Measuring driver cognitive distraction through lips and eyebrows

Cognitive distraction is one of the several contributory factors in road accidents. A number of cognitive distraction detection methods have been developed. One of the most popular methods is based on physiologicalmeasurement. Head orientation, gaze rotation, blinking and pupil diameterare among popular physiological parameters that are measured for driver cognitive distraction. In this paper, lips and eyebrows are studied. These new features on human facial expression are obvious and can be easily measuredwhen a person is in cognitive distraction. There are several types of movement on lips and eyebrows that can be captured to indicate cognitive distraction. Correlation and classification techniques are used in this paper for performance measurement and comparison. Real time drivingexperiment was setup and faceAPI was installed in the car to capture driver’sfacial expression. Linear regression, support vector machine (SVM), staticBayesian network (SBN) and logistic regression (LR) are used in this study.Results showed that lips and eyebrows are strongly correlated and have a significant role in improving cognitive distraction detection. Dynamic Bayesian network (DBN) with different confidence of levels was also usedin this study to classify whether a driver is distracted or not.