3D Shape Cropping

International audienceWe introduce shape cropping as the segmentation of a bounding geometry of an object as observed by sensors with different modalities. Segmenting a bounding volume is a preliminary step in many multi-view vision applications that consider or require the recovery of 3D information, in particular in multi-camera environments. Recent vision systems used to acquire such information often combine sensors of different types, usually color and depth sensors. Given depth and color images we present an efficient geometric algorithm to compute a polyhedral bounding sur- face that delimits the region in space where the object lies. The resulting cropped geometry eliminates unwanted space regions and enables the initialization of further processes including surface refinements. Our approach ex- ploits the fact that such a region can be defined as the intersection of 3D regions identified as non empty in color or depth images. To this purpose, we propose a novel polyhedron combination algorithm that overcomes compu- tational and robustness issues exhibited by traditional intersection tools in our context. We show the correction and effectiveness of the approach on various combination of inputs

Introduction

De la belgitude Notre intérêt pour la thématique des stéréotypes et de l’intimité culturelle doit autant à nos propres recherches en Afrique et en Asie qu’à notre expérience vécue en Belgique. Curieusement, peu de travaux ont été consacrés aux catégories d’appartenance au quotidien dans ce pays. Une ligne de partage semble assigner l’étude des groupes issus de l’immigration aux sociologues et anthropologues, et celle de l’identité nationale (ou régionale) aux politologues et historiens. Or, l..

Introduction

De la belgitude Notre intérêt pour la thématique des stéréotypes et de l’intimité culturelle doit autant à nos propres recherches en Afrique et en Asie qu’à notre expérience vécue en Belgique. Curieusement, peu de travaux ont été consacrés aux catégories d’appartenance au quotidien dans ce pays. Une ligne de partage semble assigner l’étude des groupes issus de l’immigration aux sociologues et anthropologues, et celle de l’identité nationale (ou régionale) aux politologues et historiens. Or, l..

Neuromodulation by Mechanical Strain in C. elegans

Current computational models for traumatic brain injury are limited by a lack of understanding of the changes in neuronal function following repeated strain, highlighting the need for large datasets characterizing neuronal response to stretch. To provide a platform capable of gathering these datasets, an apparatus to strain embedded neuronal samples and monitor the subsequent neural response optogenetically was developed. The apparatus enables loading and immobilization of live Caenorhabditis elegans specimen, delivers stretch stimulus to the embedded animals, and provides sufficient image resolution to analyze neuronal calcium activity fluorescently both pre- and post-stretch

The Virtualization Gate Project

Ercim News 80International audienceThe Vgate project introduces a new type of immersive environment that allows full-body immersion and interaction with virtual worlds. The project is a joint initiative between computer scientists from research teams in computer vision, parallel computing and computer graphics at the INRIA Grenoble Rhone-Alpes, and the 4D View Solutions company