沈新平,彭刚,袁志强.基于霍夫变换和RANSAC算法的绝缘子定位方法[J].电子测量技术,2017,40(6):132-137
基于霍夫变换和RANSAC算法的绝缘子定位方法
Insulator location method based on Hough transformation and RANSAC algorithm
  
DOI:
中文关键词:  边缘检测  Canny算子  霍夫变换  RANSAC算法  绝缘子图像
英文关键词:edge detection  Canny operator  Hough transformation  RANSAC algorithm  insulator image
基金项目:
作者单位
沈新平 广东电网有限责任公司惠州供电局试验研究所惠州516001 
彭刚 广东电网有限责任公司惠州供电局试验研究所惠州516001 
袁志强  
AuthorInstitution
Shen Xinping Test Research Institute of Huizhou Power Supply Bureau, Guangdong Power Grid Co., Ltd., Huizhou 516001, China 
Peng Gang Test Research Institute of Huizhou Power Supply Bureau, Guangdong Power Grid Co., Ltd., Huizhou 516001, China 
Yuan Zhiqiang Department of Technique, Beijing Purui Electronic Co., Ltd., Beijing 100070, China 
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中文摘要:
      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。
英文摘要:
      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.
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