Sprayed or soaked concealed drug detection using SWIR hyperspectral imaging

Jihang Wang; Evan Krieger; Lucas Zbur; Joanne Gilligan; Rick Beideman; Jeffrey Beckstead; Oksana Klueva; Maria Conner; Erica Maney; Patrick Treado

doi:10.1117/12.2556903

24 April 2020 Sprayed or soaked concealed drug detection using SWIR hyperspectral imaging

Jihang Wang, Evan Krieger, Lucas Zbur, Joanne Gilligan, Rick Beideman, Jeffrey Beckstead, Oksana Klueva, Maria Conner, Erica Maney, Patrick Treado

Author Affiliations +

Proceedings Volume 11392, Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imagery XXVI; 113920O (2020) https://doi.org/10.1117/12.2556903
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

The smuggling of drug into correctional facilities through the mail is a major concern. ChemImage has developed the VeroVision^TM mail screener system, which highlights drugs from background based on score imagery computed from selected wavelengths based on the chemical signatures. More recently, sophisticated techniques to hide drugs by dissolution into paper are being used. We introduce a combined heterogeneous anomaly detection with a deep learning classifier. Anomaly detection initially extracts suspect stain patterns. A You Only Look Once (YOLO) based classifier then classifies anomalies as drug or non-drug stain patterns. We report its first successful detection on a limited set of meth samples, with 87.4% probability of detection (PD) and 7.0% probability of false alarm (PFA). The results show that widefield, multispectral short-field infrared (SWIR) imaging can allow for dissolved concealed drug screening of mail which has benefits for mail inspection efficiency and accuracy.

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Jihang Wang, Evan Krieger, Lucas Zbur, Joanne Gilligan, Rick Beideman, Jeffrey Beckstead, Oksana Klueva, Maria Conner, Erica Maney, and Patrick Treado "Sprayed or soaked concealed drug detection using SWIR hyperspectral imaging", Proc. SPIE 11392, Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imagery XXVI, 113920O (24 April 2020); https://doi.org/10.1117/12.2556903

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