Category Archive: Seminars

Oct 21

Mathieu Desbrun: Power Coordinates. A Geometric Construction of Barycentric Coordinates on Convex Polytopes.

November 10, at 14:15 in room Byron blanc (downstairs) In this talk, we introduce a full geometric parameterization of generalized barycentric coordinates on convex polytopes. We show that these continuous and non-negative coefficients ensuring linear precision can be efficiently and exactly computed through a power diagram of the polytope’s vertices and the evaluation point. In …

Continue reading »

Sep 13

Pierre Alliez: Low Distortion Inter-surface Mapping via Optimal Mass Transport

joint work with Manish Mandad, David Cohen-Steiner, Mathieu Desbrun and Leif Kobbelt. Recent advances based on entropic regularization are unleashing the power of optimal transport. In this talk I will present a novel approach for computing a homeomorphic map between two discrete surfaces. While most previous approaches compose maps over intermediate domains which result in …

Continue reading »

Sep 01

Stefanie Wuhrer: Alignment and Analysis of 3D Human Motion Sequences

Abstract:. In this talk, I will present our recent results related to aligning and analyzing data sequences consisting of 3D frames that capture a surface undergoing a motion. We focus on the motion of human body and face shapes, which are especially important in various applications including tele-presence and design tasks. Aligning these motion sequences, …

Continue reading »

May 31

Jean-Dominique Favreau: Fidelity vs. Simplicity: a Global Approach to Line Drawing Vectorization

Abstract: Vector drawing is a popular representation in graphic design because of the precision, compactness and editability offered by parametric curves. However, prior work on line drawing vectorization focused solely on faithfully capturing input bitmaps, and largely overlooked the problem of producing a compact and editable curve network. As a result, existing algorithms tend to …

Continue reading »

May 30

Dorothy Liuyun Duan: Towards large-scale city reconstruction from satellites

Title: Towards large-scale city reconstruction from satellites Abstract: Automatic city modeling from satellite imagery is one of the biggest challenges in urban reconstruction. Existing methods produce at best rough and dense Digital Surface Models. Inspired by recent works on semantic 3D reconstruction and region-based stereovision, we propose a method for producing compact, semantic-aware and geometrically accurate 3D city models from …

Continue reading »

May 16

Emmanuel Maggiori: Learning an iterative process to enhance satellite image classification maps

Abstract: We address the automatic pixelwise labeling of satellite images with convolutional neural networks. These networks tend to lose spatial precision in the process, outputting coarse classification maps that do not accurately outline the objects. While specific enhancement algorithms have been designed in the literature to improve such coarse neural network outputs, this requires a …

Continue reading »

Sep 29

Nicolas Mellado: Analysis of Point Clouds at Multiple Scales

October 5th 2015, 10:30am in room Byron blanc Abstract: Over the last decades, the evolution of acquisition techniques yields the generalization of detailed 3D objects, represented as large point clouds composed of millions of vertices. The complexity of the involved data often requires to analyze them for the extraction and characterization of pertinent structures, which …

Continue reading »

Sep 08

Max Budninskiy (Caltech): Anisotropic meshing through functional approximation

Abstract: High quality isotropic meshing has been thoroughly studied in the past. Resulting techniques such as Optimal Delaunay Triangulation (ODT) and Centroidal Voronoi Tessellation (CVT) are well understood and widely used in a variety of applications.  However, anisotropic meshing presents a considerably more difficult challenge.  In this talk, we present anisotropic extensions of these high …

Continue reading »

Jun 19

Sven Oesau defense: Modélisation géométrique de scènes intérieures à partir de nuage de points

Résumé: La modélisation géométrique et la sémantisation de scènes intérieures à partir d’échantillon de points et un sujet de recherche qui prend de plus en plus d’importance. Le traitement d’un ensemble volumineux de données est rendu difficile d’une part par le nombre élevé d’objets parasitant la scène et d’autre part par divers défauts d’acquisitions comme …

Continue reading »

Jun 10

Andrei Sharf: Recent Results in 3D Manufacturing

June 23, 2pm in room Byron beige The emergence of 3D printing technology steers the investigation of new geometric problems. In this talk I will introduce three novel results in the realm of 3D printing and design of geometric models. The production cost of 3D printing is directly related to the volume of material effectively …

Continue reading »

Older posts «