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http://dx.doi.org/10.7780/kjrs.2015.31.3.3

Change detection algorithm based on amplitude statistical distribution for high resolution SAR image  

Lee, Kiwoong (Department of Avionics, Korea Aerospace University)
Kang, Seoli (Department of Avionics, Korea Aerospace University)
Kim, Ahleum (Department of Avionics, Korea Aerospace University)
Song, Kyungmin (Department of Avionics, Korea Aerospace University)
Lee, Wookyung (Department of Avionics, Korea Aerospace University)
Publication Information
Korean Journal of Remote Sensing / v.31, no.3, 2015 , pp. 227-244 More about this Journal
Abstract
Synthetic Aperture Radar is able to provide images of wide coverage in day, night, and all-weather conditions. Recently, as the SAR image resolution improves up to the sub-meter level, their applications are rapidly expanding accordingly. Especially there is a growing interest in the use of geographic information of high resolution SAR images and the change detection will be one of the most important technique for their applications. In this paper, an automatic threshold tracking and change detection algorithm is proposed applicable to high-resolution SAR images. To detect changes within SAR image, a reference image is generated using log-ratio operator and its amplitude distribution is estimated through K-S test. Assuming SAR image has a non-gaussian amplitude distribution, a generalized thresholding technique is applied using Kittler and Illingworth minimum-error estimation. Also, MoLC parametric estimation method is adopted to improve the algorithm performance on rough ground target. The implemented algorithm is tested and verified on the simulated SAR raw data. Then, it is applied to the spaceborne high-resolution SAR images taken by Cosmo-Skymed and KOMPSAT-5 and the performances are analyzed and compared.
Keywords
SAR; Remote sensing; Change detection; High resolution; Cosmo-SkyMed; KOMPSAT-5;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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