基于多尺度边缘拟合的陶瓷过滤网质量检测方法  

Quality Inspection of Ceramic Filter Based on Multi-scale Edge Fitting

作　　者：周静 董子昊[1,2,3] 任佳颖 郑飞 李金屏 ZHOU Jing;DONG Zihao;REN Jiaying;ZHENG Fei;LI Jinping(School of Information Science and Engineering,University of Jinan,Jinan 250022,China;Shandong Provincial Key Laboratory of Network Based Intelligent Computing,University of Jinan,Jinan 250022,China;Shandong College and University Key Laboratory of Information Processing and Cognitive Computing in 13th Five-year,University of Jinan,Jinan 250022,China;Shengquan Group Co.,Ltd.,Jinan 250204,China)

机构地区：[1]济南大学信息科学与工程学院,济南250022 [2]济南大学山东省网络环境智能计算技术重点实验室,济南250022 [3]济南大学山东省“十三五”高校信息处理与认知计算重点实验室,济南250022 [4]济南圣泉集团股份有限公司,济南250204

出　　处：《光子学报》2021年第11期165-176,共12页Acta Photonica Sinica

基　　金：山东省重点研发计划(No.2017CXGC0810)。

摘　　要：针对人工检测陶瓷过滤网效率低、精度差等问题,提出了一种基于多尺度边缘拟合的方法,通过引入多尺度思想实现边缘的精确定位,并设计边缘筛选方案有效降低不规则边缘对直线拟合的影响。首先采用基于多尺度的边缘检测方法提取外边缘;其次设计分段拟合的筛选方案以剔除不规则的边缘;然后采用加权最小二乘法拟合筛选后的边缘;再在对边缘进行精确直线拟合的基础上,利用缺陷凸出、凹陷特点提取距离等特征,构建缺陷判别规则检测外形缺陷。最后根据几何运算获取外形尺寸,并与标准尺寸进行比较判断产品质量。实验结果表明,该方法可快速、准确地检测陶瓷过滤网外形缺陷和尺寸。The ceramic filter quality detection mainly relies on manual inspection,which has various problems such as low efficiency and poor accuracy.In order to solve these problems,a method based on multi-scale edge fitting was proposed.The idea of multi-scale was introduced to realize the edge detection on multiple scales,and the edge screening strategy was designed to effectively reduce the influence of irregular edge on line fitting.Firstly,an edge detection method based on multi-scale is proposed to accurately extract the edge.Secondly,the edge screening strategy based on piecewise linear fitting is designed to screen out the irregular edge.Thirdly,after screening,the weighted least squares method is used to fit the edge.Fourth,on the basis of the precise linear fitting of the edge,by analyzing the characteristics of defects,the distance difference features are extracted and the defect discrimination rules are constructed to detect the shape defects.Finally,the dimension is calculated by the geometric calculation and compared with the dimension of standard ceramic filter to judge the product quality.The experimental results demonstrate that the proposed method can quickly and accurately detect the dimension and shape defects of the ceramic filter.

关 键 词：机器视觉 陶瓷过滤网 尺寸测量 缺陷检测 最小二乘法 分段拟合 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]