Motion Blur Suppression Accommodating to Fast Radar Imaging for Walk-Through Concealed Weapon Detection

Sumiya, Tatsuya; Ogura, Kazumine; Yamanouchi, S.; Khan, Nagma S.; Ariyoshi, Masayuki; Nomura, Toshiyuki

doi:10.1109/radarconf2043947.2020.9266439

Cited by 3 publications

(1 citation statement)

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“…This shift causes motion blur in the reconstructed radar images and deteriorates the image quality. However, in [24] it was shown that this issue can be compensated by separating the measured data into smaller data segments and shifting the antenna positions with respect to the detected target velocity. With this technique, an effective and fast motion blur suppression was applied to simulated and real measured data.…”

Section: Polarimetry Results For Security Scenariosmentioning

confidence: 99%

Improved Threat Detection in Walk-Through Security Scanning Using an Optimized Polarimetric Target Decomposition Method

Root¹,

Adametz²,

Gumbmann

et al. 2023

IEEE J. Microw.

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Reliable and convenient walk-through security scanning, which doesn't separate people or impede their movement, is an extremely challenging task. In this paper, a novel approach for a security check with an overhead observation and a polarimetric target decomposition is presented. The viewing angle of the scanner equals a side-looking airborne radar. However, it will be shown that the established polarimetric target decomposition methods of remote-sensing are not well suited for close-range radar imaging and need to be adapted due to the differences in the geometry of the imaging scenario. The usage of a multiple input and multiple output (MIMO) array and the shorter distance between array and target need a changed decomposition technique in order to distinguish between persons with or without worn threat objects. The differences between radar remote-sensing and close-range imaging scenarios are investigated. An optimized version of the Sato four-component polarimetric scattering decomposition is derived. The proposed close-range adjustment is applied to the model and investigated experimentally with a 4-to-12 GHz fully polarimetric MIMO imaging system. Polarimetric decomposition is carried out on defined test structures with known scattering mechanisms, as well as on mannequins and persons with different threat objects like guns or explosives. In test campaigns, promising results were achieved for a correct target decomposition in radar-based walk-through security scanning.

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Section: Polarimetry Results For Security Scenariosmentioning

confidence: 99%