A study on the embedded system using the RGB camera and thermal camera for the stress monitoring

• Published in: Transactions of Japanese Society for Medical and Biological Engineering Vol. Annual58; no. Abstract; p. 428
• Main Authors: Kihara, Hiromu, Ishizaki, Shota, Nakano, Ryosuke, Ikejiri, Koki, Koga, Honoka, Yanagi, Ryuya, Lee, Jihyoung
• Format: Journal Article
• Language: Japanese
• Published: Japanese Society for Medical and Biological Engineering 2020; 公益社団法人 日本生体医工学会
• ISSN: 1347-443X; 1881-4379
• DOI: 10.11239/jsmbe.Annual58.428

The aim of this study is to examine the variability of the pulse rate (PR) derived from imaging photoplethysmogram (iPPG) and the face skin temperature using the developed prototype system with a built-in RGB and thermal camera module during cold pressure task (10 °C). PR was detected from the peak frequency of iPPG, which is produced by the variability of green component of 30 Hz sampled RGB image on the forehead area. Nose area temperature was calculated as the average of 50 pixels among the face thermal image. The results in 5 subjects showed that mean blood pressure and PR were increased 5.22 mmHg and 6.44 bpm. The nose skin temperature was decreased 0.95 °C. The standard error of each indices were 1.80 mmHg, 2.42 bpm, 0.29 °C, respectively. In conclusion, these findings suggest that the developed prototype system might be practical measurement for stress monitoring.