基于改进Sobel算子的车牌边缘检测算法  

The License Plate Edge Detection Algorithm Based on Improved Sobel Operator

作　　者：谢添生 孙林举 

机构地区：[1]江苏省镇江新区经济发展局企业科技创新服务中心,镇江212132 [2]江苏大学计算机与通信工程学院,镇江212013

出　　处：《无线通信技术》2014年第4期36-40,共5页Wireless Communication Technology

摘　　要：针对车牌识别中车牌的边缘信息在Sobel算子的检测下易受到图像采集环境的影响,阈值难以确定,不具有自适应性且对噪声的敏感度高这一特点,提出了一种采用基于二次搜索寻优的阈值选取策略算法,并得出了一套完整的Sobel对车牌边缘检测的算法。实测结果表明:该方法能够更好的解决Sobel算法中存在的由于阈值不自适应性导致边缘检测出现伪边缘点和粗糙点,增强了检测的实时性和鲁棒性。The Sobel operator edge detection for license plate recognition enced by the shooting environment easily, which leads to the difficulty to and does not have the self - adaptability and high sensitivity to the noise, information is often influ- determine the threshold, This paper proposed a se- lection strategy algorithm based on a secondary search optimization threshold and obtained a com- plete set of Sobel edge detection algorithm on the license plate. The results showed that the method can better address Sobel algorithm which leaded to false edge points and rough spots for the reason of not self- adaptive threshold, It also obtained a precise edge detection and enhanced real -time de- tection and robustness.

关 键 词：车牌边缘检测 SOBEL算子 阈值化 噪声 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]