Sontheimer A., Pontier B., Coste J., Roche B., Gillart T., Gabrillargues J., Lemaire J.-J. (2012) Selective cerebral response to autobiographical memory in the permanent vegetative state : a fMRI case study (poster) - 1st International Symposium on Deep Brain Connectomics (September 29-30, 2012, Clermont-Ferrand, France)
In this talk, I will first present an approach to the PnP problem -the
estimation of the pose of a calibrated camera from n point correspondences
between an image and a 3D model- whose computational complexity grows
linearly with n. Our central idea is to express the 3D points as a weighted
sum of four virtual control points. The problem then reduces to estimating
the coordinates of these control points in the camera referential, which can
be done in O(n) using simple linearization techniques. I will then show that
the same type of approach can be applied to register non-rigid 3D surfaces.
However, since monocular non-rigid reconstruction is severely
under-constrained we will have to consider additional constraints, either
based on local rigidity (to reconstruct deformable and inextensible
surfaces), or based on shading coherence (to reconstruct deformable and
In the final part of the talk, I will discuss the major limitations of these
linear formulations and propose a novel and alternative stochastic
exploration strategy. I will present results both for non-rigid shape and
human pose recovery.
Professor Richard Hartley is head of the computer vision group in the Department of Information Engineering, at the Australian National University, where he has been since January, 2001. He is also the Program Leader for the Autonomous Systems and Sensor Technology Program of National ICT Australia, a research centre set up in 2002 with funding from the Australian Government. Dr. Hartley worked at the General Electric Research and Development Center from 1985 to 2001. During the period 1985-1988, he was involved in the design and implementation of Computer-Aided Design tools for electronic design and created a very successful design system called the Parsifal Silicon Compiler. In 1991 he was awarded GE’s Dushman Award for this work. He became involved with Image Understanding and Scene Reconstruction working with GE’s Simulation and Control Systems Division. This division built large-scale flight-simulators. Dr. Hartley’s projects in this area were in the construction of terrain models and texture mosaics from aerial and satellite imagery. This involved research in camera modelling, stereo matching and scene reconstruction. In 1991, he began an extended research effort in the area of applying projective geometry techniques to reconstruction using calibrated and semi-calibrated cameras. This research direction was one of the dominant themes in computer vision research throughout the 1990s. In 2000, he co-authored (with Andrew Zisserman) a book for Cambridge University Press, summarizing the previous decade’s research in this area. From 1995 he was GE project leader for a shared-vision project with Lockheed-Martin involving design and implementation of algorithms for an AFIS (fingerprint analysis) system being developed under a Lockheed-Martin contract with the FBI. This involved work in feature extraction, interactive fingerprint editing and fingerprint database matching. He also investigated application of fingerprint scanners to point of sale systems. Under this contract he also led work on applications of DNA database technology.
More details on the webpage of the event.
La création de l’UMR 6284 CNRS ISIT (Institut des Sciences de l'Image pour les Techniques interventionnelles) a été obtenue au 1er janvier 2012.
Son inauguration se tiendra le vendredi 14 septembre 2012 à partir de 13 heures à l'Institut d'Auvergne du Développement des Territoires (IADT - 51 Boulevard François Mitterrand) à Clermont-Ferrand.
Shah A., Coste J., Gmünder D., Ulla M., Lemaire J.-J., Schkommodau E., Hemm-Ode S. (2012) Quantitative rigidity and tremor evaluation using accelerometer during deep brain stimulation surgery - a preliminary study (poster) – 20th Congress of the European Society for Stereotactic and Functional Neurosurgery. (September 26-29, 2012, Lisbon, Portugal)