摘要
为了准确检测出输电线路覆冰厚度以保证系统安全稳定运行,提出一种基于输电线路覆冰图像轮廓拟合的覆冰厚度测量方法。该方法对覆冰图片中感兴趣区域进行高斯滤波、阈值分割等图像预处理;利用提取到的覆冰轮廓进行最小二乘法曲线拟合,应用奇异值分解(SVD)得出最小二乘法的解;通过求取拟合曲线轮廓内的最大长度,得出覆冰的最大像素厚度。根据导线的实际外径和测量出的覆冰前导线像素厚度,得出覆冰的实际厚度。通过模拟试验进行验证,结果表明测量值与实际值误差在2mm以内,测量精度较高。
In order to accurately detect the icing thickness of transmission line to ensure the safe and stable operation of transmission line system,a method of icing thickness measurement based on contour matching of ice covered image of transmission line is proposed.This method employs Gauss filter on ice image region of interest,threshold segmentation and image processing and use the extracted ice contour for the least squares curve fitting.Least squares solution is obtained by singular value decomposition(SVD);maximum pixel thickness fitting curve is determined by maximum length in the outline of the ice cover and the actual thickness can be obtained from the actual diameter of wire and the measured ice front wire pixel thickness.The validity and accuracy of this method is verified by simulation test.The results show that error between measured value and actual value is within 2mm,and it is a satisfactory result.
作者
邵前程
胡伟
SHAO Qian-cheng;HU Wei(College of electrical engineering,Henan Polytechnic University,Jiaozuo 454150,China)
出处
《软件导刊》
2018年第4期201-204,共4页
Software Guide
基金
国家自然科学基金项目(51177052)
关键词
滤波
阈值分割
轮廓
最小二乘法
SVD
filtering
threshold segmentation
contour
least square method
SVD
