Abstract
To compensate bad quality of speckles pattern or on increase the spacial resolution by decreasing the element size, finite based DIC often requires a additional regularization. Usually the regularization introduce a cut-off length below which the wave length of the measured displacement are filtered. While this might improve the measurement for low frequency displacement to be measure, discontinuities are artificially smoothed what may be detrimental for the analysis of cracks. To circumvent this drawback, a new regularization strategy using the median filter during the optimization process is proposed and compared with the other classical regularizations on perfect discontinuity in order to illustrate the effect of regularization on crack.
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References
Barnea, D.I., Silverman, H.: A class of algorithms for fast digital image registration computers. IEEE Trans. Comput. C-21, 179–186 (1972)
Sutton, M., Wolters, W., Peters, W., Ranson, W., McNeill, S.: Determination of displacements using an improved digital correlation method. Image Vis. Comput. 1, 133–139 (1983)
Lucas, B.D., Kanade, T.: An iterative image registration technique with an application to stereo vision IJCAI81, pp. 674–679. ACM, New York (1981)
Besnard, G., Hild, F., Roux, S.: “Finite-element” displacement fields analysis from digital images: application to Portevin–Le Châtelier bands. Exp. Mech. 46(6), 789–803 (2006)
Leclerc, H., et al.: Voxel-scale digital volume correlation. Exp. Mech. 51(4), 479–490 (2011)
Cachier, P., Bardinet, E., Dormont, D., Pennec, X., Ayache, N.: Iconic feature based nonrigid registration: the PASHA algorithm. Comput. Vis. Image Understand. 89, 272–298 (2003)
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The support of ADEME through grant Cervifer and Région Pays de la Loire through grant MatSyMat, labelled by EMC2, are gratefully acknowledged.
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© 2017 The Society for Experimental Mechanics, Inc.
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Witz, JF., Réthoré, J., Hosdez, J. (2017). Regularization Techniques for Finite Element DIC. In: Sutton, M., Reu, P. (eds) International Digital Imaging Correlation Society. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51439-0_33
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DOI: https://doi.org/10.1007/978-3-319-51439-0_33
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