Journal
OPTICS AND LASER TECHNOLOGY
Volume 43, Issue 1, Pages 9-13Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2010.04.010
Keywords
Speckle pattern; Digital image correlation; Mean subset fluctuation
Categories
Funding
- National Basic Research Program of China [2010CB631005]
- National Natural Science Foundation of China [10625209, 10732080, 90916010]
- Beijing Natural Sciences Foundation [3072007]
- Specialized Research Fund for the Doctoral Program of Higher Education [20090002110048]
- State Key Laboratory of Explosion Science and Technology
- RAE fellowship in UK
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The quality of the speckle pattern used in digital image correlation is studied in this paper using a parameter called mean subset fluctuation. A numerical translation test is performed on four speckle patterns captured from actual experiments The translated images are analyzed and the results show that the mean bias error of the calculated displacement is linear with the value of the mean subset fluctuation The results from the numerical calculation illustrate that speckle size and density have an influence on the quality of speckle pattern (C) 2010 Elsevier Ltd. All rights reserved
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