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24 September 2009 Remote sensing of stress using electro-optics imaging technique
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Emotional or physical stresses induce a surge of adrenaline in the blood stream under the command of the sympathetic nerve system, which, cannot be suppressed by training. The onset of this alleviated level of adrenaline triggers a number of physiological chain reactions in the body, such as dilation of pupil and an increased feed of blood to muscles etc. This paper reports for the first time how Electro-Optics (EO) technologies such as hyperspectral [1,2] and thermal imaging[3] methods can be used for the detection of stress remotely. Preliminary result using hyperspectral imaging technique has shown a positive identification of stress through an elevation of haemoglobin oxygenation saturation level in the facial region, and the effect is seen more prominently for the physical stressor than the emotional one. However, all results presented so far in this work have been interpreted together with the base line information as the reference point, and that really has limited the overall usefulness of the developing technology. The present result has highlighted this drawback and it prompts for the need of a quantitative assessment of the oxygenation saturation and to correlate it directly with the stress level as the top priority of the next stage of research.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tong Chen, Peter Yuen, Kan Hong, Aristeidis Tsitiridis, Firmin Kam, James Jackman, David James, Mark Richardson, William Oxford, Jonathan Piper, Francis Thomas, and Stafford Lightman "Remote sensing of stress using electro-optics imaging technique", Proc. SPIE 7486, Optics and Photonics for Counterterrorism and Crime Fighting V, 748606 (24 September 2009);

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