Shape determination of unidimensional objects: the virtual image correlation method
Laboratoire FAST, Universite Paris Sud XI,
a e-mail: firstname.lastname@example.org
The proposed method, named Virtual Image Correlation, allows one to identify an analytical expression of the shape of a curvilinear object from its image. It uses a virtual beam, whose curvature ﬁeld is expressed as a truncated mathematical series. The virtual beam width only needs to be close to the physical one; its gray level (in the transverse direction) is bell-shaped. The method consists in ﬁnding the coeﬃcients of the series for which the correlation between physical and virtual beams is the best. The accuracy and the robustness of the method is shown by the mean of two examples. The ﬁrst details a Young’s modulus identiﬁcation from a cantilever beam image. The second is relative to a thermal plume image, that have a weak contrast and a lot of noise.
© Owned by the authors, published by EDP Sciences, 2010