一种车牌号码图像二值化的新方法。利用数学形态学的开运算消除图像光照不均匀影响，根据欧几里得距离确定图像阈值。-Of a license plate number of the new image binarization method. Using mathematical morphology opening operation to eliminate uneven lighting image effects, according to Euclidean distance to determine the image threshold.