基于改进Zernike矩法的电缆护套材料亚像素厚度测量  

Sub-pixel Measurement of Thickness of Cable Sheath Materal Based on Improved Zernike moment

作　　者：王吉林[1] 赵力[2] 

机构地区：[1]盐城工学院信息工程学院,江苏盐城224051 [2]东南大学信息科学与工程学院,江苏南京210096

出　　处：《计算机测量与控制》2010年第4期782-784,788,共4页Computer Measurement &Control

基　　金：国家自然科学基金项目资助(60472058)

摘　　要：图像测量技术因其具有测量精度高、动态范围大、灵活性好等优点,如今已广泛被用在几何尺寸测量领域,亚像素定位是其中一项关键的技术,可实现对目标优于整像素精度的定位;针对普通Zernike矩亚像素定位法速度较慢的缺点,提出了基于Sobel的改进Zernike矩法,并将其应用到电缆护套材料的厚度图像测量系统中,在保证精度基本不变的情况下算法速度大幅度提高,实验显示速度提高了85%以上。Image measurement technology has been widely used in geometry measurement field because of its high accuracy, large dynamic range and good flexibility. Sub-pixel positioning is one of the key technologies which can achieve positioning better than entire pixel accuracy. In this paper, we put forward an improved Sobel- Zernike moment sub-pixel method based on ordinary Zernike moment method, which increase the algorithm speed while the algorithm accuracy remain basically unchanged. Then apply it to the cable sheath material thickness measurement. The experiment results indicate that the algorithm speed can be above 85 % on a certain accuracy.

关 键 词：图像测量 亚像素 Zernike矩法 电缆护套材料 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]