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Proceedings Paper

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

Paper Details

Date Published: 4 November 2010
PDF: 9 pages
Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78540Z (4 November 2010); doi: 10.1117/12.870166
Show Author Affiliations
Sarun Sumriddetchkajorn, National Science and Technology Development Agency (Thailand)
Armote Somboonkaew, National Science and Technology Development Agency (Thailand)

Published in SPIE Proceedings Vol. 7854:
Infrared, Millimeter Wave, and Terahertz Technologies
Cunlin Zhang; Xi-Cheng Zhang; Peter H. Siegel; Li He; Sheng-Cai Shi, Editor(s)

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