A digital signal analysis system for vigilance studies is presented. The analysis is based on adaptive segmentation, band pass filtering, nonlinear eye movement detection and rule-based decision making. A preliminary evaluation of seven subjects falling asleep showed that the system is able to detect small vigilance fluctuations reliably.
Värri, A., Hirvonen, K., Hasan, J., Loula, P., & Häkkinen, V. (1992). A computerized analysis system for vigilance studies. Computer Methods and Programs in Biomedicine, 39(1-2), 113-124. https://doi.org/10.1016/0169-2607(92)90064-E