道岔参数在线测量中激光条纹中心自适应提取

打开文本图片集

关键词：视觉测量；线结构光；中心线提取;Steger；自适应中图分类号：TP394.1；TH744.5 文献标识码：Adoi：10.37188/OPE.20253315.2414 CSTR：32169.14.OPE.20253315.2414

Adaptive extraction of laser stripe center for on-line measurement of turnout parameters

JING Yingchun 1，2 ，HE Qixin 1，2* ， CUI Jianying 1，2 ， ZHANG Zheng 1，2 ， FENG Qibo 1，2 （1.School ofPhysical Science and Engineering，Beijing Jiaotong University，Beijing 1Oo044，China; 2. MOE Key Lab ofLuminescence and Optical Information， Beijing JiaotongUniversity，BeijinglOoO44，China） * Corresponding author， E-mail： heqixin@bjtu. edu. cn

Abstract： The accuracy of laser stripe center extraction critically determines the precision of structuredlight vision measurements. In an online structured-light turnout-parameter measurement system，variations in stripe position due to turnout movement and environmental disturbances produce uneven stripe brightness and width，degrading measurement accuracy. To address these issues，an adaptive extraction method for the stripe center is proposed based onan improved Steger algorithm，ofering enhanced environmental robustness and high precision. The method first isolates the effective stripe region using Otsu thresholding combined with a Two-Pass algorithm to suppress stray-light interference and accelerate computation. The stripe skeleton is then extracted and initial center points are refined. A neighborhood geometric normal-direction computation is introduced to determine the stripe cross-sectional width.By correlating the measured stripe width with the Gaussian kernel parameter σ ，the convolution-kernel size is adaptively adjusted，yielding an accurate sub-pixel centroid of the stripe.Evaluation on a standard calibration block demonstrates an average measurement error within 0.09mm . The proposed adaptive approach exhibits strong anti-interference capability and high accuracy，making it suitable for online measurement of turnout parameters.

Key Words： vision measurement； line structured light；centerline extraction； Steger;adaptive

1引言

道岔是列车从一股轨道转换到另一股轨道的线路设备，可以实现铁路不同轨道之间的相互连接。（剩余11343字）