We present a global optimization method, called the genetic algorithms (GAs), for digital image/speckle correlation (DISC). The new algorithms do not involve reasonable initial guess of displacement and deformation gradient and the calculation of second-order spatial derivatives of the digital images, which are important challenges in practical implementation of DISC. The performance of a GA depends largely on the selection of the genetic operators. We test various operators and propose optimal operators. The algorithms are then verified using simulated images and experimental speckle images.
© 2005 Chinese Optics Letters
Chen Tang, Ming Liu, Haiqing Yan, Guimin Zhang, and Zhanqing Chen, "The improved genetic algorithms for digital image correlation method," Chin. Opt. Lett. 2, 574-577 (2004)