The traffic sign recognition system, an intelligent vision system for recognizing the traffic signs, becomes important in an autonomous vehicle. It will provide information of the road signs on the way and guide the vehicle when running in the street. In driver assistance systems, it helps the driver to recognize the road signs early and accurately. A false recognition of the traffic signs caused by the human factors could be avoided. Thus, the traffic sign recognition system makes the driving safer and easier.
In the outdoor environment, due to the illumination changes, rotation, shadows, and partial occlusion of the images, the traffic sign recognition becomes a challenging task. Furthermore, a fast algorithm is needed to operate in the real time environment. Generally, the traffic sign recognition system is divided into two stages: the detection stage, which finds the region of interest containing the traffic signs from an image, and the classification stage where the detected signs are classified into one of the road signs.
Source : A. Soetedjo, K. Yamada"Fast and Robust Traffic Sign Detection",2005 IEEE International Conference on Systems, Man and Cybernetics, Hawaii, October 2005