Unsafe driving behavior detection and early warning method based on facial feature analysis

The invention discloses an unsafe driving behavior detection and early warning method based on facial feature analysis, and the method comprises the following steps: 1, collecting an upper body imageof a driver, and carrying out the preprocessing of the upper body image to obtain a preprocessed image; 2, detecting a face in the preprocessed image, positioning the face, and marking facial featurepoints in the face; 3, extracting feature points related to fatigue features and distraction features from the facial feature points; 4, calculating a left eye aspect ratio, a mouth aspect ratio, a head yaw angle and an eye gaze direction angle according to the feature points; 5, comparing the eye aspect ratio and the mouth aspect ratio with fatigue judgment conditions to complete fatigue state judgment, and comparing the head yaw angle and the eye gaze downward angle with distraction judgment conditions to complete distraction state judgment; and 6, if the judgment result is a fatigue state or a distracted state, send