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Proceedings Paper

Sparse model inversion and processing of spatial frequency-domain electromagnetic induction sensor array data for improved landmine discrimination
Author(s): Stacy L. Tantum; Kenneth A. Colwell; Waymond R. Scott Jr.; Peter A. Torrione; Leslie M. Collins; Kenneth D. Morton Jr.
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Paper Abstract

Frequency-domain electromagnetic induction (EMI) sensors have been shown to provide target signatures which enable discrimination of landmines from harmless clutter. In particular, frequency-domain EMI sensors are well-suited for target characterization by inverting a physics-based signal model. In many model-based signal processing paradigms, the target signatures can be decomposed into a weighted sum of parameterized basis functions, where the basis functions are intrinsic to the target under consideration and the associated weights are a function of the target sensor orientation. When sensor array data is available, the spatial diversity of the measured signals may provide more information for estimating the basis function parameters. After model inversion, the basis function parameters can form the foundation of model-based classification of the target as landmine or clutter. In this work, sparse model inversion of spatial frequency-domain EMI sensor array data followed by target classification using a statistical model is investigated. Results for data measured with a prototype frequency-domain EMI sensor at a standardized test site are presented. Preliminary results indicate that extracting physics-based features from spatial frequency-domain EMI sensor array data followed by statistical classification provides an effective approach for classifying targets as landmine or clutter.

Paper Details

Date Published: 7 June 2013
PDF: 8 pages
Proc. SPIE 8709, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XVIII, 87091E (7 June 2013); doi: 10.1117/12.2016063
Show Author Affiliations
Stacy L. Tantum, Duke Univ. (United States)
Kenneth A. Colwell, Duke Univ. (United States)
Waymond R. Scott Jr., Georgia Institute of Technology (United States)
Peter A. Torrione, Duke Univ. (United States)
Leslie M. Collins, Duke Univ. (United States)
Kenneth D. Morton Jr., Duke Univ. (United States)

Published in SPIE Proceedings Vol. 8709:
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XVIII
J. Thomas Broach; Jason C. Isaacs, Editor(s)

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