基于改进LSD直线检测算法的钢轨表面边界提取  

Rail Surface Boundary Extraction Based on Improved LSD Line Detection Algorithm

作　　者：曹义亲[1] 何恬 刘龙标 Cao Yiqin;He Tian;Liu Longbiao(School of Software,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学软件学院,江西南昌330013

出　　处：《华东交通大学学报》2021年第3期95-101,共7页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(61663009);江西省科技支撑计划重点项目(20161BBE50081)。

摘　　要：针对传统LSD直线检测算法容易丢失图像细节,造成提取直线不连续等不足,提出一种基于双边滤波改进Canny提取边缘图像的LSD直线检测算法。利用Canny算法提取边缘图像,基于边缘图像采用LSD直线检测算法进行直线提取;考虑到Canny边缘检测中使用高斯滤波,在降噪的同时会模糊图像边缘,而双边滤波对于图像边缘有较好的保护作用,采用双边滤波代替Canny边缘检测中的高斯滤波进行边缘图像提取。同时,将基于双边滤波改进Canny提取边缘图像的LSD直线检测算法应用到钢轨表面边界提取中。实验结果表明,改进LSD直线检测算法对钢轨表面边界直线提取效果较佳,相关评价指标得到较大提升,正常钢轨图像和锈迹钢轨图像的峰值信噪比分别提升6.49%和13.58%,为后续钢轨表面缺陷识别奠定了基础,具有一定的实用价值。In view of the shortcomings of traditional LSD line detection algorithm,such as the tendency to lose details and discontinuity of line extraction,this paper presents an LSD line detection algorithm based on bilateral filter proposed to improve Canny edge image extraction.The Canny algorithm was used to extract the edge image,based on which LSD line detection algorithm is used to extract the line.For the Canny edge detection using gaussian filtering,the image edge will be blurred while reducing the noise.The bilateral filtering has a better protection effect on the edge of the image.Therefore,the algorithm adopts bilateral filtering instead of Gaussian filtering in the Canny edge detection to extract the edge image.At the same time,the LSD line detection algorithm based on bilateral filter to improve Canny edge image extraction was applied to the rail surface boundary extraction.The results show that LSD linear extraction algorithm based on Canny edge detection and edge image extraction based on bilateral filtering was better for the linear extraction of rail surface boundary.The relevant evaluation indexes have been greatly improved and the peak signal-to-noise ratio of the experimental images increased by 6.49%and 13.58%respectively.It lays a foundation for the subsequent identification of rail surface defects and has certain practical value.

关 键 词：钢轨边界提取 CANNY算法 双边滤波 直线检测 LSD算法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]