Abstract-Remote detection of cognitive load has many powerful applications, such as measuring stress in the workplace. Cognitive tasks have an impact on breathing and heart rate variability (HRV). We show that changes in physiological parameters during cognitive stress can be captured remotely (at a distance of 3m) using a digital camera. A study (n=10) was conducted with participants at rest and under cognitive stress. A novel five band digital camera was used to capture videos of the face of the participant. Significantly higher normalized low frequency HRV components and breathing rates were measured in the stress condition when compared to the rest condition. Heart rates were not significantly different between the two conditions. We built a person-independent classifier to predict cognitive stress based on the remotely detected physiological parameters (heart rate, breathing rate and heart rate variability). The accuracy of the model was 85% (35% greater than chance).
In this regard, there are systems that rely on a single sensor such as REF , in which the authors detect stress remotely (up to a distance of 3 meters) using a five band digital camera that allows for the extraction of heart rate, breathing rate and heart rate variability.
Remote measurement of cognitive stress via heart rate variability
2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Computer Science Medicine