A Multi-Channel Ratio-of-Ratios Method for Noncontact Hand Video Based SpO${}_2$ Monitoring Using Smartphone Cameras

Xin Tian, Chau-Wai Wong, Sushant M. Ranadive +1

Blood oxygen saturation (SpO${}_2$) is an important indicator for pulmonary and respiratory functionalities. Clinical findings on COVID-19 show that many patients had dangerously low…