基于区域最大有效信息量的牌照定位新方法

汽车牌照定位的效果直接影响车牌识别系统的工作性能。为了提高定位的准确性,在对现有牌照定位算法的研究和分析的基础上,结合实际工程实例,提出了一种基于区域最大有效信息量的车牌定位新方法,该算法提取图像的垂直信息,通过阈值判断准确定位车牌区域。并使用在不同光照情况下,不同种类车牌图像对该算法进行实验。实验结果表明,该新方法不仅具有良好的定位能力,而且定位速度快,定位准确率高。

A New Algorithm for License Plate Location Based on Maximum Effective Information in Region

License plate location is the key segment for license plate recognition system, the performance of recognition system dependence on the orientation effect directly. The location algorithm is difference in different environment. A new method for license plate location is given uses maximum effective information in region, based on the research and analysis on existing license plate orientation algorithm and engineering case; the experiment of difference kinds license plate use this algorithm is also given, under difference illumination. The results show this new method has several good characteristics: well orientation ability, high orientation speed, and high accuracy rate.