Abstract:

The vehicle detection and positioning of the road ahead is very important in the vehicle anticollision warning system. To achieve accurate positing of vehicle, and contribute to subsequent vehicle distance measurement, the primary vehicle detection was done by using the existing visual vehicle detection method (AdaBoost and aggregate channel feature). Then, filtering false positive results by using vehicle geometry constraints. At last, the vehicle accurate positioning based on the rear feature of the vehicle (the rear shadow and the rear wheel) in the area-of-interest. Compared to the positioning method without geometric constraint, the proposed method reduces the false detection rate of the vehicle by 2.28%, and the mean error of the vehicle location is reduced by 44.58%. Experimental results show that the method can effectively solve the problem of low vehicle position accuracy of traditional vehicle detection method.

Key words: automobile safety, anti-collision warning system, accurate positioning, visual vehicle detection, geometry constraints, the rear feature of the vehicle, aggregate channel feature