摘要
汽车牌照的自动定位是智能交通系统中的重要组成部分之一,是实现车牌识别(LPR)系统的关键。针对不同背景和光照条件下的车辆图像,提出了一种基于灰度图像灰度变化特征进行车牌定位的方法。依据车牌中字符的灰度变化以峰、谷规律分布确定车牌上下边界,对扫描行采用灰度跳变法确定车牌左右边界。测试结果表明,该方法是可行的。
The automated license plate location is an important part in the intelligent traffic system. It is the key step in the Vehicle License Plate Recognition（LPR）. A method for the recognition of images of different backgrounds and different illumi nations is proposed in the paper, the upper and lower borders are determined through the gray variation regulation of the char acter distribution. The left and right borders are determined through the black - white variation of the pixels in every row. Testing results show that the presented method is feasible.
出处
《现代电子技术》
2008年第2期137-139,共3页
Modern Electronics Technique
关键词
车牌定位
灰度图像
灰度变化
智能交通
license plate locating
gray image
gray variation
intelligent traffic
