基于机器视觉的圆定位技术研究-计算机工程与应用.PDFVIP

Computer Engineering and Applications 计算机工程与应用 2012 ，48 （9） 153 基于机器视觉的圆定位技术研究 1，2 1，2 李 婷 ，柳 宁 LI Ting1，2 , LIU Ning1，2 1.暨南大学 电子工程系，广州 510632 2.暨南大学 数控与机器视觉研究中心，广州 510632 1.Department of Electronic Engineering, Jinan University, Guangzhou 510632, China 2.Computerized Numerical Control and Machine Vision Research Center, Jinan University, Guangzhou 510632, China LI Ting, LIU Ning. Study on circle locating technology based on machine vision. Computer Engineering and Applications, 2012, 48 （9 ）：153-156. Abstract ：For locating circle objects detection which appears commonly in machine vision, an algorithm is put forward, which com- bines Blob analysis with least-square-fitting to detect circle objects. Blob analysis is used to locate circle objects roughly, which gives out target circle center and radius as the results. According to the output, boundary points are detected and used as the input of least square circle fitting. Detecting target circles and locating the middle of the circles automatically are carried out by this algorithm, and the experiment has been carried out on vision system based on DSP using piano string poles as an example. The results show that it can meet the real-time requirement and detect the object accurately. Key words ：machine vision; location; Blob analysis; least-square-fitting; Digital Signal Processor（DSP ） 摘 要：针对视觉处理中常见的圆形目标检测，提出了结合Blob 分析与最小二乘法圆拟合的定位检测方法，利用Blob 分析算法 实现粗定位，根据粗定位的输出检测目标圆的边界点，将其作为输入参数给最小二乘法圆拟合进行精定位；实现了在视场范围内 对圆形区域自动检测及中心定位，在DSP 视觉系统上以钢琴弦柱加工为检测背景对算法进行验证，实验结果表明算法满足工业 应用中的实时性和精确性要求。 关键词：机器视觉；定位；Blob 分析；最小二乘法；数字信号处理器（DSP ） DOI ：10.3778/j.issn. 1002-8331.2012.09.044 文章编号：1002-8331（2012 ）09-0153-04 文献标识码：A 中图分类号：TP391 [6] 机器视觉是用机器代替人眼来做测量和判断。在视觉测 检测的图像进行匹配定位目标区域 。Bulanon ，D.M.等利用 量和视觉识别的机器视觉系统，视觉定位是最早最必须的一