Edge detection for image measurement based on nonlinear diffusion filtering

FU Shu-jun; RUAN Qiu-qi; MU Cheng-po; WANG Wen-qia

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Edge detection for image measurement based on nonlinear diffusion filtering

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- Edge detection for image measurement based on nonlinear diffusion filtering
- Optics and Precision Engineering Vol. 15, Issue 2, Pages: 289-293(2007)
- 作者机构：
  
  1. 山东大学数学与系统科学学院, 山东济南 250100
  2. 北京交通大学信息科学研究所, 北京 100044
  3. 北京理工大学宇航科学技术学院, 北京 100081
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP391.41
- Received：30 September 2006，
  
  Revised：14 December 2006，
  
  Published Online：20 February 2007，
  
  Published：20 February 2007
- 稿件说明：
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FU Shu-jun, RUAN Qiu-qi, MU Cheng-po, et al. Edge detection for image measurement based on nonlinear diffusion filtering[J]. Optics and precision engineering, 2007, 15(2): 289-293.
DOI：

FU Shu-jun, RUAN Qiu-qi, MU Cheng-po, et al. Edge detection for image measurement based on nonlinear diffusion filtering[J]. Optics and precision engineering, 2007, 15(2): 289-293. DOI：

摘要

提出了一种基于自适应非线性扩散方程滤波的边缘检测方法

以提高图像测量的精度。首先对原始图像实施一种非线性扩散处理

即沿着等照度线(边缘)的梯度方向实施反向扩散以锐化边缘

而相反地沿切线方向实施正向扩散以去除噪声和锯齿伪像; 然后应用经典的微分算子来检测边缘。实验结果表明

相对于经典的边缘检测算子

本算法得到了尖锐而平滑的单像素宽的图像边缘

较好地定位了边缘

相对误差为0.03。当图像边缘模糊和存在附加噪声时

测量结果将会受到很大影响。本方法较好地定位了边缘像素

对于微小尺寸测量显示出它的优越性.

Abstract

Image measurement technique is a new developing method in the non-contact measurement and instrument fields. In this paper

an adaptive nonlinear flow equation process is presented to improve the measurement precision. First

an inverse diffusion is performed to sharpen edges along the normal directions to the isophote lines (edges)

while a normal diffusion is done to remove noise and artifacts ("jaggies") along the tangent directions. Then

classical differential operator is employed to detect image edges. With a better edge location

experimental results show that sharper and smoother edges with one pixel are abtained in a relative error of 0.03. The method also shows its advantages in the minuteness measurement for a better edge location. In the case of blurry edges and additional noise in the image

the measurement results would be worse.

关键词

Keywords

references

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Related Institution

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