TY - GEN
T1 - Study and generation of optimal speckle patterns for DIC
AU - Lecompte, David
AU - Bossuyt, S.
AU - Cooreman, S.
AU - Sol, H.
AU - Vantomme, J.
PY - 2007
Y1 - 2007
N2 - Digital Image Correlation (DIC) - also referred to as white light speckle technique - is an optical-numerical full-field measuring technique, which offers the possibility to determine in-plane displacement fields at the surface of objects under any kind of loading. For an optimal use of the method, the object of interest has to be covered with a speckle pattern. The present paper studies the efficiency of a random speckle pattern and its influence on the measured in-plane displacements with respect to the subset size. Four different speckle patterns are selected with different speckle sizes and spectral content. Subsequently, each speckle pattern image undergoes a numerically controlled deformation, which is measured with digital image correlation software. Both imposed and measured displacements are compared and it is shown that the size of the speckles and its spectral content combined with the size of the used pixel subset, clearly influences the accuracy of the measured displacements.
AB - Digital Image Correlation (DIC) - also referred to as white light speckle technique - is an optical-numerical full-field measuring technique, which offers the possibility to determine in-plane displacement fields at the surface of objects under any kind of loading. For an optimal use of the method, the object of interest has to be covered with a speckle pattern. The present paper studies the efficiency of a random speckle pattern and its influence on the measured in-plane displacements with respect to the subset size. Four different speckle patterns are selected with different speckle sizes and spectral content. Subsequently, each speckle pattern image undergoes a numerically controlled deformation, which is measured with digital image correlation software. Both imposed and measured displacements are compared and it is shown that the size of the speckles and its spectral content combined with the size of the used pixel subset, clearly influences the accuracy of the measured displacements.
UR - http://www.scopus.com/inward/record.url?scp=36048959193&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:36048959193
SN - 1604232226
SN - 9781604232226
T3 - Proceedings of the SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007
SP - 1643
EP - 1649
BT - Proceedings of the SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007
T2 - SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007
Y2 - 3 June 2007 through 6 June 2007
ER -