepping implementation of the photoelastic-coating method [PDF]
, 2012 In this paper, we describe a system for polariscopic and holographic phase-shifting implementation of the photoelastic-coating method for a full-field stress analysis.
Degrieck, Augustijn +5 more
core +2 more sources
Computation of the One-Dimensional Unwrapped Phase [PDF]
2007 15th International Conference on Digital Signal Processing, 2007 In this paper, the computation of the unwrapped phase of the discrete-time Fourier transform (DTFT) of a one-dimensional finite-length signal is explored. The phase of the DTFT is not unique, and may contain integer multiple of 2 pi discontinuities. The unwrapped phase is the instance of the phase function chosen to ensure continuity.
Zahi N. Karam, Alan V. Oppenheim
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Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.Quantitative phase maps of single cells recorded in flow cytometry modality feed a hierarchical architecture of machine learning models for the label‐free identification of subtypes of ovarian cancer. The employment of a priori clinical information improves the classification performance, thus emulating the clinical application of liquid biopsy during ...
Daniele Pirone +11 more
wiley +1 more source
Quantum Optimization for Phase Unwrapping in SAR Interferometry
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingPhase unwrapping is the reconstruction of a phase given its values mod 2$\pi$. Phase unwrapping is an important image processing technique used in synthetic aperture radar interferometry, in the context of height estimation and ground deformation.
Kay Glatting +3 more
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An Improved Phase Unwrapping Method Based on Hierarchical Networking and Constrained Adjustment
Remote Sensing, 2021 Accurate phase unwrapping (PU) is a precondition and key for using synthetic aperture radar interferometry (InSAR) technology to successfully invert topography and monitor surface deformations. However, most interferograms are seriously polluted by noise
Wenxiang Mao +4 more
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Coil combination using linear deconvolution in k-space for phase imaging [PDF]
, 2019 Background: The combination of multi-channel data is a critical step for the imaging of phase and susceptibility contrast in magnetic resonance imaging (MRI).
Cui, X +5 more
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3D tomographic phase retrieval and unwrapping
Inverse Problems, 2023 Abstract This paper develops uniqueness theory for 3D phase retrieval with finite, discrete measurement data for strong phase objects and weak phase objects, including: (i) Unique determination of (phase) projections from diffraction patterns—General measurement schemes with coded and uncoded apertures are proposed and shown to ensure ...
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Advanced Intelligent Systems, EarlyView.This work presents a robot‐assisted Doppler optical coherence tomography system for autonomous, wide‐field intraoperative assessment of microvascular anastomoses. Machine‐vision–guided probe positioning and adaptive scan planning enable three‐dimensional structural and hemodynamic imaging over extended vessel segments.
Xiaochen Li +10 more
wiley +1 more source