Now showing items 1-20 of 47

    • NightLighting: a Nocturnal Urban Illumination Approach 

      Muñoz-Pandiella, Imanol; Andújar, Carlos; Patow, Gustavo (The Eurographics Association, 2013)
      Real time rendering of cities with realistic global illumination is still an open problem. In this paper we propose a two-step algorithm to simulate the nocturnal illumination of a city. The first step computes an approximate ...
    • Challenges in Procedural Modeling of Buildings 

      Patow, Gustavo; Besuievsky, Gonzalo (The Eurographics Association, 2013)
      The use of procedural modeling for building generation has risen dramatically over the last years, being an elegant and fast way to generate huge, complex and realistically looking urban sites. However, due to its generative ...
    • A General Strategy for Semantic Levels of Detail Visualization in Urban Environment 

      Zhang, Fan; Tourre, Vincent; Moreau, Guillaume (The Eurographics Association, 2013)
      Applications based on urban environments are applied frequently in daily life which increases the needs for a high quality visualization result. It combines the urban environment and the special application-related topic ...
    • Inverse-Procedural Methods for Urban Models 

      Musialski, Przemyslaw; Wimmer, Michael (The Eurographics Association, 2013)
      Procedural modeling is an elegant and fast way to generate huge complex and realistically looking urban sites. Due to its generative nature it can also be referred to as forward-procedural modeling. Its major drawback is ...
    • Challenges and Ideas in Procedural Modeling of Interiors 

      Ilcik, Martin; Wimmer, Michael (The Eurographics Association, 2013)
      While the creation of convincing cityscapes from the outside is already possible, there is a lack of robust and efficient techniques for modeling the interior of buildings. In particular, we focus on challenges for the ...
    • Understanding City Dynamics through Spatio-temporal Visualization 

      Dias, Luís; Silva, Nelson; Cardoso, Tiago; Fonseca, Manuel J. (The Eurographics Association, 2013)
      Every time we visit a new city there is a huge effort made in understanding its dynamic, i.e. what are the relevant locations within that city in each time period, for there are large amounts of data to sift through. ...
    • Toward Automated Façades Generation from Oblique Aerial Images 

      Vahl, Matthias; Lukas, Uwe von (The Eurographics Association, 2013)
      In this paper we introduce an approach for automatic recognition and description of building façades from oblique aerial images. This approach does not use street-side images, like Google StreetView, but aerial images to ...
    • Online Reconstruction of Textured Triangle Meshes from Aerial Images 

      Vierjahn, Tom; Roters, Jan; Moser, Manuel; Hinrichs, Klaus; Mostafawy, Sina (The Eurographics Association, 2013)
      In this paper we present and evaluate a new online reconstruction algorithm to create a textured triangle mesh from a set of aerial images via an unorganized point cloud. Both the point cloud and the mesh are iteratively ...
    • Indoor Scene Reconstruction using Primitive-driven Space Partitioning and Graph-cut 

      Oesau, Sven; Lafarge, Florent; Alliez, Pierre (The Eurographics Association, 2013)
      We present a method for automatic reconstruction of permanent structures of indoor scenes, such as walls, floors and ceilings, from raw point clouds acquired by laser scanners. Our approach employs graph-cut to solve an ...
    • Taking Advantage of Low Radiative Coupling in 3D Urban Models 

      Beckers, Benoit (The Eurographics Association, 2013)
      We examine different techniques able to enhance the efficiency of urban simulations. Condensation techniques like superelements - well known in the finite element community - are good candidates to improve the heat transfers ...
    • Dual-Domain Visual Exploration of Urban Solar Potential 

      Seipel, Stefan; Lingfors, David; Widén, Joakim (The Eurographics Association, 2013)
      Traditional methods for estimating the solar energy potential in buildings determine energy yields on an annual base and make use of highly aggregated geo-spatial data. This work proposes a method for detailed assessment ...
    • Interactive Techniques for Populating Large Virtual Cities 

      Jordao, Kevin; Pettré, Julien; Cani, Marie-Paule (The Eurographics Association, 2013)
      For many applications, exploring empty virtual cities is not sufficient: streets and squares need to be populated by crowds of virtual humans. This position paper addresses the problem of generating such crowds when the ...
    • Topological Reconstruction of Complex 3D Buildings and Automatic Extraction of Levels of Detail 

      Diakité, Abdoulaye A.; Damiand, Guillaume; Maercke, Dirk Van (The Eurographics Association, 2014)
      This paper describes a new method allowing to retrieve the indoor and outdoor topology of a detailed 3D building model from its geometry and to extract different levels of detail (LoD) from the resulting topological ...
    • Visualizing Street Orientation and Solar Radiation in Relation to Complex Topography 

      Mohajeri, Nahid; Gudmundsson, Agust; Kämpf, Jérôme H.; Scartezzini, Jean Louis (The Eurographics Association, 2014)
      Street networks can be visualized in various ways depending on the purpose. Here we introduce (in the present context) a new technique for visualizing the orientation of street networks in relation to complex topography. ...
    • Hierarchical Radiosity for Procedural Urban Environments 

      Roure, Ferran; Besuievsky, Gonzalo; Patow, Gustavo (The Eurographics Association, 2014)
      In this paper we present a novel solution for the computation of diffuse global illumination in urban environments that takes advantage of the underlying structure of the procedural building models used for generating the ...
    • Ground Temperature Modelling: The Case Study of Rue des Maraîchers in Geneva 

      Upadhyay, Govinda; Kämpf, Jérôme; Scartezzini, Jean Louis (The Eurographics Association, 2014)
      This paper presents a methodology to approximate the urban heat island effect by using a PostgreSQL database and CitySim software, a simulation tool to evaluate urban energy flows. A ground temperature model has been ...
    • Applying Level-of-detail and Perceptive Effects to 3D Urban Semantics Visualization 

      Zhang, Fan; Tourre, Vincent; Moreau, Guillaume (The Eurographics Association, 2014)
      Urban environment consists of various types of data, both geometric ones and non-geometric ones, among which urban semantics are important sources for non-geometric data. The modelling and visualization of urban semantics ...
    • A Configurable LoD for Procedural Urban Models intended for Daylight Simulation 

      Besuievsky, Gonzalo; Barroso, Santiago; Beckers, Benoit; Patow, Gustavo (The Eurographics Association, 2014)
      In many applications, such as in massive urban models visualization or in the study of the impact of urban simulation at different scales, models with different levels of detail are required. In this paper we propose a ...
    • Incremental Plane-based Reconstruction and Exploration of Buildings in old Postcards 

      Younes, Lara; Romaniuk, Barbara; Bittar, Eric (The Eurographics Association, 2014)
      We present an approach for 3D reconstruction of a city model over the time from a collection of old postcards of the city of Reims. The planar structure of the buildings façades constraints the dense reconstruction of the ...
    • Managing Temporal Change of Cities with CityGML 

      Morel, Maxime; Gesquière, Gilles (The Eurographics Association, 2014)
      An increasing number of cities are developing digital models. It becomes thus necessary to take into account changes over time. Interoperability and thus the use of standards is also recommended. In this paper, we propose ...