Adaptive target recognition: a case study involving airport baggage screening

Ankit Manerikar; Tanmay Prakash; Avinash C. Kak

doi:10.1117/12.2557638

23 April 2020 Adaptive target recognition: a case study involving airport baggage screening

Ankit Manerikar, Tanmay Prakash, Avinash C. Kak

Proceedings Volume 11404, Anomaly Detection and Imaging with X-Rays (ADIX) V; 114040B (2020) https://doi.org/10.1117/12.2557638
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

This work addresses the question whether it is possible to design a computer-vision based automatic threat recognition (ATR) system so that it can adapt to changing specifications of a threat without having to create a new ATR each time. The changes in threat specifications, which may be warranted by intelligence reports and world events, are typically regarding the physical characteristics of what constitutes a threat: its material composition, its shape, its method of concealment, etc. Here we present our design of an AATR system (Adaptive ATR) that can adapt to changing specifications in materials characterization (meaning density, as measured by its x-ray attenuation coefficient), its mass, and its thickness. Our design uses a two-stage cascaded approach, in which the first stage is characterized by a high recall rate over the entire range of possibilities for the threat parameters that are allowed to change. The purpose of the second stage is to then fine-tune the performance of the overall system for the current threat specifications. The computational effort for this fine-tuning for achieving a desired PD/PFA rate is far less than what it would take to create a new classifier with the same overall performance for the new set of threat specifications.

Citation Download Citation

Ankit Manerikar, Tanmay Prakash, and Avinash C. Kak "Adaptive target recognition: a case study involving airport baggage screening", Proc. SPIE 11404, Anomaly Detection and Imaging with X-Rays (ADIX) V, 114040B (23 April 2020); https://doi.org/10.1117/12.2557638

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