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Trace detection of explosive substances in hyperspectral imagery

: Jarvis, J.P.; Fuchs, F.; Hugger, S.; Blattmann, V.; Yang, Q.; Ostendorf, R.; Bronner, W.; Driad, R.; Aidam, R.; Wagner, J.; Beyerer, Jürgen

Thoma, K. (Ed.); Häring, I. (Ed.); Leismann, T. (Ed.) ; Fraunhofer-Institut für Kurzzeitdynamik, Ernst-Mach-Institut -EMI-, Freiburg/Brsg.:
9th Future Security 2014. Security Research Conference : September 16 – 18, 2014, Berlin; Proceedings
Stuttgart: Fraunhofer Verlag, 2014
ISBN: 978-3-8396-0778-7
ISBN: 3-8396-0778-7
Security Research Conference "Future Security" <9, 2014, Berlin>
Conference Paper
Fraunhofer IAF ()
Fraunhofer IOSB ()
stand-off detection; remote sensing; hyperspectral target detection; quantum cascade laser; infrared spectroscopy

In this work, we present a remote sensing system based on active infrared laser illumination for detection of explosive substances. The spectroscopy system comprises two tunable quantum cascade laser sources covering a total tuning range of 300 cm (-1) from 7.7 µm to 10 µm. A high performance mercury-cadmium-telluride infrared camera is used to collect the diffusely backscattered light. The resulting measurement data forms a hyperspectral image, where each pixel vector contains the bachscattering spectrum of a specific location in the scene. The image spectra are tested for contamination with target spectra including PETN, RDX, TNT and ammonium nitrate using the well-known adaptive matched subspace algorithm.