TY - JOUR
T1 - Measuring coseismic displacements with point-like targets offset tracking
AU - Hu, Xie
AU - Wang, Teng
AU - Liao, Mingsheng
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Manuscript received August 17, 2012; revised February 25, 2013; accepted March 25, 2013. Date of publication June 11, 2013; date of current version November 8, 2013. This work was supported in part by the National Key Basic Research Program of China under Grant 2013CB733205, the National Natural Science Foundation of China under Grants 41271457 and 41021061, the National High Technology Research and Development Program of China under Grant 2011AA120404, and the Research Fund for the Doctoral Program of Higher Education of China under Grant 20110141110057.
PY - 2014/1
Y1 - 2014/1
N2 - Offset tracking is an important complement to measure large ground displacements in both azimuth and range dimensions where synthetic aperture radar (SAR) interferometry is unfeasible. Subpixel offsets can be obtained by searching for the cross-correlation peak calculated from the match patches uniformly distributed on two SAR images. However, it has its limitations, including redundant computation and incorrect estimations on decorrelated patches. In this letter, we propose a simple strategy that performs offset tracking on detected point-like targets (PT). We first detect image patches within bright PT by using a sinc-like template from a single SAR image and then perform offset tracking on them to obtain the pixel shifts. Compared with the standard method, the application on the 2010 M 7.2 El Mayor-Cucapah earthquake shows that the proposed PT offset tracking can significantly increase the cross-correlation and thus result in both efficiency and reliability improvements. © 2013 IEEE.
AB - Offset tracking is an important complement to measure large ground displacements in both azimuth and range dimensions where synthetic aperture radar (SAR) interferometry is unfeasible. Subpixel offsets can be obtained by searching for the cross-correlation peak calculated from the match patches uniformly distributed on two SAR images. However, it has its limitations, including redundant computation and incorrect estimations on decorrelated patches. In this letter, we propose a simple strategy that performs offset tracking on detected point-like targets (PT). We first detect image patches within bright PT by using a sinc-like template from a single SAR image and then perform offset tracking on them to obtain the pixel shifts. Compared with the standard method, the application on the 2010 M 7.2 El Mayor-Cucapah earthquake shows that the proposed PT offset tracking can significantly increase the cross-correlation and thus result in both efficiency and reliability improvements. © 2013 IEEE.
UR - http://hdl.handle.net/10754/563298
UR - https://ieeexplore.ieee.org/document/6529097/
UR - http://www.scopus.com/inward/record.url?scp=84888308082&partnerID=8YFLogxK
U2 - 10.1109/LGRS.2013.2256104
DO - 10.1109/LGRS.2013.2256104
M3 - Article
SN - 1545-598X
VL - 11
SP - 283
EP - 287
JO - IEEE Geoscience and Remote Sensing Letters
JF - IEEE Geoscience and Remote Sensing Letters
IS - 1
ER -