Now showing items 2956-2975 of 5006

    • An O(log N) Parallel Time Exact Hidden-LineAlgorithm 

      Dévai, F. (The Eurographics Association, 1987)
      "Parallel algorithms are given for the exact solution of the hidden-line problem. Most of the parallel algorithms proposed for visibility problems in the literature give approximate solutions. and thus cannot yield an upper ...
    • Object Partitioning Considered Harmful: Space Subdivision for BVHs 

      Popov, Stefan; Georgiev, Iliyan; Dimov, Rossen; Slusallek, Philipp (The Eurographics Association, 2009)
      A major factor for the efficiency of ray tracing is the use of good acceleration structures. Recently, bounding volume hierarchies (BVHs) have become the preferred acceleration structures, due to their competitive performance ...
    • Object Snapping Method using Multi-Resolution Fuzzy Grid Snapping Technique 

      Dematapitiya, Sumudu; Kawazoe, Masatoshi; Khand, Qamar Uddin; Saga, Sato (The Eurographics Association, 2005)
      We propose the automatic snapping of objects using the Multi-resolution Fuzzy Grid Snapping (MFGS) for a sketch based CAD system. The sketch based CAD system, which has already been realized, identifies sketch drawings as ...
    • Objective and Subjective Evaluation of Virtual Relighting from Reflectance Transformation Imaging Data 

      Pintus, Ruggero; Dulecha, Tinsae; Jaspe, Alberto; Giachetti, Andrea; Ciortan, Irina; Gobbetti, Enrico (The Eurographics Association, 2018)
      Reflectance Transformation Imaging (RTI) is widely used to produce relightable models from multi-light image collections. These models are used for a variety of tasks in the Cultural Heritage field. In this work, we carry ...
    • Obscurance-based Volume Rendering Framework 

      Ruiz, M.; Boada, I.; Viola, I.; Bruckner, S.; Feixas, M.; Sbert, M. (The Eurographics Association, 2008)
      Obscurances, from which ambient occlusion is a particular case, is a technology that produces natural-looking lighting effects in a faster way than global illumination. Its application in volume visualization is of special ...
    • Occlusion Culling for Sub-Surface Models in Geo-Scientific Applications 

      Plate, John; Grundhoefer, Anselm; Schmidt, Benjamin; Froehlich, und Bernd (The Eurographics Association, 2004)
      Modern graphics cards support occlusion culling in hardware. We present a three pass algorithm, which makes efficient use of this feature. Our geo-scientific sub-surface data sets consist typically of a set of high resolution ...
    • Occlusion-free Camera Control for Multiple Targets 

      Christie, Marc; Normand, Jean-Marie; Olivier, Patrick (The Eurographics Association, 2012)
      Maintaining the visibility of target objects is a fundamental problem in automatic camera control for 3D graphics applications. Practical real-time camera control algorithms generally only incorporate mechanisms for the ...
    • Ocean Waves Animation using Boundary Integral Equations and Explicit Mesh Tracking 

      Keeler, Todd; Bridson, Robert (The Eurographics Association, 2014)
      We tackle deep water simulation in a scalable way, solving 3D irrotational flow using only variables stored in a mesh of the surface of the water, in time proportional to the rendered mesh. The heart of our method is a ...
    • OCHRE a Powerful Tool for Culture Historical Research - A Chronological Model for Historical Roads and Paths 

      Vletter, Willem (IEEE, 2015)
      In this paper the Online Cultural and Historical Research Environment (OCHRE) will be presented as a tool that facilitates the dating of historical roads and paths. It is makes use of extracted roads and paths from Airborne ...
    • Octree-based Point-Cloud Compression 

      Schnabel, Ruwen; Klein, Reinhard (The Eurographics Association, 2006)
      In this paper we present a progressive compression method for point sampled models that is specifically apt at dealing with densely sampled surface geometry. The compression is lossless and therefore is also suitable for ...
    • Octree-Based Progressive Geometry Coding of Point Clouds 

      Huang, Yan; Peng, Jingliang; Kuo, C.-C. Jay; Gopi, M. (The Eurographics Association, 2006)
      We propose a generic point cloud encoder that compresses geometry data including positions and normals of point samples corresponding to 3D objects with arbitrary topology. In this work, the coding process is led by an ...
    • Octreemizer: A Hierarchical Approach for Interactive Roaming Through Very Large Volumes 

      Plate, John; Tirtasana, Michael; Carmona, Rhadamés; Fröhlich, Bernd (The Eurographics Association, 2002)
      We have developed a hierarchical paging scheme for handling very large volumetric data sets at interactive frame rates. Our system trades texture resolution for speed and uses effective prediction strategies. We have tested ...
    • Olfactory Display: Fluid Dynamic Considerations for Realistic Odor Presentation 

      Matsukura, Haruka; Ishida, Hiroshi (The Eurographics Association, 2009)
      This paper describes some fluid dynamic considerations for attaining realistic odor presentation using an olfactory display. Molecular diffusion is an extremely slow process and, therefore, odor molecules released from ...
    • On Accuracy of Marching Isosurfacing Methods 

      Wang, Cuilan; Newman, Timothy S.; Lee, Jong Kwan (The Eurographics Association, 2008)
      Representational accuracy of the isosurface meshes produced by well-known marching isosurfacing methods is considered. Accuracy is determined versus the isosurface given by trilinear interpolation and quantified using a ...
    • On Ancient Coin Classification 

      Zaharieva, Maia; Huber-Moerk, Reinhold; Noelle, Michael; Kampel, Martin (The Eurographics Association, 2007)
      Illegal trade and theft of coins appears to be a major part of the illegal antiques market. Image based recognition of coins could substantially contribute to fight against it. Central component in the permanent identification ...
    • On Approximation of the Laplace-Beltrami Operator and the Willmore Energy of Surfaces 

      Hildebrandt, Klaus; Polthier, Konrad (The Eurographics Association and Blackwell Publishing Ltd., 2011)
      Discrete Laplace Beltrami operators on polyhedral surfaces play an important role for various applications in geometry processing and related areas like physical simulation or computer graphics. While discretizations of ...
    • On Combining Epigraphy, TLS, Photogrammetry, and Interactive Media for Heritage Documentation: The Case Study of Djehutihotep's Tomb in Dayr al-Barsha 

      Lima, Roberto de; Sykora, Toon; Meyer, Marleen De; Willems, Harco; Vergauwen, Maarten (The Eurographics Association, 2018)
      The governors' tombs located at Dayr al-Barsha are considered among the most important monuments of the Egyptian Middle Kingdom. Unfortunately, due to quarrying activities, looting, and natural catastrophes, the archaeological ...
    • On Creating Animated Presentations 

      Zongker, Douglas E.; Salesin, David H. (The Eurographics Association, 2003)
      Computers are used to display visuals for millions of live presentations each day, and yet only the tiniest fraction of these make any real use of the powerful graphics hardware available on virtually all of today s machines. ...
    • On Discrete Killing Vector Fields and Patterns on Surfaces 

      Mirela Ben-Chen; Adrian Butscher; Justin Solomon; Leonidas Guibas (2010)
      Symmetry is one of the most important properties of a shape, unifying form and function. It encodes semantic information on one hand, and affects the shape's aesthetic value on the other. Symmetry comes in many flavors, ...
    • On Dynamic Load Balancing on Graphics Processors 

      Cederman, Daniel; Tsigas, Philippas (The Eurographics Association, 2008)
      To get maximum performance on the many-core graphics processors it is important to have an even balance of the workload so that all processing units contribute equally to the task at hand. This can be hard to achieve when ...