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http://dx.doi.org/10.7780/kjrs.2014.30.4.2

Matching and Geometric Correction of Multi-Resolution Satellite SAR Images Using SURF Technique  

Kim, Ah-Leum (Department of Avionics, Korea Aerospace University)
Song, Jung-Hwan (Department of Avionics, Korea Aerospace University)
Kang, Seo-Li (Department of Avionics, Korea Aerospace University)
Lee, Woo-Kyung (Department of Avionics, Korea Aerospace University)
Publication Information
Korean Journal of Remote Sensing / v.30, no.4, 2014 , pp. 431-444 More about this Journal
Abstract
As applications of spaceborne SAR imagery are extended, there are increased demands for accurate registrations for better understanding and fusion of radar images. It becomes common to adopt multi-resolution SAR images to apply for wide area reconnaissance. Geometric correction of the SAR images can be performed by using satellite orbit and attitude information. However, the inherent errors of the SAR sensor's attitude and ground geographical data tend to cause geometric errors in the produced SAR image. These errors should be corrected when the SAR images are applied for multi-temporal analysis, change detection applications and image fusion with other sensor images. The undesirable ground registration errors can be corrected with respect to the true ground control points in order to produce complete SAR products. Speeded Up Robust Feature (SURF) technique is an efficient algorithm to extract ground control points from images but is considered to be inappropriate to apply to SAR images due to high speckle noises. In this paper, an attempt is made to apply SURF algorithm to SAR images for image registration and fusion. Matched points are extracted with respect to the varying parameters of Hessian and SURF matching thresholds, and the performance is analyzed by measuring the imaging matching accuracies. A number of performance measures concerning image registration are suggested to validate the use of SURF for spaceborne SAR images. Various simulations methodologies are suggested the validate the use of SURF for the geometric correction and image registrations and it is shown that a good choice of input parameters to the SURF algorithm should be made to apply for the spaceborne SAR images of moderate resolutions.
Keywords
Synthetic Aperture Radar; Matching; SURF; RANSAC;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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