Efficient speckle filtering of SAR images

Author

Hagg, Wilhelm ; Sties, Manfred

Author_Institution

Karlsruhe Univ., Germany

Volume

4

fYear

1994

fDate

8-12 Aug 1994

Firstpage

2140

Abstract

A new promising method of speckle filtering is described and applied to both, synthetically generated and real SAR-images. The new method, which the authors call EPOS (Edge Preserving Optimized Speckle-filter), is based upon the statistical properties of speckle noise. The knowledge of speckle variance allows the distinction of homogeneous areas from those, containing edges or single scattering targets. This discrimination method is used within a variable sized filter matrix to choose a region, which is suitable for calculating an intensity average, that is typical for the center pixel. Also a method for estimating speckle noise parameters is presented

Keywords

geophysical signal processing; geophysical techniques; image processing; image segmentation; radar applications; radar imaging; remote sensing by radar; spaceborne radar; speckle; synthetic aperture radar; EPOS; Edge Preserving Optimized Speckle-filter; SAR image; SAR imaging; discrimination method; geophysical measurement technique; image processing; image region analysis; land surface terrain mapping; radar imagery; remote sensing; speckle filtering; speckle noise; speckle variance; statistical properties; synthetic aperture radar; variable sized filter matrix; Filtering; Filters; Gaussian distribution; Optimization methods; Radar detection; Radar imaging; Radar scattering; Spatial resolution; Speckle; Statistics;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1994. IGARSS '94. Surface and Atmospheric Remote Sensing: Technologies, Data Analysis and Interpretation., International

Conference_Location

Pasadena, CA

Print_ISBN

0-7803-1497-2

Type

conf

DOI

10.1109/IGARSS.1994.399674

Filename

399674