Imaging and detection of object under obscuring layers
(sponsored by ONR)
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Summary
Millimeter (MMW)
and terahertz wave propagation and imaging through obscuring layers have
recently gained tremendous interest with practical applications ranging
from security, inspection, and surveillance to biological imaging. Both
millimeter and terahertz waves show promise in detecting and imaging
objects under obscuring material. One important and practical scenario
is detection of hidden objects underneath normal clothing from a standoff position. An
electromagnetic model for this setup is necessary, including the
dielectric modeling of materials. This project investigates an
electromagnetic model based on multi-layer media. This model includes
multiple reflections within each layer, and it has the flexibility to
include more complicated structures. This model provides a tool to
estimate responses at different frequencies and configurations, a tool which
is instrumental to imaging and detection of objects.
Multi-layer model geometry
Imaging of
object under obscuring media: Left: geometry, Right: imaging results
Related publications
- A. Ishimaru, S. Jaruwatanadilok,
and Y. Kuga, "Short pulse detection and imaging of objects behind
obscuring random layers," accepted for publication in Waves in
Random and Complex Media, 2006.
- A. Ishimaru, S. Jaruwatanadilok,
and Y. Kuga, "Imaging of a target through random media using a
short-pulse focused beam," submitted for publication in IEEE
Transactions on Antennas and Propagation, 2006
- A.Ishimaru,
S. Jaruwatanadilok, and Y. Kuga, “Multiple
scattering effects on the radar cross section (RCS) of objects in a
random medium including backscattering enhancement and shower
curtain effects,” Waves in Random Media, Vol. 14,
pp.499-511, October 2004.
- Y. Kuga, A. Ishimaru, and S.
Jaruwatanadilok, "Short
pulse detection of objects behind obscuring random layers,"
IGARSS, Denver, CO, July 31- August 4, 2006.
- S. Jaruwatanadilok, Y. Kuga,
and A. Ishimaru, "An
Electromagnetic Model for Plastic Composite Materials under
Obscuring Layers," URSI - APS, Albuquerque, NM, July
9-14, 2006.
- A. Ishimaru, S. Jaruwatanadilok,
and Y. Kuga, "Imaging
and Detection of Hidden Objects behind Obscuring Random Media,"
URSI - APS, Albuquerque, NM, July 9-14, 2006.
- A. Ishimaru, S. Jaruwatanadilok,
and Y. Kuga, "Imaging and coherence in rough surface and object
scattering," Aspect of rough surface scattering and related
phenomena, Yountville, CA, June 25-28, 2006.
- A. Ishimaru, S.
Jaruwatanadilok, and Y. Kuga, "Detection and Imaging of Objects
Behind Multiple Scattering Random Obscuring Layers," Inverse
Scattering, University of North Carolina, Charlotte, NC, May
30-June 3, 2005.
Sponsored by ONR
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