作者：唐艳丽, 苏燕辰

作者单位：西南交通大学机械工程学院, 四川成都 610031

关键词：数字图像处理; 距离测量; 边缘检测; Sobel算子; LabWindows/CVI

摘要：

为了克服接触式测量中的一些弊端,如测量时加在物体上的物理效应、测量环境的高要求、人为误差较大等,结合了现代数字图像处理技术和视觉测量方法,采用了非接触式测量方法进行距离测量。建立了图像采集系统,运用LabWindows/CVI软件设计的Sobel算子对采集到的图像进行边缘检测,得到两边缘线之间的像素差值,并代入距离计算公式求得距离。结果表明,该测量方法所得结果与实际值符合,证实了基于数字图像处理的距离测量方法的准确性。

Digital image processing applied in distance measuring

TANG Yan-li, SU Yan-chen

School of Mechanical and Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract: To overcome the disadvantages of contact measurement such as physical effects applied on object during measuring, high requirement for measurement environment, large personal error etc, non-contact measurement which combined modern digital image processing technology and vision measurement was used to acquire distance.The difference of pixel values between edge lines was gained after Sobel operator of LabWindows/CVI software was applied on edge detection to the image collected by image collection system which was set up before detecting.Then distance was obtained just substituting the difference to the distance equation.The coherence between this method and contact measurement showed the accuracy of distance measuring method based on digital image processing technology.

Keywords: Digital image processing; Distance measuring; Edge detection; Sobel operator; LabWindows/CVI

2009, 35(1): 63-67  收稿日期: 2008-6-27;收到修改稿日期: 2008-9-3

基金项目: 

作者简介: 唐艳丽(1982-),女,湖南常德人,硕士研究生,专业方向为自动化测试技术与PC仪器。

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