ZHAO Jiong, ZHU Hai-tao, QU Jian-ping, et al. Application of center of circle location in metro tunnels deformation monitoring based on OpenCV[J]. 2013, 32(11): 139-142+145.
ZHAO Jiong, ZHU Hai-tao, QU Jian-ping, et al. Application of center of circle location in metro tunnels deformation monitoring based on OpenCV[J]. 2013, 32(11): 139-142+145. DOI: 10.13873/j.1000-97872013.11.032.
基于OpenCV的圆心定位在地铁隧道变形监测中的应用
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。
Abstract
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.
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