Dual frequency composite pattern temporal phase unwrapping for 3D surface measurement [PDF]
Scientific ReportsPhase shifting profilometry (PSP) is widely used in three-dimensional (3D) optical metrology applications such as mechanical engineering, industrial monitoring, computer vision, and biomedicine because of its high measurement accuracy.
Tao Tang +5 more
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Three-Dimensional Shape Measurement Using Speckle-Assisted Phase-Order Lines Without Phase Unwrapping [PDF]
SensorsAchieving high-accuracy and high-speed 3D shape measurement remains a significant challenge. This paper presents a novel technique using phase-order lines (POLs), which eliminates the need for phase unwrapping in a binocular system.
Ziyou Zhang, Weipeng Yang
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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
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Temporal phase unwrapping using deep learning. [PDF]
Sci Rep, 2019 AbstractThe multi-frequency temporal phase unwrapping (MF-TPU) method, as a classical phase unwrapping algorithm for fringe projection techniques, has the ability to eliminate the phase ambiguities even while measuring spatially isolated scenes or the objects with discontinuous surfaces. For the simplest and most efficient case in MF-TPU, two groups of
Yin W +7 more
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Time series phase unwrapping algorithm using LP-norm optimization compressive sensing
International Journal of Applied Earth Observations and Geoinformation, 2023 Time series phase unwrapping is an essential step in the time series interferometric synthetic aperture radar technique for deformation monitoring. However, traditional unwrapping algorithms are prone to unwrapping errors in the case of intense noise and
Shijin Li +7 more
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IEEE Access, 2021 Temporal phase unwrapping is among the most robust and efficient phase unwrapping methods in fringe projection profilometry. They can recover the fringe orders even in the presence of surface discontinuities. However, fringe order errors may occur due to
Yiwei Zhang +5 more
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A hybrid method for MT-InSAR phase unwrapping for deformation monitoring in urban areas
International Journal of Applied Earth Observations and Geoinformation, 2022 The accuracy of phase unwrapping in multi-temporal interferometric synthetic aperture radar (MT-InSAR) technology affect closely on the accuracy of ground deformation monitoring.
Songbo Wu +5 more
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An improved method of GB-SAR phase unwrapping for landslide monitoring
Frontiers in Earth Science, 2022 The ground-based Synthetic Aperture Radar (GB-SAR) technique can be applied to the safety monitoring and early warning of geo-hazards, especially for monitoring displacement of various types of landslide masses. One of the key techniques of processing GB-
Xia Xiang +9 more
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Application of ALOS and Envisat Data in Improving Multi-Temporal InSAR Methods for Monitoring Damavand Volcano and Landslide Deformation in the Center of Alborz Mountains, North Iran [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013 InSAR capacity to detect slow deformation over terrain areas is limited by temporal and geometric decorrelations. Multitemporal InSAR techniques involving Persistent Scatterer (Ps-InSAR) and Small Baseline (SBAS) are recently developed to compensate the ...
S. Vajedian, M. Motagh, F. Nilfouroushan
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One-Step Three-Dimensional Phase Unwrapping Approach Based on Small Baseline Subset Interferograms
Remote Sensing, 2020 One of the most critical steps in a multitemporal D-InSAR analysis is the resolution of the phase ambiguities in the context of phase unwrapping. The Extended Minimum Cost Flow approach is one of the potential phase unwrapping algorithms used in the ...
Christina Esch +3 more
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