摘要
本文提出了一种新的改进的数字散斑相关方法——十字搜索法。采用该方法将大大缩短计算时间，从而使数字散斑相关在微机上得到成功的应用。本文还从概率与统计的角度提出了新的相关系数计算公式，这个计算公式可以提高计算精度。文中还讨论了高精度测量的一些技术问题。初步实验验证表明，本文所提出的方法是一种实用的快速、高精度的位移、应变测试方法。
A new improved digital speckle correlation method一cross search method wasdescribed in this paper.The method will greatly reduce the computing time, and thus theapplications of digital correlation method using personal computer can be realized.Anewformula for calculating correlation coefficient wais presented based on the probability theoryBy this formula,the measuring accuracy of digital correlation method can be greatly im-proved.Some technique problems for obtaining high precision were discussed. The primaryexperimental results show that this method is a fast,precise method for displacement andstrain measurements.
出处
《力学学报》
EI
CSCD
北大核心
1994年第5期599-607,共9页
Chinese Journal of Theoretical and Applied Mechanics
关键词
数字散斑
相关
CAT
力学测量
digital speckle,correlation, image, deformation
