Filters








562 Hits in 3.7 sec

Fusion of Multi-Baseline and Multi-Orbit InSAR DEMs with Terrain Feature-Guided Filter

Yuting Dong, Baobao Liu, Lu Zhang, Mingsheng Liao, Ji Zhao
2018 Remote Sensing  
As a result of the local edge-preserving capability of the guided filter, the proposed fusion method can preserve terrain details by maintaining gradient consistency and introducing terrain features as  ...  In order to alleviate these two unfavorable factors, in this study, a novel InSAR DEM fusion method with guided filter is developed and assessed with multiple bistatic TanDEM-X InSAR data pairs of different  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs10101511 fatcat:3c3vjrthn5h25lwn2sqwff4cjq

Subsidence monitoring using SAR interferometry: Reduction of the atmospheric effects using stochastic filtering

Michele Crosetto, Carl Christian Tscherning, Bruno Crippa, Manuel Castillo
2002 Geophysical Research Letters  
The atmospheric component of the interferometric phase is estimated adopting a filtering and prediction procedure, which exploits the phase over stable areas identified in the vicinity of the analysed  ...  1] The atmospheric effects represent one of the major limits of SAR interferometry as a quantitative technique to monitor subsidences.  ...  This work has been partially funded by the Italian COFIN 2000, protocol MM04158184, ''Active deformation at the northern boundary of Adria''.  ... 
doi:10.1029/2001gl013544 fatcat:s66fmh6cvbcs7cktrvoyh5nww4

A Fusion Scheme for Joint Retrieval of Urban Height Map and Classification From High-Resolution Interferometric SAR Images

Cline Tison, Florence Tupin, Henri Maitre
2007 IEEE Transactions on Geoscience and Remote Sensing  
His research includes work on image analysis, image understanding, and computer vision, and applications in the domains of satellite and aerial image processing and processing of documents issued from  ...  The interferogram is filtered to remove global noise with an edge-preserving Markovian filtering [11] . It is a low-level operator that improves the information.  ...  Thus, the heights of the filtered interferogram are kept in each pixel (instead of a value per region).  ... 
doi:10.1109/tgrs.2006.887006 fatcat:wf46f3dqf5cqxnm35dpyycix5q

An Adaptive Phase Optimization Algorithm for Distributed Scatterer Phase History Retrieval

Shijin Li, Shubi Zhang, Tao Li, Yandong Gao, Qianfu Chen, Xiang Zhang
2021 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
The adaptive POA artificially constructs a superior CCM by the filtered interferometric phase, which is derived through spatial adaptive filtering approach fusion of principal phase component estimation  ...  Moreover, the modified eigen-decomposition-based maximum-likelihood-estimator of the interferometric phase (EMI) with coherence-power-weighting is proposed to further improve the estimation precision and  ...  Zhangfeng Ma of the Hohai University, Nanjing, China, Dr. Qian He of the Chinese Academy of Surveying and Mapping, Beijing, China, and Dr.  ... 
doi:10.1109/jstars.2021.3070750 fatcat:okm2vla3azbcnl3fcbret3bfdm

Ground deformation mapping by fusion of multi-temporal interferometric synthetic aperture radar images: a review

Lei Zhang, Xiaoli Ding, Zhong Lu
2015 International Journal of Image and Data Fusion  
Fusion of MTInSAR imagery of the same area has led to a marked improvement in the reliability and accuracy of derived products (e.g. deformation) and has also been important for gleaning dynamic signals  ...  of deformation over a wide range of temporal scales.  ...  Disclosure statement No potential conflict of interest was reported by the authors.  ... 
doi:10.1080/19479832.2015.1068874 fatcat:kyt5ckerufdq5lhklzryz4m7aq

Fusion of Remotely Sensed Displacement Measurements: Current status and challenges

Yajing Yan, Amaury Dehecq, Emmanuel Trouve, Gilles Mauris, Noel Gourmelen, Flavien Vernier
2016 IEEE Geoscience and Remote Sensing Magazine  
Methodological development of the fusion of different types of displacement measurements 64 and of the integration of a physical model based on supercomputer facilities seems necessary to improve 65 the  ...  In particular, phase unwrapping de-102 termining the success of the application of DInSAR, is difficult and delicate since the choice of the phase 103 unwrapping method depends on the nature of the interferograms  ...  (c) Original differential interferogram (d) Filtered interferogram by multi-scale phase gradient (e) Unwrapped interferogram using multi-scale phase gradient by a least squares method (f) Wrapped phase  ... 
doi:10.1109/mgrs.2016.2516278 fatcat:bc2avngganasfc2t5v7xo6pzf4

A Multitemporal Method for Correction of Tropospheric Effects in Differential SAR Interferometry: Application to the Gulf of Corinth Earthquake

Ferdaous Chaabane, Antonio Avallone, Florence Tupin, Pierre Briole, Henri Maitre
2007 IEEE Transactions on Geoscience and Remote Sensing  
This technique is validated on a database of 81 differential interferograms covering the Gulf of Corinth (Greece) and used to improve the measurements of ground deformation compared to global positioning  ...  It first requires refined knowledge of the stable scatterers that can only be obtained from the analysis of a large population of multitemporal interferograms.  ...  The work proposed in this paper presents a fusion of improved versions of the two techniques presented previously when a data set of multitemporal interferograms is available.  ... 
doi:10.1109/tgrs.2007.894026 fatcat:mbkxwoq5hrh5bhe3x2oi7embwa

Radar stereo- and interferometry-derived digital elevation models: comparison and combination using Radarsat and ERS-2 imagery

M. Gelautz, P. Paillou, C. W. Chen, H. A. Zebker
2003 International Journal of Remote Sensing  
In the second part of our experiment, we demonstrate that merging the stereoscopic and interferometric DEMs by applying a user-defined weighting function to a filtered coherence map can significantly improve  ...  We find that in regions of high coherence, the DEMs produced by interferometry are of much better quality than the stereo result.  ...  This study was supported by a Max Kade research grant.  ... 
doi:10.1080/0143116031000115139 fatcat:lthexwzovjfxtmoioohk5uad5y

IMPROVED TOPOGRAPHIC MAPPING IN VEGETATED MOUNTAINOUS AREAS BY HIGH-RESOLUTION RADARGRAMMETRY-ASSISTED SAR INTERFEROMETRY

Y. Dong, L. Zhang, M. Liao
2020 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
Specifically speaking, we propose to apply our methods in the TerraSAR-X images with a repeat-pass InSAR pair and a stereo radargrammetric pair sharing the same master image which can avoid radarcoding  ...  Aiming at this limitation of InSAR, we propose the high-resolution radargrammetry-assisted SAR interferometry method to achieve high-precision topographic mapping.  ...  filtering.  ... 
doi:10.5194/isprs-annals-v-3-2020-133-2020 fatcat:4xeh3p6lubbenmqc4odbsll24a

Radar image and data fusion for natural hazards characterisation

Zhong Lu, Daniel Dzurisin, Hyung-Sup Jung, Jixian Zhang, Yonghong Zhang
2010 International Journal of Image and Data Fusion  
To generate a high-quality DEM, these errors must be identified and corrected using a multi-interferogram approach (Lu et al. 2003) .  ...  Typical InSAR processing includes precise registration of an interferometric SAR image pair, common Doppler/bandwidth filter to improve InSAR coherence, interferogram generation, removal of curved Earth  ... 
doi:10.1080/19479832.2010.499219 fatcat:2amyibvgqnek7hyf4thl66gxui

STUDY ON ACCURACY ASSESSMENT OF DEM IN THE MARSH USING WITH INTERFEROMETRIC PALSAR, SENTINEL-1A AND TERRASAR-X IMAGES

B. L. Fu, Y. Li, E. T. Gao, D. L. Fan, P. Q. Lou
2020 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The distribution area of forest and shrub-grass vegetation had a larger coherence coefficient than shallow-water marsh vegetation area and deep-water marsh vegetation area.  ...  In this paper, the interferometric SAR images of L-band ALOS-1 PALSAR, C-band Sentinel-1A and X-band TerraSAR were selected to produce DEM of wetland area in the Honghe National Nature Reserve using the  ...  Figure 2 2 the interferogram of the study area using three SAR data: A was the RGB image derived from wavelet fusion of GF-1 multispectral image and HH polarization Radarsat-2 backscattering intensity  ... 
doi:10.5194/isprs-archives-xlii-3-w10-289-2020 fatcat:xrxgd27jw5f6bpjzjfps2x4p6a

Assimilation of DEMs Generated from Optical Stereo and InSAR Pair through Data Fusion

Ashutosh Bhardwaj
2013 Science Research  
The fusion of imagery from multiple sensors has been in use in remote sensing for scientific exploration in the past but there is a little work done on data fusion application for generation of topography  ...  generation of resultant DEM through data fusion implemented at feature level.  ...  Krishna Murthy, Director, Indian Institute of Remote Sensing, Dehradun for his encouragement and guidance.  ... 
doi:10.11648/j.sr.20130103.12 fatcat:tu7bkg4xhjbkblzqouptwrygcu

TOMOGRAPHIC SAR INVERSION FROM MIXED REPEAT- AND SINGLE-PASS DATA STACKS – THE TERRASAR-X/TANDEM-X CASE

X. X. Zhu, R. Bamler
2012 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
A systematic approach is proposed for the fusion of TerraSAR-X and TanDEM-X data in which the different data quality provided by the TerraSAR-X and TanDEM-X data are taken into account by introducing a  ...  The simulation result shows that the reconstruction accuracy of tomographic SAR inversion can be improved significantly by using jointly fused TerraSAR-X and TanDEM-X data.  ...  The fusion of TerraSAR-X and TanDEM-X data, i.e. adding a couple of TanDEM-X acquisition pairs to the TerraSAR-X data stacks, can be used to improve the result of tomographic SAR inversion from the above  ... 
doi:10.5194/isprsarchives-xxxix-b7-97-2012 fatcat:4qzqxb2ja5dubd6yv3xb2hyalq

Microwave assisted reconstruction of optical interferograms for distributed fiber optic sensing

Jie Huang, Lei Hua, Xinwei Lan, Tao Wei, Hai Xiao
2013 Optics Express  
This paper reports a distributed fiber optic sensing technique through microwave assisted separation and reconstruction of optical interferograms in spectrum domain.  ...  The approach involves sending a microwave-modulated optical signal through cascaded fiber optic interferometers.  ...  To further improve the signal quality, a microwave amplifier could be placed after the photodetector to amplify the converted microwave analog signal.  ... 
doi:10.1364/oe.21.018152 pmid:23938685 fatcat:sv7qfspdfnbfzjd2ggbkyb7cg4

DeepInSAR: A Deep Learning Framework for SAR Interferometric Phase Restoration and Coherence Estimation [article]

Xinyao Sun, Aaron Zimmer, Subhayan Mukherjee, Navaneeth Kamballur Kottayil, Parwant Ghuman, Irene Cheng
2020 arXiv   pre-print
The quality of their interferometric phase is even worse. InSAR phase filtering is an ill-posed problem and plays a key role in subsequent processing.  ...  In this work, we propose a deep convolutional neural network (CNN) based model DeepInSAR to intelligently solve both the phase filtering and coherence estimation problems.  ...  It improves the filtering quality on fringes via better frequency estimation and invalid estimation correction.  ... 
arXiv:1909.03120v2 fatcat:arsibgw75fbo7ne3psskfjgm7a
« Previous Showing results 1 — 15 out of 562 results