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Proceedings Paper

Combined illumination cylindrical millimeter-wave imaging technique for concealed weapon detection
Author(s): David M. Sheen; Douglas L. McMakin; Thomas E. Hall
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Paper Abstract

A novel millimeter-wave imaging technique has been developed for personnel surveillance applications, including the detection of concealed weapons, explosives, drugs, and other contraband material. Millimeter-waves are high-frequency radio waves in the frequency band of 30 - 300 GHz, and pose no health threat to humans at moderate power levels. These waves readily penetrate common clothing materials, and are reflected by the human body and by concealed items. The combined illumination cylindrical imaging concept consists of a vertical, high-resolution, millimeter-wave array of antennas which is scanned in a cylindrical manner about the person under surveillance. Using a computer, the data from this scan is mathematically reconstructed into a series of focused 3D images of the person. After reconstruction, the images are combined into a single high-resolution 3D image of the person under surveillance. This combined image is then rendered using 3D computer graphics techniques. The combined cylindrical illumination is critical as it allows the display of information from all angles. This is necessary because millimeter-waves do not penetrate the body. Ultimately, the images displayed to the operate will be icon-based to protect the privacy of the person being screened. Novel aspects of this technique include the cylindrical scanning concept and the image reconstruction algorithm, which was developed specifically for this imaging system. An engineering prototype based on this cylindrical imaging technique has been fabricated and tested. This work has been sponsored by the Federal Aviation Administration.

Paper Details

Date Published: 20 July 2000
PDF: 9 pages
Proc. SPIE 4032, Passive Millimeter-Wave Imaging Technology IV, (20 July 2000); doi: 10.1117/12.391820
Show Author Affiliations
David M. Sheen, Pacific Northwest National Lab. (United States)
Douglas L. McMakin, Pacific Northwest National Lab. (United States)
Thomas E. Hall, Pacific Northwest National Lab. (United States)

Published in SPIE Proceedings Vol. 4032:
Passive Millimeter-Wave Imaging Technology IV
Roger M. Smith; Roger Appleby, Editor(s)

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