PhD Defense of Helena Martins on 09/26/2018 at 2pm
PhD Defense of Helena MARTINS from BCM team on september, the 26, at 2 pm:
'Statistical Methods to Identify Local Adaptation in Continuous and Admixed Populations'
Place : Maison des Langues, Salle Jacques Cartier, 1141 avenue Centrale, 38400 Saint Martin d'Hères
Thesis supervisor :
- M. Olivier FRANÇOIS, Professeur, Grenoble INP, lab TIMC-IMAG, Director
Jury :
- Mathieu GAUTIER, Chargé de recherche, INRA, Reporter
- Stéphanie MANEL, Directrice d’Etude, CEFE/CNRS, Reporter
- Laurence DESPRES, Professeur, UGA, Examiner
- Yves VIGOUROUX, Directeur de Recherche, IRD, Examiner
- Michael BLUM, Directeur de Recherche, CNRS, Examiner
tomography, data consistency conditions, cone-beam CT, self-calibration
Abstract :
In X-ray transmission imaging, the collected measurements correspond to an integral operator: the Radon transform in parallel geometry and the divergent beam transform in divergent geometry. The range of these operators is characterized by conditions, which help to quantify the consistency of the measured data with the forward integral model.
The first pillar of this PhD work studies range conditions in cone-beam acquisition geometry: we derive new conditions for a planar trajectory and establish a new relation between 2D fanbeam conditions and Grangeat-based conditions.
The second pillar is related to the self-calibration of cone-beam systems. The acquisition geometry of the system is determined from range conditions and a parametric model of the projection geometry.