Results 21 to 30 of about 6,973,682 (218)
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
IEEE Transactions on Geoscience and Remote Sensing, 2022 Here, we present an enhanced algorithm to correct interferometric synthetic aperture radar (InSAR) phase unwrapping errors by incorporating iterative spatial bridging between islands and phase closure among interferograms.
Talib Oliver‐Cabrera +3 more
semanticscholar +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
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
doaj +1 more source
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
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 +2 more sources
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 +4 more sources
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,
Adriana Gonzalez, Laurent Jacques
openaire +3 more sources
Improved Least Squares Phase Unwrapping Method Based on Chebyshev Filter
Applied SciencesPhase unwrapping of high phase noise and steep phase gradient has always been a challenging problem in interferometric synthetic aperture radar (InSAR), in which case the least squares (LS) phase unwrapping method often suffers from significant ...
Guoqing Li, Yake Li, Wenyan Liu
doaj +1 more source
Optics ExpressA universal N-step phase-differencing profilometry (PDP) is proposed. Different from N-step phase shifting profilometry (PSP), by capturing N (N ≥ 3) phase-shifting deformed patterns and establishing what we believe to be a brand-new mathematical model ...
Zhimi Wei +7 more
semanticscholar +1 more source