路标识别，模式识别大作业，主程序；检测彩色路标，直方图均衡化，提取圆形路标，增强提取目标，二值化,提取路标中的指示图，中值滤波，平滑滤波，图像边框处理，链码生成及识别(Road sign recognition, pattern recognition, big operation, main program, detection of color roadmap, histogram equalization, extraction of circular road signs, enhancement of extraction target, two value, extraction of signposts in road signs, median filtering, smoothing filtering, image border processing, chain code generation and recognition.)