Abstract
That vehicles travel on a curve with excessive speed tends to skid or roll over. This study presents research in video recognition technology of lane and its application in traffic early safety alert system, which improves traffic safety. In our study, we use a monocular camera to acquire the image of the road ahead. Techniques such as gray-scale transformation, filtering, edge detection and curve fitting are used for the recognition of the lane line and curve fitting. Then radius of curvature of the road ahead will be extracted and then the maximum safe speed, which is to be compared with the speed of the vehicle in safety alert system. Experiments show that this method can accurately calculate the radius of the curve ahead and timely give alert message when the vehicle’s speed exceeds safe speed.
Highlights
The bend of the road is prone sections of traffic accidents, whose high probability of accidents and severity of the accidents have been the emphasis of relevant foreign agencies Institutes
This study proposes a method that we get the radius of curvature of the curve ahead through computer vision technology
We calculated a safe speed for the vehicle using the radius of curvature ahead for alert judgment and alert system
Summary
The bend of the road is prone sections of traffic accidents, whose high probability of accidents and severity of the accidents have been the emphasis of relevant foreign agencies Institutes. Through the conversion of the image coordinate system and the world coordinate system, we can calculate the radius of the curve of the road and the maximum speed of the vehicle in real time, which is necessary for safety alert system. The basic principle of speed alert system of lane curve is that the image of the road ahead is collected first by a monocular camera mounted on the vehicle. Coordinate transformation: To calculate the radius of the lane mark on the actual road surface, the fitting-out lane line will need coordinate transformation to obtain the real information in the world coordinate system (Guo et al, 2006). According to the characteristics of the vehicle lane line, a minimum turning radius curve is needed ahead, namely the minimum radius of curvature, which can be calculated as:. According to the principle of vehicle dynamics, the maximum speed of the vehicle skidding is: vh max ugr (10)
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