Cardiologists assume that analysis of the motion of the heart (especially the left ventricle) can give precise information about the health of the myocardium. A 4D polar transformation is deened to describe the left ventricle (LV) motion and a method is presented to estimate it from sequences of 3D images. The transformation is deened in 3D-planispheric coordinates by a small number of paramete...

Partie I les expériences françaises et sud‐africaines dans le mouvement universel de recomposition territoriale

Our purpose is to investigate properties for processes with stationary and independent increments under G-expectation. As applications, we prove the martingale characterization of G-Brownian motion and present a pathwise decomposition theorem for generalized G-Brownian motion. Résumé. Notre but est d’étudier des propriétés de processus à accroissements stationnaires et indépendants sous une G-e...

We consider the motion of a rigid body immersed in an incompressible perfect fluid which occupies a threedimensional bounded domain. For such a system the Cauchy problem is well-posed locally in time if the initial velocity of the fluid is in the Hölder space C. In this paper we prove that the smoothness of the motion of the rigid body may be only limited by the smoothness of the boundaries (of...

This report describes a parametric motion model estimation algorithm. Motivations for the use of such models are, on one hand, their representativeness, which has proved to be eecient in numerous issues such as measurement, segmentation, tracking and interpretation of motion, on the other hand, their compactness and, therefore, the low computational cost of the estimation of these models. Howev...

This paper describes an original approach which jointly addresses two fundamental issues of video partitioning which represent the early important stage of any content-based video indexing system. These two issues are the detection of shot changes, and the labeling of the shot connguration related to the camera movement in terms of static shot, panning, traveling, zooming,... They are both deri...

We are concerned with the spatio-temporal analysis of 2D uid motion from numerical images. The interpretation of such deformable ow elds can be derived from the characterization of linear motion models provided that rst order approximations are considered in an adequate neighborhood of so-called singular points where the velocity becomes null. However, locating such points, delimiting this neig...

Cette thèse porte sur un problème de calibration d’un modèle électromécanique de cœur, personnalisé à partir de données d’imagerie médicale 3D + t ; et sur celui — en amont — de suivi du mouvement cardiaque. Les perspectives à long terme de la simulation personnalisée de la fonction cardiaque incluent l’aide au diagnostic et à la planification de thérapie, ainsi que la prévention des risques ca...