| Landmine Detection Research Leads to Development of SASI & Real-Time System Over 18 years of landmine detection collaboration with the Threat Detection Group of Defence R&D Canada (DRDC) has led to significant hyperspectral imaging developments at ITRES. The latest of these include the development of the hyperspectral SASI (Shortwave Airborne Spectrographic Imager), and a realtime processing and analysis system. The SASI is a calibrated 100 channel imager sensitive to spectral wavelengths between 950 and 2450 nm. Using a HgCdTe array extends this sensor’s spectral coverage past 1700 nm (the typical spectral cut-off of InGaAs arrays). This part of the SWIR spectrum brings additional discrimination power for identifying surfaces in urban environments. The development of a real-time mine detection system using VNIR wavelengths measured by the CASI (Compact Airborne Spectrographic Imager) was followed by successful proof-ofconcept tests conducted in 2000. A commercial offshoot of this work saw the 2005 release of the Real-Time Processing System (RTPS). Target Detection Capability Demonstrated Using the SASI The images seen below were part of a successful investigation into the use of SWIR wavelengths to quickly identify such disparate materials as acrylics, nylon, plastics, paints, and human skin. To this end, two persons were imaged alongside an assemblage of landmines, surrogates, and unexploded ordnance (seen along the right side of the images). SASI - Acrylic & Nylon Detection SASI - Human Skin Detection (click for larger image) (click for larger image)   Some items of note:
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