Espace et cinéma 360° :

Recommandation et analyse de sentiments dans un espace latent textuel

Recommender systems were developed to cherry-pick interesting content in an always growing environment to help users discover new products or information that they might like. Traditional collaborative filtering methods mainly focus on the ratings to establish user profiles, ignoring the joint review text. Our work does the opposite. We use the written comments as the primary source of informat...

360 x 360 Mosaics

Current mosaicing methods use narrow field of view cameras to acquire image data. This poses problems when computing a complete spherical mosaic. First, a large number of images are needed to capture a sphere. Second, errors in mosaicing make it difficult to complete the spherical mosaic without seams. Third, with a hand-held camera it is hard for the user to ensure complete coverage of the sph...

3d Reconstruction from 360 X 360 Mosaics 1 3d Reconstruction from 360 X 360 Mosaics

We are studying the geometry of a 360 x 360 mosaic image formation. A 360 x 360 mosaic camera model and a calibration procedure are proposed. It is shown that only one point correspondence is needed in order to acquire epipolarily rectified images. The 360 x 360 mosaic camera model is therefore determined by only one intrinsic parameter. It is shown that the relation between coordinates estimat...

Complexité en espace de l'exploration de graphes

Graph Exploration is a problem motivated by several aspects of theoretical computer science, including logic and computational complexity. It has also numerous applications in robotics. In all these contexts, the amount of memory used by the mobile entity (robot, finite automaton, etc.) performing exploration is a key parameter. In this thesis, we study in depth the space complexity of graph ex...

Système couplé PDP-8/IBM-360 pour l'assemblage et la transmission de programmes