Digital speckle correlation search method and its application

XinGeng Zhou; Jianxia Gao

doi:10.1117/12.49542

1 December 1991 Digital speckle correlation search method and its application

XinGeng Zhou, Jianxia Gao

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.49542
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

A digital speckle correlation method based on principle of area correlation in pattern recognition technique is proposed. The effect of speckle displacement gradients on correlation is neglected, only displacements are into account. It much simplify the correlation iterative process and save computer run time. The selection of correlation function, the reliability of search recognition and the sensitivity of the method are discussed. The rigid body motion and strain measurement test were done to verify the method. Application examples are given on measuring fluid velocity field and forging deformation. The method also was used to process photographs of very high magnification taken by scanning electron microscope. These results demonstrate that it has the potential to be an quantitatively measuring tool for micro mechanics.

Citation Download Citation

XinGeng Zhou and Jianxia Gao "Digital speckle correlation search method and its application", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.49542

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