Research on measuring respiratory rate and volume using Thermal cameras

The purpose of this study is to measure human respiration non-contactly using a FLIR thermal camera. We measured respiration using the temperature change of gases in the air during exhalation. For 15 subjects, breathing was filmed from the side view of the face using a thermal camera, and filming was conducted for 1 minute when the subjects were able to breathe comfortably. As a result of experiments using the respiration measurement design method proposed in this study, the amount of color change due to gas movement in each pixel during exhalation was proportional to the amount of temperature change in the air. We were able to successfully measure breathing patterns, such as a certain amount of quantitative breathing volume and number of breaths, through color change.