| 基于改进随机Hough变换的快速中心检测方法 |
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| 引用本文： | 刘延杰,赖日飞,荣伟彬,孙立宁.基于改进随机Hough变换的快速中心检测方法[J].纳米技术与精密工程,2011,9(4):298-304. |
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| 作者姓名： | 刘延杰 赖日飞 荣伟彬 孙立宁 |
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| 作者单位： | 哈尔滨工业大学机器人技术与系统国家重点实验室,哈尔滨,150080 |
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| 基金项目： | 国家自然科学基金资助项目(50705027); 国家高技术研究发展计划(863计划)资助项目(2007AA04Z314); 新世纪优秀人才支持计划资助项目(NCET-08-0170) |
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| 摘 要： | 为了实现芯片焊盘的中心提取,建立了显微视觉系统,研究了焊盘中心坐标的图像检测方法.该方法将改进的随机Hough变换与最小二乘法结合起来,实现对焊盘中心坐标的快速准确定位.首先,根据焊盘基本为圆形的特征,初步确定使用Hough变换法和最小二乘法进行中心检测.其次,分析了这两种方法存在的问题和不足,引出了改进的随机Hough变换法.最后,根据焊盘边缘凹凸不平的特点,将改进的随机Hough变换法和最小二乘法结合起来,通过随机Hough变换检测出焊盘中心的大致坐标,进而锁定焊盘边缘,再通过最小二乘法对中心坐标进行修正而得到精确的亚像素级中心坐标.实验结果表明,该方法的检测精度可达0.57μm,运行时间在12 ms以内,满足显微视觉系统的精度高、速度快和抗干扰能力强等要求.
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| 关 键 词： | 机器视觉 芯片焊盘 中心检测 随机Hough变换 最小二乘法 |
A Fast Center Detecting Method Based on Improved Randomized Hough Transform |
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| LIU Yan-jie,LAI Ri-fei,RONG Wei-bin,Sun Li-ning.A Fast Center Detecting Method Based on Improved Randomized Hough Transform[J].Nanotechnology and Precision Engineering,2011,9(4):298-304. |
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| Authors: | LIU Yan-jie LAI Ri-fei RONG Wei-bin Sun Li-ning |
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| Affiliation: | LIU Yan-jie,LAI Ri-fei,RONG Wei-bin,Sun Li-ning(State Key Laboratory of Robotics and System,Harbin Institute of Technology,Harbin 150080,China) |
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| Abstract: | A micro-vision system was established and the image detection method of center coordinates was studied for realizing the center detection of chip pad.This method can achieve fast and accurate location of the pad's center coordinates by the combination of the improved randomized Hough transform and the least squares method.Firstly,according to the basic characteristics of the circular pad,Hough transform and the least squares method were determined to be used in primitive detection.Secondly,the improved rand... |
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| Keywords: | machine vision chip pad center detection randomized Hough transform least squares method |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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