The Use of Gamma-Ray Imaging to Improve Portal Monitor Performance
| Autor: | James S. Goddard, Lorenzo Fabris, M. Cunningham, Frezghi Habte, J. Collins, Timothy F. Gee, Thomas P. Karnowski, Klaus P. Ziock |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Physics
Nuclear and High Energy Physics Pixel Computer science business.industry Astrophysics::High Energy Astrophysical Phenomena Track (disk drive) ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Field of view Tracking (particle physics) Target acquisition Radiation Portal Monitor Signature (logic) Optics Software Nuclear Energy and Engineering Code (cryptography) Computer vision Artificial intelligence Electrical and Electronic Engineering business ComputingMethodologies_COMPUTERGRAPHICS |
| Zdroj: | IEEE Transactions on Nuclear Science. 55:3654-3664 |
| ISSN: | 0018-9499 |
| DOI: | 10.1109/tns.2008.2007489 |
| Popis: | We have constructed a prototype, rapid-deployment portal monitor that uses visible-light and gamma-ray imaging to allow simultaneous monitoring of multiple lanes of traffic from the side of a roadway. Our Roadside Tracker uses automated target acquisition and tracking (TAT) software to identify and track vehicles in visible light images. The field of view of the visible camera overlaps with and is calibrated to that of a one-dimensional gamma-ray imager. The TAT code passes information on when vehicles enter and exit the system field of view and when they cross gamma-ray pixel boundaries. Based on this information, the gamma-ray imager ldquoharvestsrdquo the gamma-ray data specific to each vehicle, integrating its radiation signature for the entire time that it is in the field of view. In this fashion we are able to generate vehicle-specific radiation signatures and avoid source confusion problems that plague nonimaging approaches to the same problem. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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