两种插值亚像素定位法在数字散斑测量中的应用  

Applications of two interpolation sub-pixel positioning in digital speckle measurement

作　　者：赵玮[1] 周战荣[1] 吴长江[1] 闫夷升[1] 

机构地区：[1]第二炮兵工程学院基础部物理教研室,西安710025

出　　处：《光学技术》2008年第S1期248-250,共3页Optical Technique

摘　　要：利用数字散斑相关测量法只能得到试件的整像素位移量,不能满足高精度的测量要求。探讨了两种插值法在数字散斑亚像素级测量中的应用,并对相关系数多项式插值法和对数插值法的测量结果进行了比较,为在不同亚像素级位移条件下选择较为恰当的测量方法提供了依据。The correlative measurement by using digital speckle can only obtain the whole pixel's displacement and can't satisfy the demands of high-precision. Some applications of two interpolation sub-pixel positioning in digital speckle measurement are discussed,and the survey results using the methods of correlation coefficient polynomial interpolation and logarithm interpolation are compared,which provide a basis for appropriate measurement under the conditions of different sub-pixel positioning.

关 键 词：散斑 相关系数 多项式插值法 对数插值法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]