An algorithm for automatic vehicle speed detection using video camera

This paper presents a new method based on digital image processing to realize the real-time automatic vehicle speed monitoring using video camera. Based on geometric optics, it first presents a simplified method to accurately map the coordinates in image domain into real-world domain. The second part is focused on the vehicle detection in digital image frames in video stream. Experiment shows it requires only a single digital video camera and an onboard computer and can simultaneously monitor vehicle speeds in multiple lanes. The detected vehicle speed's average error is below 4%.