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Polarimetric synthetic aperture radar signature detector

  • US 8,125,370 B1
  • Filed: 03/31/2008
  • Issued: 02/28/2012
  • Est. Priority Date: 04/16/2007
  • Status: Expired due to Fees
First Claim
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1. A system for processing an acquired polarimetric synthetic aperture radar (SAR) image of a region to identify a candidate pixel that correlates to a target representation, said polarimetric SAR image having a plurality of pixels, said candidate pixel corresponding to a position in said region that contains a candidate object, the system comprising:

  • a sub-aperture processor configured to extract an N plurality of sub-apertures from the polarimetric SAR image;

    a polarimetric decomposition processor configured to deconstruct a J plurality of parameter components from each sub-aperture of said N plurality of sub-apertures;

    a log-likelihood processor configured to identify the candidate pixel by generating a log-likelihood value from said J plurality of parameter components by;

    obtaining an acquired value for said sub-aperture from at least one parameter component of said J plurality of parameter components;

    acquiring a reference value that characterizes said parameter component for the target representation;

    determining a distance value between said reference value and said acquired value;

    combining said distance value for said each sub-aperture of said N plurality of sub-apertures together to obtain said log-likelihood value; and

    log-likelihood value against a classification criterion to determine whether the candidate pixel conforms to the target representative.

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