计算机工程与应用 ›› 2014, Vol. 50 ›› Issue (1): 149-152.

• 图形图像处理 • 上一篇    下一篇

Zernike矩结合Sigmoid曲线拟合边缘检测方法

刘明进1,王  珏1,2,蔡玉芳2,王慧倩3   

  1. 1.重庆大学 自动化学院,重庆 400044
    2.重庆大学 光电技术及系统教育部重点实验室 ICT研究中心,重庆 400044
    3.重庆大学 光电工程学院,重庆 400044
  • 出版日期:2014-01-01 发布日期:2013-12-30

Zernike moment combine Sigmoid fitting method in edge detection

LIU Mingjin1, WANG Jue1,2, CAI Yufang2, WANG Huiqian3   

  1. 1.College of Automation, Chongqing University, Chongqing 400044, China
    2.ICT Research Center, Key Laboratory of Optoelectronic Technology and System of the Education Ministry of China, Chongqing University, Chongqing 400044, China
    3.College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
  • Online:2014-01-01 Published:2013-12-30

摘要: 为了改进Zernike矩边缘检测方法对非直线边缘检测精度低的弱点,提出了一种改进的基于Zernike矩方法和Sigmoid拟合法的边缘检测方法。用Zernike矩边缘检测方法检测边缘,然后用Sigmoid拟合方法检测边缘,根据边缘类型对两种方法检测的边缘结果进行加权求和,所得结果为边缘位置。分别利用理想图像和实际工业CT图像进行了实验验证,实验结果表明对非直线边缘的检测,该方法检测精度相对于Zernike矩方法提高了一个数量级。

关键词: 边缘检测, Zernike矩法, Sigmoid拟合法, 亚像素, 加权修正

Abstract: An improved method based on Zernike moment and Sigmoid fitting is presented in order to improve the weakness of low accuracy when Zernike moment edge detection method detects non-straight edges. This papwr uses Zernike moment edge detection method to detect edge, then uses Sigmoid fitting method to detect edge, and adopts weighted sum method to fix the detection result according to the results of two methods, the results are what we want. Both ideal images and actual industrial CT images are used to demonstrate its accuracy, the experimental results show that the detection precision of the method proposed has improved one order of magnitude comparing with Zernike moment edge detection method when detecting non-straight edges.

Key words: edge detection, Zernike moment, Sigmoid fitting, sub-pixel, weighted fixed