中南大学学报（自然科学版）2017，Vol.48Issue(7)：1734-1740,7.DOI:10.11817/j.issn.1672-7207.2017.07.007
光波导器件边缘的高精度直线检测
High-precision line detection of optical waveguide devices edge
摘要
Abstract
In order to detect the waveguide edges accurately and quickly in the alignment of optical waveguide devices and ensure the detection precision,a high-precision fast line detection method was proposed.The procedures were as follows.Firstly,the machine vision system and accuracy requirement of waveguide devices alignment were analyzed.Secondly,the subpixel edge points were extracted through fitting the first derivative of gray value distribution of coupling interface and solving the peak value.Lastly,the fitting method based on the RANSAC and OLS algorithm was applied in the extracted pixels to obtain the fitting lines,and the waveguide posture parameters were computed subsequently.The results show that the detection angle error is less than 0.003°,the distance error is less than 0.1 pixel and the time consumption is less than 0.5 s using the proposed method.Besides,it can accurately fit waveguide edge with some noises such as the damage and smudginess,and therefore,it can realize the high-precision line detection of optical waveguide devices edge.关键词
直线检测/光波导器件/亚像素边缘/RANSAC算法Key words
line detection/optical waveguide devices/subpixel edge/RANSAC algorithm分类
信息技术与安全科学引用本文复制引用
吕文,郑煜,王丽军,李继攀,段吉安..光波导器件边缘的高精度直线检测[J].中南大学学报（自然科学版）,2017,48(7):1734-1740,7.基金项目
国家自然科学基金资助项目(51475479) （51475479）
国家高新技术研究发展计划(863计划)项目(2012AA040406) （863计划）
湖南省自然科学基金资助项目(14JJ2010) （14JJ2010）
流体动力与机电系统国家重点实验室开放基金资助项目(ZKF-201401) (Project(51475479) supported by the National Natural Science Foundation of China （ZKF-201401）
Project(2012AA040406) supported by the National High-Tech R&D Program (863 Program) of China （2012AA040406）
Project(14JJ2010) supported by the Natural Science Foundation of Hunan Province （14JJ2010）
Project(ZKF-201401) supported by the Open Project of Stage Key Laboratory of Fluid Power Transmission and Control) （ZKF-201401）
