TAD[sup]2[/sup]: the first truly non-intrusive lie detection system deployed in real crime cases

Sarun Sumriddetchkajorn; Armote Somboonkaew

doi:10.1117/12.870166

4 November 2010 TAD²: the first truly non-intrusive lie detection system deployed in real crime cases

Sarun Sumriddetchkajorn, Armote Somboonkaew

Proceedings Volume 7854, Infrared, Millimeter Wave, and Terahertz Technologies; 78540Z (2010) https://doi.org/10.1117/12.870166
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

Interrogation is an important step for seeking truth from the suspect. With the limit of the intrusive nature of the current polygraph, we show here a highly-sought-after non-intrusive lie detection system with a user-friendly interface called TAD². The key idea behind our TAD² is based on the analysis of far-infrared data obtained remotely from the periorbital and nostril areas of the suspect during the interrogation. In this way, measured change in skin temperature around two periorbital areas is converted to a relative blood flow velocity while a respiration pattern is simultaneously determined from the measured change in temperature around the nostril region. In addition, TAD² is embedded with our automatic baseline assignment that is used for distinguishing the subject's response into normal or abnormal stage. In our TAD², the officer can choose to perform one of the three standard lie detection tests, namely, a modified zone comparison test, a modified general question test, and an irrelevant & relevant test. Field test results from suspects in real crime cases are discussed.

Citation Download Citation

Sarun Sumriddetchkajorn and Armote Somboonkaew "TAD²: the first truly non-intrusive lie detection system deployed in real crime cases", Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78540Z (4 November 2010); https://doi.org/10.1117/12.870166

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