These problems particularly affect the segmentation step [3], which is usually the first stage in high-level detection and recognition systems. Segmentation can be carried out using color information or structural information. Many segmentation methods have been reported in the literature since the advent of digital image processing. Detection and recognition are two major steps for determining types of traffic signs [4]. Detection refers to the task of locating the traffic signs in given images. It is common to call the region in a given image that potentially contains the image of a traffic sign the region of interests (ROI).