自然场景中道路交通标志形状的检测与校正

摘要

道路交通标志的自动识别可以应用于车辆的自动或半自动辅助驾驶系统中,为车辆驾驶提供对周围环境的理解.道路情况的复杂性使得交通标志的背景很复杂,加之光照条件的变化以及车辆运行过程中的抖动等,这些都会导致交通标志失真及变形. 本文提出一种快速有效的交通标志形状检测及校正算法,先结合颜色和形状信息,有效定位道路标志位置,然后再利用透视变换校正道路标志. 实验结果表明,该方法对光照具有很好的鲁棒性,而且能很好地处理相机拍摄角度引起道路标志在图像中的形变问题.%The automatic recognition of traffic signs can be applied to the automatic or semi-automatic auxiliary driving system which can provide the information of surrounding road conditions to the driver .The traffic signs always suffer distortion and de-formation problem because of the complexity of road conditions , the changing illumination conditions and the vibrating of car .In this paper , a fast and efficient algorithm is proposed which can locate the position of traffic signs based on the color and shape in -formation , and the traffic signs can be corrected using perspective transformation .Experiment results show that the algorithm is of a good robustness to illumination , and can overcome the distortion problem caused by the unsuitable camera angle .