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Published on: February 12, 2014

Robust through-the-wall radar image classification using a target-model alignment procedure.

Graeme E Smith1, Bijan G Mobasseri

  • 1Villanova University, Villanova, PA 19085, USA. graeme.smith@villanova.edu

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|September 8, 2011
PubMed
Summary

Automated classification of through-the-wall radar images (TWRI) is improved by aligning target images using the system point spread function (PSF). This technique achieves high accuracy for identifying stationary targets behind walls.

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Area of Science:

  • Radar imaging and signal processing
  • Machine learning for target recognition
  • Advanced sensor data interpretation

Background:

  • Through-the-wall radar images (TWRI) are challenging to interpret due to their dissimilarity to optical images.
  • Automated target classification is crucial for extracting intelligence from TWRI and supporting human operators.
  • Target location significantly impacts image characteristics, potentially causing classifier failure.

Purpose of the Study:

  • To develop and validate a technique for classifying stationary targets in 3-D TWRIs.
  • To address the challenge of target location dependence in TWRI classification.
  • To improve the accuracy and reliability of automated target recognition in through-the-wall scenarios.

Main Methods:

  • Extraction of high-range resolution profiles (HRRP) from 3-D TWRIs.

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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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Published on: February 12, 2014

  • Development of a target image alignment technique using deconvolution with the system point spread function (PSF).
  • Classification of aligned HRRPs using a naive Bayesian classifier enhanced with principal component analysis.

    • Main Results:

    • The proposed alignment technique reduced normalized mean squared error (NMSE) to ≤ 9% compared to measured images.
    • The naive Bayesian classifier achieved correct classification rates of ≥ 97% for canonical targets behind a concrete wall.
    • Demonstrated the effectiveness of image alignment in overcoming target location dependency.

    Conclusions:

    • Automated classification of stationary targets in TWRI is feasible and highly accurate with the proposed alignment method.
    • The PSF-based alignment technique effectively mitigates location-dependent variations in radar images.
    • This approach significantly enhances the utility of TWRI for intelligence gathering and surveillance applications.