Computer Engineering and Applications ›› 2009, Vol. 45 ›› Issue (13): 175-178.DOI: 10.3778/j.issn.1002-8331.2009.13.051
• 图形、图像、模式识别 • Previous Articles Next Articles
ZHU Xiao-hong,ZHANG Yong-lai,LIU Dong-lin
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朱晓红,张永来,刘冬林
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Abstract: License plate location(LPL) is one of the most important roles in the license plate recognition(LPR) system.The paper projects the conception of non-orthogonal haar wavelet transform based on haar wavelet that improves the uncontinuity of haar wavelet transformation.Based on non-orthogonal haar wavelet transformation,this paper integrates the method called scanning line which is rapid and the mathematical morphology which can accurately find license plate,and gets one rapid algorithm of license plate location.Then the algorithm is realized and tested with visual c++6.0.Experimental results indicate that the ratio of right location of license plate is higher than 95% with this algorithm.It is robust,especially used for detecting oblique license plate.
摘要: 车牌定位技术是车牌识别系统的关键技术之一,在haar小波变换的基础上,提出非正交haar小波概念,改进了haar小波不连续性特点。基于非正交haar小波变换,结合线扫描法快速性特点与数学形态学准确性特点,研究一种车牌快速定位算法,在此基础上运用visual C++ 6.0编程进行实验验证。实验结果表明,此算法车牌定位准确率达到95%以上,对倾斜车牌的检测鲁棒性较强。
ZHU Xiao-hong,ZHANG Yong-lai,LIU Dong-lin. License plate location technology based on non-orthogonal haar wavelet transformation[J]. Computer Engineering and Applications, 2009, 45(13): 175-178.
朱晓红,张永来,刘冬林. 非正交haar小波变换的车牌定位技术研究[J]. 计算机工程与应用, 2009, 45(13): 175-178.
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URL: http://cea.ceaj.org/EN/10.3778/j.issn.1002-8331.2009.13.051
http://cea.ceaj.org/EN/Y2009/V45/I13/175