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5 May 2009 Long-wave infrared profile feature extractor (PFx) sensor
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The Long Wave Infrared (LWIR) Profile Feature Extractor (PFx) sensor has evolved from the initial profiling sensor that was developed by the University of Memphis (Near IR) and the Army Research Laboratory (visible). This paper presents the initial signatures of the LWIR PFx for human with and without backpacks, human with animal (dog), and a number of other animals. The current version of the LWIR PFx sensor is a diverging optical tripwire sensor. The LWIR PFx signatures are compared to the signatures of the Profile Sensor in the visible and Near IR spectral regions. The LWIR PFx signatures were collected with two different un-cooled micro bolometer focal plane array cameras, where the individual pixels were used as stand alone detectors (a non imaging sensor). This approach results in a completely passive, much lower bandwidth, much longer battery life, low weight, small volume sensor that provides sufficient information to classify objects into human Vs non human categories with a 98.5% accuracy.
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Ronald B. Sartain, Keith Aliberti, Troy Alexander, and David Chiu "Long-wave infrared profile feature extractor (PFx) sensor", Proc. SPIE 7333, Unattended Ground, Sea, and Air Sensor Technologies and Applications XI, 733311 (5 May 2009);

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