铁道科学与工程学报2024，Vol.21Issue(6)：2252-2260,9.DOI:10.19713/j.cnki.43-1423/u.T20231365
利用扣件位置关系定位图像边缘处不完整扣件的方法
A method for locating incomplete fasteners at the image edge using fastener position relationship
摘要
Abstract
Fastener positioning is a critical aspect of the fastener inspection process,directly influencing the reliability of the subsequent inspection.When a line array camera is used to acquire fastener images,the position of the fastener in the image is not fixed,which leads to the possibility that the same fastener may straddle two consecutive images and be truncated at the edge of the image.In this paper,these truncated fasteners were referred to as incomplete fasteners,whose upper and lower halves appeared at the edges of the two consecutive images,respectively.Locating the positions of these incomplete fasteners proved challenging due to their missing shapes,subsequently diminishing the reliability of fastener detection.In order to solve the above problems,this paper proposed a method for locating incomplete fasteners by using the fastener position relationship.Initially,the rail position in the original image was determined using a pixel statistics method.Subsequently,the original image sub-map containing rails and fasteners,termed the strip rail image,was acquired based on prior knowledge.The line-shaped rail map was then split to ensure the presence of multiple pairs of fasteners in the image.Next,template matching was employed to identify the most similar position to the fastener template.This information,combined with the positional relationship between fasteners,was utilized to identify incomplete fasteners within the image.The process involved determining whether there are incomplete fasteners and acquiring their position information.Ultimately,template matching was employed to assemble the two parts of the incomplete fasteners into a complete fastener image.The results show that the method proposed in this paper can locate 115 pairs of incomplete fasteners in 100%of the acquired images.The results have practical engineering value and can effectively solve the problem of locating incomplete fasteners at the edge of the image and improve the reliability of fastener detection.关键词
铁路扣件/扣件定位/像素统计/模板匹配/位置关系Key words
track fasteners/fastener positioning/pixel statistics/template matching/location relationship分类
交通工程引用本文复制引用
盛永强,陈兴杰,吕照民..利用扣件位置关系定位图像边缘处不完整扣件的方法[J].铁道科学与工程学报,2024,21(6):2252-2260,9.基金项目
上海市科委重点支撑项目(180305013007) （180305013007）
