Pedestrian hurdle behavior alarm method and device based on video recognition

The invention discloses a pedestrian hurdle behavior alarm method and device based on video recognition. The method comprises the steps of collecting a plurality of frames of continuous video images, and generating a preprocessing image; cutting the preprocessed image, transmitting the image to an SSD algorithm module, extracting and identifying the motion features of a moving target, and classifying and concluding the motion features of a pedestrian from the motion features; tracking the moving trajectory of the pedestrian, establishing a motion speed model of inter-frame image pixel motion, and calculating the distance from the current pedestrian to a central isolation fence; judging whether the currently calculated distance between the pedestrian and the central isolation fence is greater than an alarm distance, if the calculated distance is less than or equal to the alarm distance, giving an alarm and performing the next step, and if the calculated distance is greater than the alarm distance, not performi