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Citation |
Tajdini MM, Rappaport CM. IEEE Transactions on Antennas and Propagation 2022; 70(4): 2960-2968. |
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Copyright |
(Copyright © 2022) |
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DOI |
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PMID |
unavailable |
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Abstract |
In order to improve the speed of passenger screening while preserving the effective capability to detect more sophisticated threats, airport security imaging systems must be able to accurately characterize concealed body-worn objects. In addition to improving the passenger experience, this system capability will enhance airport security for the traveling public. This article presents a real-time, fully automatic algorithm for the wideband millimeter-wave (mm-wave) radar reconstruction of the nominal human body contours, even in the presence of an affixed weak dielectric object or when a portion of the body cross section is not captured by the imaging scanner. The algorithm extracts the main contours from a noisy collection of 3-D reconstructed reflectivity and approximates the nominal human body cross section via fitting a low-order angular Fourier series. This important step is essential for precise characterization of concealed body-worn explosives. A ranking algorithm is developed as a metric for the nominal body reconstruction accuracy. We verify the developed algorithm by applying it to the actual images of the high definition-advanced imaging technology (HD-AIT) system, a laboratory prototype mm-wave scanning system developed recently by the U.S. Department of Homeland Security (DHS). The reconstructed body contours may be used to estimate the electric permittivity of the concealed person-worn objects. © 1963-2012 IEEE. Language: en |
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Keywords |
Explosives; Reflection; Ground penetrating radar systems; Remote sensing; Image reconstruction; Airport security; remote sensing; Body contours; computational imaging; Computational imaging; Edge detection; Fourier-domain; Fourier-domain reconstruction; Human bodies; Image edge detection; Images reconstruction; imaging radar; Imaging systems; inverse scattering; Inverse-scattering; millimeter wave; Millimeter waves; Radar imaging; radar signal processing; Remote-sensing; Three-dimensional display; Tracking radar |