在车牌粗定位的基础上,对分割出的车牌图像进行二值化,对二值车牌图像进行逐行扫描,利用每一行像素的黑、白跳变规律确定车牌的上下边界 对二值车牌图像进行处理得到特征图像,通过对特征图像进行垂直投影确定车牌左右边界.测试结果表明,该方法精确定位的准确率达到99 .

-In the rough location based on the license plate on the partition plate out of the image binarization, the value of license plate images of the two progressive scan, using each row of pixels black and white license plates transition rules to determine the upper and lower boundaries　pairs of binary image processing to be features of license plate images, features images by the vertical projection of around license plates to determine the boundary. test results show that the method pinpoint accuracy rate of 99 .