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Optica, Biomedical Optics Express, 9(6), p. 3320, 2015

DOI: 10.1364/boe.6.003320

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Non-contact measurement of oxygen saturation with an RGB camera

Journal article published in 2015 by Alessandro R. Guazzi, Mauricio Villarroel, João Jorge, Jonathan Daly, Matthew C. Frise ORCID, Peter A. Robbins, Lionel Tarassenko
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

A novel method (Sophia) is presented to track oxygen saturation changes in a controlled environment using an RGB camera placed approximately 1.5 m away from the subject. The method is evaluated on five healthy volunteers (Fitzpatrick skin phenotypes II, III, and IV) whose oxygen saturations were varied between 80% and 100% in a purpose-built chamber over 40 minutes each. The method carefully selects regions of interest (ROI) in the camera image by calculating signal-to-noise ratios for each ROI. This allows it to track changes in oxygen saturation accurately with respect to a conventional pulse oximeter (median coefficient of determination, 0.85).