变形测量的数字图像相关分析法

Digital Image Correlation Analytic Method in Deformation Measurement

通过变形形态函数的引入，将数字图像（散斑）相关搜索方法进一步推广，提出了数字图像相关分析法．在这一方法中，把对位移及其各个导数分量独立进行的相关迭代变为对变形形态函数的系数进行相关迭代，从而既简化了迭代过程，又实现了整个变形场的直接测量（计算）．典型的实验结果验证了这一方法的可行性．

This paper presents a digital image corrclation analytic method, whichis the extension of digltel image correlation search method, through introducing the deformation shape functions into the trial displacement functions. In this method, the formeriy iterative procedure, in which the trial displacements and their derivatives are considered as independent variables, is sAnplified as a new correlation iterative procedure for the coemcients of the deformation shape functions. Moreover, direct and whole-field measurement (computetion) of deformation is promisingly achieved. Typical experhaental results have proved the viability of the presented method.