电子学报 ›› 2015, Vol. 43 ›› Issue (7): 1432-1436.DOI: 10.3969/j.issn.0372-2112.2015.07.028

• 科研通信 • 上一篇    下一篇

一种Zernike矩的高精度板材尺寸测量方法

李江昀1,2, 王宇浩1, 童朝南1,2   

  1. 1. 北京科技大学自动化学院, 北京 100083;
    2. 北京科技大学钢铁流程先进控制教育部重点实验室, 北京 100083
  • 收稿日期:2014-10-22 修回日期:2014-12-12 出版日期:2015-07-25 发布日期:2015-07-25
  • 通讯作者: 李江昀
  • 作者简介:王宇浩 男,1987年9月出生于北京市.北京科技大学自动化学院博士研究生,主要研究方向为计算机视觉、图像测量与模式识别. E-mail:aspirewang@126.com

An Accurate Zernike Moment-Oriented Method for Measuring Flat Strip Dimension

LI Jiang-yun1,2, WANG Yu-hao1, TONG Chao-nan1,2   

  1. 1. School of Automation & Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    2. Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education), University of Science and Technology Beijing, Beijing 100083, China
  • Received:2014-10-22 Revised:2014-12-12 Online:2015-07-25 Published:2015-07-25

摘要:

目前技术条件下,对于大视场的高精度边缘测量而言,工业级面阵CCD传感器的分辨率难以满足要求.文章针对钢板尺寸测量系统,首先介绍了测量环境和工作原理.继而在Zernike矩以及Zernike矩亚像素精度边缘检测原理的基础上,提出了适用于钢板尺寸测量的亚像素精度边缘检测算法.该算法不仅具较好的抗噪性能和检测精度,而且在传统界定边缘点的阈值处理方法上进行了改进,使边缘受限于单个像素的宽度范围内,能够实现亚像素精度的定位.系统实际运行表明,该方法能够有效提高测量精度,具有良好的效果和实用价值.

关键词: 边缘检测, 钢板尺寸, Zernike矩, 亚像素

Abstract:

Currently,the resolution of industrial-grade array CCD sensor can hardly satisfy the high precision requirements on the edge detection across a huge field.For the system of steel plate dimensional measurement,this paper introduces running environment and operation principle.Then,it proposes a sub-pixel level edge detection algorithm for steel plate dimensional measurement based on Zernike moment and also its theory applied to sub-pixel detection.This algorithm has good anti-noise performance and high detection precision.Moreover the proposed algorithm also improves the traditional threshold method for processing edge points,which can obtain an edge within a single pixel width and the location in sub-pixel level.In practice,the results show that the proposed algorithm improves the measurement accuracy and has efficient effect as well as practical value.

Key words: edge detection, plate dimension, Zernike moment, sub-pixel

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