基于OpenCV的圆心定位在地铁隧道变形监测中的应用  

Application of center of circle location in metro tunnels deformation monitoring based on OpenCV

作　　者：赵炯[1] 朱海涛[1] 屈剑平[1] 张根雷[1] 

机构地区：[1]同济大学机械与能源工程学院,上海201804

出　　处：《传感器与微系统》2013年第11期139-142,145,共5页Transducer and Microsystem Technologies

基　　金：上海市科委科研计划项目资助项目(08201202103)

摘　　要：为了满足复杂背景下计算机视觉检测目标高定位精度和快速提取的要求,研究了应用于地铁隧道变形监测的圆心定位技术。以OpenCV为图像开发库,通过对采集的圆形标志光源图像设置感兴趣区域、双边滤波、图像增强、边缘检测、目标识别和圆心拟合处理,计算出目标几何中心坐标,从而实现目标定位。实验结果表明:在5 m拍摄距离、标定值在10 mm之内时,检测误差小于0.1 mm。检测精度满足变形监测系统的单点测量精度要求。To meet requirements of high precision of location and quick extraction of computer vision detection target in complex background, center of circle location technology used for metro tunnels deformation monitoring is studied. Use the OpenCV Library, target location is achieved by setting region of interest, bilateral filtering, image enhancement, edge detection, target recognition, center of circle fitting and calculate geometric center coordinates of target for the light source image with circular mark. Experimental results show that the detection error is less than 0.1 mm when the shooting distance is 5 m and calibration value is within 10mm. And detection precision meets single-point measurement precision requirements of deformation monitoring system.

关 键 词：变形监测 计算机视觉 圆心定位 OPENCV 复杂背景 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]