车牌字符提取中的矫正和切割算法研究  

Studies on Algorithms to Detect and Segment Licence Plate Figure

作　　者：汪刘一[1] 付银莲[2] 金玲玲[2] 

机构地区：[1]华南农业大学工程学院,广东广州510642 [2]华南农业大学理学院,广东广州510642

出　　处：《华南农业大学学报》2006年第3期100-102,共3页Journal of South China Agricultural University

基　　金：广东省高速公路系统开发应用项目

摘　　要：针对车牌字符提取中的图片矫正和切割关键部分,提出了一种基于Hough变换的车牌字符倾斜角度的自动检测矫正算法.在此基础上提出了一种基于边缘分析的二值化算法的投影判断法.对字符目标的灰度和纹理分布进行优化提取.经实地测试检验,字符切割的正确率提高了15%.A thresholding method is based on edge analysis combined with projection technique. With improved detection of grey level and texture of character objects, the new method offers greater robustness and higher processing speed compared with convensional methods. A detection method is also proposed based on Hough transform for detecting character orientation and making correction. Side experiment results showed the new methods improved successful recognition rate greatly.

关 键 词：图像处理 字符提取 边缘分析 二值化 投影法 

分 类 号：TN911.73[电子电信—通信与信息系统]