这个程序可以实现车牌照定位，用牌照内垂直边缘密度恒定的特性，采用分块技术，有效地克服了由牌照尺寸变化造成定位率下降的问题。-this procedure can be achieved car licenses positioning, with vertical edge license constant density characteristics, use blocking technology to effectively overcome by the size of the lic