Traffic Flow Measuring System Using Image Processing

In this paper, we show anew image sensor for measuring traffic flow. The image sensor is set at an intersection. The image sensor measures traffic flow by vehicle tracking. The tracking is done by gray level pattern matching. Gray level pattern matching is suitable for outdoor use since it is robust against change of scene brightness. Then we provide the hardware for high speed gray level pattern matching. After showing our new method for measuring traffic flow by the image sensor, we measure traff~c flow at an actual intersection and describe the results. The sensor measures traffic flow accurately under various conditions.