基于改进的Sobel-Zernike矩法亚像素厚度测量  

Subpixel thickness measurement based on improved Sobel-Zernike moment

作　　者：杨前华[1,2] 姚励 赵力[2] Yang Qianhua;Yao Li;Zhao Li(School of Communication, Nanjing College of Information Technology Communication Institute, Nanjing 210023, China;School of Information Science and Engineering, Southeast University , Nanjing 210018, China)

机构地区：[1]南京信息职业技术学院通信学院,南京210023 [2]东南大学信息科学与工程学院,南京210018

出　　处：《电测与仪表》2019年第10期99-104,133,共7页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(61571106);江苏高校品牌专业建设工程资助项目(PPZY2015A092)

摘　　要：针对 Zernike矩亚像素定位算法精度较高,但算法运算时间较长的问题,提出基于 Sobel的改进 Zemike矩亚像素定位法,该算法通过Sobel检测初步定位护套和绝缘材料的边缘,缩小 Zermke矩的计算范围,使得在精度基本不变的情况下,缩短了计算时间,提高了速度,并通过估计边缘点正态分布的均值将轮廓像素宽度缩小在单像素上,提高了算法的精度。通过将该算法与Zemike矩法以及插值法在精度和速度上的对比实验,验证了该算法的优越性,具有应用价值。In view of the high precision of the Zernike moment subpixel location algorithm,while the algorithm has a long operation time,an improved Zernike moment subpixel location method based on Sobel is proposed in this paper. The algorithm detects the initial location of the sheath and the edge of the insulation material by Sobel,and reduces the computation range of the Zernike moments,so that the computation time is shortened and the speed is increased when the accuracy is basically unchanged. The accuracy of the algorithm is improved by reducing the width of the contour pixel on the single pixel and estimating the mean value of the normal distribution of the edge points. The superiority of the algorithm is verified by comparing the accuracy and speed of the improved Sobel-Zernike moment method,the common Zernike moment method and the improved interpolation method,which has a certain application value.

关 键 词：Sobel-Zernike矩法 亚像素 定位 厚度测量 

分 类 号：TM93[电气工程—电力电子与电力传动]