Journal
STRAIN
Volume 41, Issue 4, Pages 167-175Publisher
BLACKWELL PUBLISHING
DOI: 10.1111/j.1475-1305.2005.00227.x
Keywords
digital image correlation; image processing; in-plane strain measurement
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The performance of four digital image correlation criteria widely used in strain mapping applications has been critically examined using three sets of digital images with various whole-field deformation characteristics. The deformed images in these image sets are digitally modified to simulate the less-than-ideal image acquisition conditions in an actual experiment, such as variable brightness, contrast, uneven local lighting and blurring. The relative robustness, computational cost and reliability of each criterion are assessed for precision strain mapping applications. Recommendations are given for selecting a proper image correlation criterion to efficiently extract reliable deformation data from a given set of digital images.
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