摘要
利用计算机数字图象处理技术，对变形栅线的图形经Ｆｏｕｒｉｅｒ变换的一系列处理后，可形成云纹图．研究在处理过程中移位象素与形成的云纹图形之间的关系．结果表明，移位象素与形成的云纹图形之间有定量关系．掌握和利用这种定量关系，可提高云纹图的信息量，为进一步根据形成的云纹图进行应变和应力分析计算提供准确的数据依据，给出了位移象素与云纹图之间定量关系的理论分析和图形对照分析的结果。
A moire pattem can be formed by using fourier transform for a digital image of deformedgrating lines.In this paper,the realtionship betwecn shift pixel points and a formed More pattcm in pro-cessing is studicd. The results show that thers is certain quantitative rclationship between shift pixel pointsand a formed Moirc pattern. To find out and make use of the quantitative reationship isvery useful for in-crcasing the data capacity of the Moire pattern and providing accurate data that are used to computestrain and stress further. The results of theorctical analysis and pattern′s comparison analysis for the quantitative relationxhip are given.
基金
云南省科学技术应用基金
关键词
数字图象处理
云纹图
定量分析
傅立叶变换
Digit image processing,fourier transform
Moire pattern
quantitative analysis
