Origami #

Origami is a research team at the LIRIS laboratory in Lyon, France. Its scientific themes cover a broad spectrum of the GDR “Geometric and Graphic Computing, Virtual Reality and Visualization” (IG-RV), which can be grouped into 2 axes:

3D analysis and modeling: Geometry lies at the core of 3D graphics, describing shapes for artistic, industrial, or topological purposes. These shapes come from 3D scans, modeling, or physical simulations and are represented as meshes, point clouds, grids, or implicit forms. Origami develops tools to analyze and manipulate these geometries—curvature analysis, plane detection, metric computation, skeletonization, and topological analysis. These tools help simplify or refine meshes for artistic or mechanical use. The team also contributes to topological editing using combinatorial maps. Additionally, they create 3D tools for procedural landscape generation and local mesh editing, such as hole repair, biomechanical deformation, or animation.
Interaction, visualization and simulation: Origami aims to visualize and interact with simulated, created, or captured data, using real-time rendering, physical simulation, and visualization tools. The team explores multisensory virtual and augmented reality, especially at the Centrale Lyon ENISE site. Their work includes studying visual perception of materials and media, focusing on compression, simplification, and physiological impact (e.g., emotions, hunger). They also process and visualize urban data at various scales, from heritage sites like Notre-Dame to entire cities like Greater Lyon. Origami develops 3D rendering tools (single and multi-view), improves Monte Carlo sampling for realistic lighting via optimal transport and matrix methods, and creates real-time biomechanical simulations with haptic feedback for medical training.