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SAR Target Analysis Based on Multiple-Sublook Decomposition: A Visual Exploration Approach

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2 Author(s)
Singh, J. ; Remote Sensing Technol. Inst. (IMF), German Aerosp. Center (DLR), Wessling, Germany ; Datcu, M.

The advent of submeter-resolution synthetic aperture radar (SAR) images from satellites such as TerraSAR-X has given a new dimension to SAR image understanding. Even though emphasis is always on discovering automatic means of target characterization, visual exploration of targets and objects is the first step in many applications. While considering the complex-valued SAR images, visual inspection of the targets in an image may provide incomplete and misleading information, as sometimes two entirely different behaving objects look quite similar in SAR images. Thus, a need was felt to develop a methodology to support visual target recognition and analysis. In this letter, we present a method which looks into the complex-valued spectrum of SAR images, thus allowing a detailed physical interpretation of the scattering behavior of objects. The presented method is a joint time-frequency analysis method based on sublook decomposition. With the presented results, we emphasize the use of complex-valued SAR images for target characterization, the use of which is primarily restricted to polarimetric and interferometric applications as of now.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:9 ,  Issue: 2 )

Date of Publication:

March 2012

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