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- Hugo Leclerc, Jean-Noël Périé, Stéphane Roux, François Hild
- MIRAGE
- 2009

Digital Image Correlation (DIC) is a powerful technique to provide full-field displacement measurements for mechanical tests of materials and structures. The displacement fields may be further processed as an entry for identification procedures giving access to parameters of constitutive laws. A new implementation of a Finite Element based Integrated… (More)

- Jean Noël Périé, Hugo Leclerc, Stéphane Roux, François Hild
- 2009

The purpose of the work is to extend the use of non conventional tests and full field measurements to the identification of an anisotropic damage law. A Digital Image Correlation technique based on a finite element discretization is used to extract planar displacement fields. The reconditioned Equilibrium Gap Method is then used to retrieve a damage law… (More)

- Hugo Leclerc, Jean-Noel Périé, François Hild, Stéphane Roux, Jean-Noël Périé
- 2017

Most of the norms used in the eld of digital image (and volume) correlation to register two images (or volumes) lead to ill-posed problems. One of the frequent solutions is to enforce a restricted kinematics requiring a compromise between the richness of the solution (i.e., the spatial resolution) and the measurement uncertainty. An alternative route is to… (More)

- Hugo Leclerc, Jean-Noel Périé, Stéphane Roux, François Hild, Jean-Noël Périé
- 2017

Among various correlation techniques to find the displacement field of a volume imaged by X-Ray tomography at several deformation states, a new approach is proposed where the displacement is measured down to the voxel scale and determined from a mechanically regularized system using the equilibrium gap method, and an additional boundary regularization. It… (More)

- Gilles Besnard, Hugo Leclerc, François Hild, Stéphane Roux, Nicolas Swiergiel
- 2012

Most often, Digital Image Correlation (DIC) is used to analyze a sequence of images. Exploitation of an expected temporal regularity in the displacement fields can be used to enhance the performances of a DIC analysis, either in terms of spatial resolution, or in terms of uncertainty. A general theoretical framework is presented, tested on artificial and… (More)

- Stéphane Roux, Hugo Leclerc, François Hild
- Journal of Mathematical Imaging and Vision
- 2013

Tomographic reconstruction of a binary image from few projections is considered. A novel heuristic algorithm is proposed, the central element of which is a nonlinear transformation ψ(p)=log(p/(1−p)) of the probability p that a pixel of the sought image be 1-valued. It consists of backprojections based on ψ(p) and iterative corrections. Application of this… (More)

Most of the norms used in the eld of digital image (and volume) correlation to register two images (or volumes) lead to ill-posed problems. One of the frequent solutions is to enforce a restricted kinematics requiring a compromise between the richness of the solution (i.e., the spatial resolution) and the measurement uncertainty. An alternative route is to… (More)

- François Hild, Amine Bouterf, +6 authors Stéphane Roux
- Adv. Model. and Simul. in Eng. Sciences
- 2016

Background: The goal of the present study is to illustrate the full integration of sensor and imaging data into numerical procedures for the purpose of identification of constitutive laws and their validation. The feasibility of such approaches is proven in the context of in situ tests monitored by tomography. The bridging tool consists of spatiotemporal… (More)

- Hugo Leclerc
- La Presse médicale
- 1952

The binary tomographic reconstruction problem consists of finding a binary image from (very) few projections (line sum of pixels) along given directions [1]. An efficient heuristic algorithm is introduced [2]. The first (initialization) step is similar to the traditional “filtered backprojection” algorithm used for standard tomographic reconstructions, but… (More)

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