ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-3/W4, 71-77, 2015
http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-3-W4/71/2015/
doi:10.5194/isprsannals-II-3-W4-71-2015
© Author(s) 2015. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
11 Mar 2015
NON-LOCAL MEANS FILTER FOR POLARIMETRIC SAR SPECKLE REDUCTION-EXPERIMENTS USING TERRASAR-X DATA
J. Hu1, R. Guo2, X. Zhu1,2, G. Baier2, and Y. Wang1 1Helmholtz Young Inverstigators Group “SiPEO”, Technische Universität München, Germany
2Remote Sensing Technology Institute (IMF), German Aerospace Center (DLR), Oberpfaffenhofen, D-82234 Weßling, Germany
Keywords: Non-local means filter, Polarimetric synthetic aperture radar (PolSAR), TerraSAR-X, Similarity analysis, Weight kernel, Speckle reduction, Detail preservation, Polarimetric information preservation Abstract. The speckle is omnipresent in synthetic aperture radar (SAR) images as an intrinsic characteristic. However, it is unwanted in certain applications. Therefore, intelligent filters for speckle reduction are of great importance. It has been demonstrated in several literatures that the non-local means filter can reduce noise while preserving details. This paper discusses non-local means filter for polarimetric SAR (PolSAR) speckle reduction. The impact of different similarity approaches, weight kernels, and parameters in the filter were analysed. A data-driven adaptive weight kernel was proposed. Combined with different similarity measures, it is compared with existing algorithms, using fully polarimetric TerraSAR-X data acquired during the commissioning phase. The proposed approach has overall the best performance in terms of speckle reduction, detail preservation, and polarimetric information preservation. This study suggests the high potential of using the developed non- local means filer for speckle reduction of PolSAR data acquired by the next generation SAR missions, e.g. TanDEM-L and TerraSAR-X NG.
Conference paper (PDF, 6829 KB)


Citation: Hu, J., Guo, R., Zhu, X., Baier, G., and Wang, Y.: NON-LOCAL MEANS FILTER FOR POLARIMETRIC SAR SPECKLE REDUCTION-EXPERIMENTS USING TERRASAR-X DATA, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-3/W4, 71-77, doi:10.5194/isprsannals-II-3-W4-71-2015, 2015.

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