摘要
对绝缘子进行定位是实现其非接触式爬电距离测量的前提条件,为此本文依据绝缘子自身所具有的形态和分布特点,提出一种基于霍夫变换和RANSAC算法的绝缘子定位方法。首先利用Canny边缘检测获取绝缘子的边缘特征,并依赖其形似圆的特点结合霍夫圆变换进行检测;接着依据其在串中间距大体相等且串似直线的特点,利用修正的RANSAC算法提取圆心构成直线;最后遍历直线用红色矩形框对其进行有效定位。实验结果表明,本定位方法可对绝缘子进行有效定位,为绝缘子爬电距离的计算等后续研究提供了基础。
Insulator location is a premise condition of non-contact creepage distance measurement.Dependent on the morphology and distribution characteristics of the insulator,we proposed a method of insulator localization based on Hough transformation and RANSAC algorithm.Firstly,we obtained the edge of the insulator image with Canny edge detection,and dependent on the characteristics of the insulator is shaped like a circle,we combined Hough-circle transformation to test.Secondly,according to the characteristics of the insulator spacing roughly equal and the insulator string like a straight line,we fitted the center points of the circles with the modified RANSAC algorithm.Finally,we traversed the straight line and located insulator with a red rectangular box.The experimental results have shown that this method can locate the insulator effectively,which provides the basis for the subsequent research of the insulator detection and so on.
作者
沈新平
彭刚
袁志强
Shen Xinping Peng Gang Yuan Zhiqiang(Test Research Institute of Huizhou Power Supply Bureau, Guangdong Power Grid Co. , Ltd. , Huizhou 516001, China Department of Technique, Beijing Purui Electronic Co. , Ltd. , Beijing 100070, China)
出处
《电子测量技术》
2017年第6期132-137,共6页
Electronic Measurement Technology
