Displacement measurements in microregion with generalized digital speckle correlation method

Xide Li; Bing Deng; Huiji Shi

doi:10.1117/12.468866

29 May 2002 Displacement measurements in microregion with generalized digital speckle correlation method

Xide Li, Bing Deng, Huiji Shi

Proceedings Volume 4537, Third International Conference on Experimental Mechanics; (2002) https://doi.org/10.1117/12.468866
Event: Third International Conference on Experimental Mechanics, 2002, Beijing, China

Abstract

High magnifying optics is now widely used in micro-region imaging, which leads to the special image structures on the recording plane, such as continue-gray distributions, large granules and spread structures. As a result, the deformation analyses are unreliable and divergent by using the conventional speckle correlation methods and these generalized speckle patterns. A new correlation algorithm, high-order gradient digital correlation method, has been proposed in this paper to measure the displacements in a micro-region. The performance of the proposed algorithm is illustrated using the generalized speckle patterns captured from the micro-regions.

Citation Download Citation

Xide Li, Bing Deng, and Huiji Shi "Displacement measurements in microregion with generalized digital speckle correlation method", Proc. SPIE 4537, Third International Conference on Experimental Mechanics, (29 May 2002); https://doi.org/10.1117/12.468866

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