...车牌图像分割；字符识别 关键字 [gap=1351]Keywords：Image preprocessing; license plate location; license plate image segmentation; character recognition ...
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The recognition of automobile license plates is the core of intelligent traffic information management system, and the key of recognition is the license plate segmentation from the complex image.
汽车牌照识别是智能交通信息管理系统的核心，从复杂的图像中分割出车牌又是牌照识别的关键。
Generally speaking, the image segmentation method adopted in vehicle license plate recognition systems at present is not efficient due to its large search space.
因搜索空间太大，现有的车牌号码识别系统所采用的图象分割方法一般说来效率较低。
The proposed method is divided into two steps: 1 license plate location by the variance of gray image, and 2 license plate segmentation by connected components analysis and projection analysis.
该系统由两个重要步骤组成：1基于灰度方差的车牌定位算法，2结合连通域分析和投影分析的字符切分算法。
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