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Journal of Applied Remote Sensing • Open Access

Comparative study on the speckle filters for the very high-resolution polarimetric synthetic aperture radar imagery
Author(s): Sheng Sun; Renfeng Liu; Changcai Yang; Huabing Zhou; Ji Zhao; Jiayi Ma

Paper Abstract

With the emergence of very high-resolution airborne synthetic aperture radar systems, it is necessary to reinvestigate these proposed methods with respect to their despeckling performances. As for the very high resolution polarimetric synthetic aperture radar (PolSAR) data, the presumption that the resolution cell is much larger than the radar wavelength becomes ineffective. Therefore, some classic and new filters are thoroughly reviewed. For the evaluation of speckle filters, both indicators for polarimetric information and spatial information are listed. The absolute relative bias is introduced, with the purpose of measuring the filtering performance concerning the indicators for polarimetric information. Moreover, the ratio of half power point width is employed to quantitatively assess the degree of point target preservation. A series of experiments are carried out based on the real PolSAR imagery which is obtained from an uninhabited aerial vehicle synthetic aperture radar system. It can be concluded that existing filters can only attain good performance with reference to part of the indicators. As regards very high-resolution PolSAR imagery, it is necessary to conceive more apposite new filters or make improved versions of the existing filters.

Paper Details

Date Published: 5 November 2016
PDF: 13 pages
J. Appl. Rem. Sens. 10(4) 045014 doi: 10.1117/1.JRS.10.045014
Published in: Journal of Applied Remote Sensing Volume 10, Issue 4
Show Author Affiliations
Sheng Sun, Guangdong Univ. of Technology (China)
Renfeng Liu, Wuhan Polytechnic Univ. (China)
Changcai Yang, Fujian Agriculture and Forestry Univ. (China)
Huabing Zhou, Wuhan Institute of Technology (China)
Ji Zhao, Samsung Advanced Institute of Technology (China)
Jiayi Ma, Wuhan Univ. (China)

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