A non-contact imaging method with a digital RGB camera is proposed to evaluate plethysmogram and spontaneous lowfrequency oscillation. In vivo experiments with human skin during mental stress induced by the Stroop color-word test demonstrated the feasibility of the method to evaluate the activities of autonomic nervous systems.
Izumi Nishidate, Akira Hoshi, Yuta Aoki, Kazuya Nakano, Kyuichi Niizeki, and Yoshihisa Aizu, "Noncontact imaging of plethysmographic pulsation and spontaneous low-frequency oscillation in skin perfusion with a digital red-green-blue camera," Proc. SPIE 9707, Dynamics and Fluctuations in Biomedical Photonics XIII, 97070L (Presented at SPIE BiOS: February 15, 2016; Published: 17 March 2016); https://doi.org/10.1117/12.2212558.
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