Peripheral oxygen saturation (SpO2) monitoring is critical during surgery and in intensive care units (ICS). Over the last decades, several studies have addressed the noncontact monitoring of vital signs, but few reports have focused on SpO2. This paper presents an SpO2 monitoring method without physical contact with the patient using imaging photoplethysmography (iPPG). Eulerian video magnification (EVM) was employed in the proposed solution to amplify the changes in skin color due to the heart cycle. The developed software operates on a widely available, low-cost hardware platform. Experiments were performed with nine healthy individuals. When comparing the experimental SpO2 results to those obtained with a reference pulse oximeter, the proposed solution showed good accuracy, with differences of less than 2%.

中文翻译：

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使用欧拉视频放大 (EVM) 进行非接触式 SpO2 测量

外周血氧饱和度 (SpO2) 监测在手术和重症监护病房 (ICS) 中至关重要。在过去的几十年里，一些研究已经解决了生命体征的非接触式监测，但很少有报告关注 SpO2。本文介绍了一种 SpO2 监测方法，无需使用成像光电容积描记 (iPPG) 与患者进行身体接触。在提议的解决方案中采用欧拉视频放大 (EVM) 来放大由于心跳周期引起的肤色变化。开发的软件在广泛可用的低成本硬件平台上运行。对九个健康个体进行了实验。将实验 SpO2 结果与使用参考脉搏血氧仪获得的结果进行比较时，建议的解决方案显示出良好的准确性，差异小于 2%。