A5011330750- Computational Geometry and Mesh Generation
- Computer Graphics and Visualization Techniques
- Data Management and Algorithms
- Advanced Numerical Analysis Techniques
- Remote Sensing and LiDAR Applications
- Robotics and Sensor-Based Localization
- 3D Shape Modeling and Analysis
- 3D Modeling in Geospatial Applications
- Facility Location and Emergency Management
- Geographic Information Systems Studies
- Geological Modeling and Analysis
- Coastal and Marine Dynamics
- Coastal wetland ecosystem dynamics
- Robotic Path Planning Algorithms
- Optical measurement and interference techniques
- 3D Surveying and Cultural Heritage
- Additive Manufacturing and 3D Printing Technologies
- Evacuation and Crowd Dynamics
- Quality of Life Measurement
- Electrical and Bioimpedance Tomography
- Geology and Paleoclimatology Research
- Constraint Satisfaction and Optimization
- Manufacturing Process and Optimization
- Vehicle Routing Optimization Methods
- Hand Gesture Recognition Systems
University of Girona
2006-2023
• Physical, chemical and isotopic models indicate the influence of groundwater. Morphological features control water salinity in enclosed coastal lagoons. Saltwater wedge position determines origin inputs During dry seasons, groundwater is responsible for maintenance these Coastal wetlands are among most productive ecosystems world, playing an important role defense wildlife conservation. These ecosystems, however, usually affected by human activities, which may cause a loss degradation...
Cage-based deformation has been one of the main approaches for mesh in recent years, with a lot interesting and active research. The advantages cage-based techniques are their simplicity, relative flexibility, speed. However, to date there no widely accepted solution that provides both user control at different levels detail high-quality deformations. We present *Cages (star-cages), significant step forward respect traditional single-cage coordinate systems, which allows usage multiple cages...
This study provides a system that determines where to locate k disks-like services of radius r so they globally cover as much possible region demand. It is an NP-hard problem with notorious applications in the facility location field when locating multiple warning sirens, cellular towers, radio stations, or pollution sensors covering area city geographical region. The demand assumed be delimited by general polygonal domain, and resolution strategy relies on parallel simulated annealing...
Abstract Visibility computation on terrain models is an important research topic with many applications in Geographical Information Systems. A multi‐visibility map the subdivision of domain a into regions that, according to different criteria, encodes visibility respect set view elements. We present approach for visualising approximated maps triangulated corresponding elements by using graphics hardware. Our method supports heterogeneous sets containing points, segments, polygonal chains and...
We propose a new approach for computing in an efficient way polygonal approximations of generalized 2D/3D Voronoi diagrams. The method supports distinct site shapes (points, line-segments, curved-arc segments, polygons, spheres, lines, polyhedra, etc.), different distance functions (Euclidean distance, convex functions, etc.) and is restricted to diagrams with connected regions. presented constructs tree (a quadtree 2D/an octree 3D) which encodes its nodes compact all the information...
In this paper, we propose a new graphics processing unit (GPU) method able to compute the 2D constrained Delaunay triangulation (CDT) of planar straight-line graph consisting points and segments. All existing methods given point set, insert all segments, then finally transform resulting into CDT. To contrary, our novel approach simultaneously inserts segments triangulation, taking special care avoid conflicts during retriangulations due concurrent insertion or edge flips. Our implementation...
Abstract Scanning and acquisition methods produce highly detailed surface meshes that need multi‐chart parameterizations to reduce stretching distortion. From these complex shape surfaces, high‐quality approximations are automatically generated by using simplification techniques. Multi‐chart textures hinder the quality of techniques for two reasons: either chart boundaries cannot be simplified leading a lack geometric fidelity; or texture distortions artefacts appear near boundaries. In this...
RGB-D sensors can be a low-cost solution for an accurate silo's content monitoring which is fundamental its efficient management. Some reference information such as the position and orientation of sensor with respect to geometry obtaining correct measurements from acquired data. Since in real cases this not always known, new method obtain these proposed. This, taking input data (represented point cloud), automatically computes axis provide system cloud easily processed. The z-axis coincides...
Given a set of irregularly sampled 3D polygonal curves representing composite fibres within micro-computed tomography volume, new approach based on the Frenet–Serret formulas is proposed to measure point curvature and waviness along polyline even when its oscillations are not coplanar. However, direct computation measures would lead ill-formed results depending variant externalities across acquisitions such as noise, sampling, resolution, fractality, etc. Consequentially, we also propose...
Abstract Development of approximation techniques for highly detailed surfaces is one the challenges faced today. We introduce a new mesh structure that allows dense triangular meshes arbitrary topology to be approximated. The constructed from information gathered during simplification process. Each vertex simplified model collects neighbourhood input vertices. Then, each fitted by set local taking into account sharp features detected. plus parameters these surfaces, conveniently stored in...