联合图像处理和目标约束的车道线检测方法

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Abstract:Aiming to solve the problems such as the low detection accuracy and the serious disturbances caused by noise in multi-peak detection,the paper developed a new lane detection algorithm which combines the road image pre-processing with the Target Constraint Range algorithm. Firstly,an improved median filter is used to remove noise from the greyscale images. Then based on the Maximum Variance Method, the lane line edges are extracted by using the Canny Algorithm. Combined with data pre-processing,the TCR algorithm reduces the lane detection range by the target area segmentation and the polar-angle-polararm method. And the Hough transform method is improved by using the operators [1 0 -1] and [-1 0 1] respectively to perform the edge superposition for the left and right lane lines. Tracking the lane lines with the new TCR can solve the problems in lane departure detection. Finally,a vehicle testing platform is built with a software platform. The experimental results show that the detection accuracies of 93.8% and 91.6% are produced respectively for straight and curved roads,and the interference of light strength can be eliminated. Keywords:lane line detection;image processing;Hough transform;target constraint range
关键词:车道线检测;图像处理;霍夫变换;目标约束算法
中图分类号:U471.15
文献标识码:A
DOI:10.3969/j.issn.2095-1469.2019.01.04
A Lane Line Detection Method Combining Image Processing with Target Constraint Range Algorithm
第9卷 第1期 第210期19 年 1 月
汽车工程学报 骆济焕Ch等in:ese联 J合ou图rn像al处 of理 A和ut目om标o约tiv束e 的En车gi道ne线er检in测g 方法
Vol.9 No.1 Jan. 2019 027
联合图像处理和目标约束的车道线检测方法
骆济焕,兰凤崇,陈吉清
(华南理工大学 机械与汽车工程学院 广东省汽车工程重点实验室 , 广州 510640)
Luo Jihuan,Lan Fengchong ,Chen Jiqing
(Guangdong Provincial Key Laboratory of Automotive Engineering,School of Mechanical and Automotive Engineering, South China University of Technology,Guangzhou 510640,China)
收稿日期:2018-01-21 改稿日期:2018-03-14 基金项目:广东省科技计划项目(2017B010119001;2015B010137002)
参考文献引用格式: 骆济焕,兰凤崇,陈吉清 . 联合图像处理和目标约束的车道线检测方法 [J]. 汽车工程学报,2019,9(1):27-35. LUO Jihuan,LAN Fengchong,CHEN Jiqing. A Lane Line Detection Method Combining Image Processing with Target Constraint Range Algorithm [J]. Chinese Journal of Automotive Engineering,2019,9(1):27-35. 对车道线检测存在检测精度不够高、多峰值检测、受噪声干扰严重的问题,设计了道路图像前处理算法和目 标约束(Target Constraint Range,TCR)算法结合的新型车道线检测算法。对灰度化的图像进行改进的中值滤波除噪, 再基于最大类方差法,用 Canny 算法提取车道线边缘。结合前处理算法,TCR 算法通过目标区域划分和极角极径法 来缩小检测范围,且运用算子 [1 0 -1] 和 [-1 0 1] 对车道左右双线分别进行边缘叠加处理来提高霍夫变换法(Hough Transform)的检测精度,在新的 TCR 下进行车道线跟踪,解决了车道线检测偏离问题,搭建了汽车试验平台和软件平台。 试验结果表明,检测算法在直道和弯道行驶下的检测准确率分别为 93.8% 和 91.6%,且能排除弱光照和强光照干扰。