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 license change positioning rate falling.