Results 11 to 20 of about 4,791 (204)
Dual-Stage Phase Unwrapping [PDF]
2019 IEEE Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC), 2019 Energy minimization on large scale problems can be expensive to compute. This paper presents an extension of a primal-dual algorithm to scale to large scale convex energy minimization problems, while guaranteeing the global optimum on convergence.
Bardia Barabadi +4 more
openaire +1 more source
A Robust InSAR Phase Unwrapping Method via Phase Gradient Estimation Network
Remote Sensing, 2021 Phase unwrapping is a critical step in synthetic aperture radar interferometry (InSAR) data processing chains. In almost all phase unwrapping methods, estimating the phase gradient according to the phase continuity assumption (PGE-PCA) is an essential ...
Liming Pu +6 more
doaj +1 more source
Phase Cost Indicator-Guided Central Difference Information Filter 2-D Phase Unwrapping Approach
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 Phase unwrapping (PU) as an ill-posed inverse scientific problem has invariably been the significant difficulty in interferometric synthetic aperture radar technique for topographic mapping.
Yansuo Zhang +3 more
doaj +1 more source
Robust phase unwrapping by convex optimization [PDF]
2014 IEEE International Conference on Image Processing (ICIP), 2014 The 2-D phase unwrapping problem aims at retrieving a "phase" image from its modulo $2π$ observations. Many applications, such as interferometry or synthetic aperture radar imaging, are concerned by this problem since they proceed by recording complex or modulated data from which a "wrapped" phase is extracted. Although 1-D phase unwrapping is trivial,
Gonzalez Gonzalez, Adriana +2 more
openaire +3 more sources
INSAR UNWRAPPING ERROR CORRECTION BASED ON QUASI-ACCURATE DETECTION OF GROSS ERRORS (QUAD) [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 Unwrapping error is a common error in the InSAR processing, which will seriously degrade the accuracy of the monitoring results. Based on a gross error correction method, Quasi-accurate detection (QUAD), the method for unwrapping errors automatic ...
Y. Kang +7 more
doaj +1 more source
Phase-Shifting Projected Fringe Profilometry Using Binary-Encoded Patterns
Photonics, 2021 A phase unwrapping method for phase-shifting projected fringe profilometry is presented. It did not require additional projections to identify the fringe orders. The pattern used for the phase extraction could be used for phase unwrapping directly.
Nai-Jen Cheng, Wei-Hung Su
doaj +1 more source
Stochastic Phase Estimation and Unwrapping
Proceedings of the 8th International Conference on Pattern Recognition Applications and Methods, 2019 Phase-shift is one of the most effective techniques in 3D structured-light scanning for its accuracy and noise resilience. However, the periodic nature of the signal causes a spatial ambiguity when the fringe periods are shorter than the projector resolution. To solve this, many techniques exploit multiple combined signals to unwrap the phases and thus
Mara Pistellato +5 more
openaire +1 more source
Phase Unwrapping via Graph Cuts [PDF]
IEEE Transactions on Image Processing, 2005 Phase unwrapping is the inference of absolute phase from modulo-2pi phase. This paper introduces a new energy minimization framework for phase unwrapping. The considered objective functions are first-order Markov random fields. We provide an exact energy minimization algorithm, whenever the corresponding clique potentials are convex, namely for the ...
José M. Bioucas-Dias, Gonçalo Valadão
openaire +3 more sources
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
doaj +1 more source
Improved weighted least-squares phase unwrapping method for interferometric SAR processing
The Journal of Engineering, 2019 Based on the study of existed least-squares and weighted least-squares phase unwrapping methods, an improved weighted least-squares algorithm based on unwrapping phase error compensation is proposed.
Yu Hui +5 more
doaj +1 more source