摘要： 车牌识别是智能交通系统的重要组成部分,提高车牌字符识别率的关键在于提取字符的特征。主曲线是主成分分析的非线性推广,它是通过数据分布“中间”并满足“自相合”的光滑曲线。通过对现有主曲线算法的分析可知:软K段主曲线算法对提取分布在弯曲度很大或相交曲线周围的数据的主曲线的效果较好。因此,尝试用该主曲线算法来提取车牌字符的结构特征。实验结果表明,利用该主曲线算法来提取车牌识别的结构特征能够取得较好的实验效果。所提方法为提取 车牌字符特征的研究提供了一条新途径。
| [1] HASTIE T.Principal curves and surfaces[J].Principal Curves & Surfaces,1984. [2] BANFIELD J D,RAFTERY A E.Ice floe identification in satellite images using mathematical morphology and clustering about principal curves[J].Journal of the American Statistical Association,1992,87(417):7-16. [3] KEGL B,KRZYZAK A,et al.A polygonal Line algorithm for constructing principal curves[C]∥Proceedings of Neural Information Processing System.Denver Colorado,USA:Computer Press,1999:501-507. [4] VERBEEK J J,VLASSIS N,KROSE B.A k-segments algori-thm for finding principal curves[J].Pattern Recognition Letters,2002,23(8):1009-1017. [5] VERBEEK J J,VLASSIS N,KROSE B.A soft k-segments algorithm for principal curves[M]∥ Artificial Neural Networks－ICANN 2001.Springer Berlin Heidelberg,2001:450-456. [6] DELICADO P.Another look at principal curves and surfaces[J].Journal of Multivariate Analysis,2001,77(1):84-116. [7] ZHANG J P,WANG Y.An Overview of Principal Curves[J].Chinese Journal of Computers,2003,6(2):129-146.(in Chinese) 张军平,王珏.主曲线研究综述[J].计算机学报,2003,6(2):129-146. [8] BAS E,ERDOGMUS D.Principal curves as skeletons of tubular objects:locally characterizing the structures of axons[J].Neuroinformatics,2011,9(2/3):181-191. [9] WANG H N,LEE T C M.Extraction of curvilinear features fromnoisy point patterns using principal curves[J].Pattern Recognition Letter,2008,29(16):2078-2084. [10] REINHARD K,NIRANJAN M.Parametric subspace modeling of speech transitions[J].Speech Communication,1999,27(1):19-42. [11] ZHANG J P,WANG X D,KRUGER U,et al.Principal curve algorithms for partitioning high-dimensional data spaces[J].IEEE Transactions on Neural Networks,2011,22(3):367-380. [12] ZHANG H Y,MIAO D Q,XIA F C,et al.Automatic Recognition System of Bills Based on Principal Curves[J].Journal of Information and Computational Science,2004,1(2):199-204. [13] ZHANG J P,CHEN D W,KRUGER U.Adaptive constraint k-segment principal curves for intelligent transportation systems[J].IEEE Transactions on Intelligent Transportation Systems,2008,9(4):666-677. |
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