Improved SAR Image Coregistration Using Pixel-Offset Series

Handle URI:
http://hdl.handle.net/10754/556642
Title:
Improved SAR Image Coregistration Using Pixel-Offset Series
Authors:
Wang, Teng ( 0000-0003-3729-0139 ) ; Jonsson, Sigurjon ( 0000-0001-5378-7079 ) ; Hanssen, Ramon F.
Abstract:
Synthetic aperture radar (SAR) image coregistration is a key procedure before interferometric SAR (InSAR) time-series analysis can be started. However, many geophysical data sets suffer from severe decorrelation problems due to a variety of reasons, making precise coregistration a nontrivial task. Here, we present a new strategy that uses a pixel-offset series of detected subimage patches dominated by point-like targets (PTs) to improve SAR image coregistrations. First, all potentially coherent image pairs are coregistered in a conventional way. In this step, we propose a coregistration quality index for each image to rank its relative “significance” within the data set and to select a reference image for the SAR data set. Then, a pixel-offset series of detected PTs is made from amplitude maps to improve the geometrical mapping functions. Finally, all images are resampled depending on the pixel offsets calculated from the updated geometrical mapping functions. We used images from a rural region near the North Anatolian Fault in eastern Turkey to test the proposed method, and clear coregistration improvements were found based on amplitude stability. This enhanced the fact that the coregistration strategy should therefore lead to improved InSAR time-series analysis results.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Improved SAR Image Coregistration Using Pixel-Offset Series 2014, 11 (9):1465 IEEE Geoscience and Remote Sensing Letters
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Geoscience and Remote Sensing Letters
Issue Date:
14-Mar-2014
DOI:
10.1109/LGRS.2013.2295429
Type:
Article
ISSN:
1545-598X; 1558-0571
Additional Links:
http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6722906
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Tengen
dc.contributor.authorJonsson, Sigurjonen
dc.contributor.authorHanssen, Ramon F.en
dc.date.accessioned2015-06-10T11:14:26Zen
dc.date.available2015-06-10T11:14:26Zen
dc.date.issued2014-03-14en
dc.identifier.citationImproved SAR Image Coregistration Using Pixel-Offset Series 2014, 11 (9):1465 IEEE Geoscience and Remote Sensing Lettersen
dc.identifier.issn1545-598Xen
dc.identifier.issn1558-0571en
dc.identifier.doi10.1109/LGRS.2013.2295429en
dc.identifier.urihttp://hdl.handle.net/10754/556642en
dc.description.abstractSynthetic aperture radar (SAR) image coregistration is a key procedure before interferometric SAR (InSAR) time-series analysis can be started. However, many geophysical data sets suffer from severe decorrelation problems due to a variety of reasons, making precise coregistration a nontrivial task. Here, we present a new strategy that uses a pixel-offset series of detected subimage patches dominated by point-like targets (PTs) to improve SAR image coregistrations. First, all potentially coherent image pairs are coregistered in a conventional way. In this step, we propose a coregistration quality index for each image to rank its relative “significance” within the data set and to select a reference image for the SAR data set. Then, a pixel-offset series of detected PTs is made from amplitude maps to improve the geometrical mapping functions. Finally, all images are resampled depending on the pixel offsets calculated from the updated geometrical mapping functions. We used images from a rural region near the North Anatolian Fault in eastern Turkey to test the proposed method, and clear coregistration improvements were found based on amplitude stability. This enhanced the fact that the coregistration strategy should therefore lead to improved InSAR time-series analysis results.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6722906en
dc.rights(c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.en
dc.subjectImage coregistrationen
dc.subjectinterferometric SAR (InSAR)en
dc.subjectpixel offsetsen
dc.subjectsynthetic aperture radar (SAR)en
dc.titleImproved SAR Image Coregistration Using Pixel-Offset Seriesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalIEEE Geoscience and Remote Sensing Lettersen
dc.eprint.versionPost-printen
dc.contributor.institutionDelft University of Technology, Delft, the Netherlandsen
kaust.authorWang, Tengen
kaust.authorJonsson, Sigurjonen
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