arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.6705cs.CV
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一种提高车牌字符识别准确率的鲁棒有效方法

A Robust and Efficient Method for Improving Accuracy of License Plate Characters Recognition

Reza Azad, Hamid Reza Shayegh, Hamed Amiri

摘要:

车牌识别技术在交通监控和停车管理中起着重要的作用。提出了一种基于K近邻(K-NN)分类器的车牌字符识别方法。该系统首先对提取的字符进行轮廓化处理,然后提取字符的角度和距离特征信息,最后利用K-NN分类器进行字符识别。根据字符位图上点的分布,计算出字符的角度和距离特征。在K-NN方法中,计算测试点和参考点之间的欧氏距离,以找到k-最近邻。我们在包含1200个样本的可用数据集上评估了我们的方法。使用70%的样本进行训练,在整个样本上测试我们的方法,获得了99%的正确识别率。此外,我们在1200个数据集上使用三/策略验证技术,平均达到99.41%的准确率。

英文摘要:

License Plate Recognition (LPR) plays an important role on the traffic monitoring and parking management. A robust and efficient method for enhancing accuracy of license plate characters recognition based on K Nearest Neighbours (K-NN) classifier is presented in this paper. The system first prepares a contour form of the extracted character, then the angle and distance feature information about the character is extracted and finally K-NN classifier is used to character recognition. Angle and distance features of a character have been computed based on distribution of points on the bitmap image of character. In K-NN method, the Euclidean distance between testing point and reference points is calculated in order to find the k-nearest neighbours. We evaluated our method on the available dataset that contain 1200 sample. Using 70% samples for training, we tested our method on whole samples and obtained 99% correct recognition rate.Further, we achieved average 99.41% accuracy using three/strategy validation technique on 1200 dataset.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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