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Proceedings Paper

Displacement measurements in microregion with generalized digital speckle correlation method
Author(s): Xide Li; Bing Deng; Huiji Shi
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Paper 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.

Paper Details

Date Published: 29 May 2002
PDF: 4 pages
Proc. SPIE 4537, Third International Conference on Experimental Mechanics, (29 May 2002); doi: 10.1117/12.468866
Show Author Affiliations
Xide Li, Tsinghua Univ. (China)
Bing Deng, Tsinghua Univ. (China)
Huiji Shi, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 4537:
Third International Conference on Experimental Mechanics

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