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Now showing 1 - 10 of 13
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    Modelling and Rendering Graphics Scenes Composed of Multiple Volumetric Datasets
    (Blackwell Publishers Ltd and the Eurographics Association, 1999) Leu, Adrian; Chen, Min
    This paper presents a method for modelling graphics scenes consisting of multiple volumetric objects. A two-level hierarchical representation is employed, which enables the reduction of the overall storage consumption as well as rendering time. With this approach, different objects can be derived from the same volumetric dataset, and 2D images can be trivially integrated into a scene. The paper also describes an efficient algorithm for rendering such scenes on ordinary workstations, and addresses issues concerning memory requirements and disk swapping.
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    Book Reviews
    (Blackwell Publishers Ltd and the Eurographics Association, 1999)
    Books reviewed:Arlov, Laura. GUI Design for DummiesLeopoldseder, Hannes and Schopf, Christine (Editors). Cyberarts98Lorentz, H. A. On the Theory of the Reflection and Refraction of LightVince, John. Essential Virtual Reality FastJolion, J.-M. and Kropatsch, W. G. Graph-Based Representations in Pattern RecognitionKokaram, Anil C. Motion Picture Restoration: Digital Algorithms for Artefact Suppression in Degraded Motion Picture Film and Video
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    Modeling and Rendering Escher-Like Impossible Scenes
    (Blackwell Publishers Ltd and the Eurographics Association, 1999) Savransky, Guillermo; Dimerman, Dan; Gotsman, Craig
    Inspired by the drawings of "impossible" objects by artists such as M.C. Escher, we describe a mathematical theory which captures some of the underlying principles of their work. Using this theory, we show how impossible three-dimensional scenes may be modeled and rendered synthetically.
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    Editorial
    (Blackwell Publishers Ltd and the Eurographics Association, 1999) Coquillart, Sabine; Seidel, Hans-Peter
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    Erratum
    (Blackwell Publishers Ltd and the Eurographics Association, 1999)
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    Multiresolution Curve and Surface Representation: Reversing Subdivision Rules by Least-Squares Data Fitting
    (Blackwell Publishers Ltd and the Eurographics Association, 1999) Samavati, Faramarz F.; Bartels, Richard H.
    This work explores how three techniques for defining and representing curves and surfaces can be related efficiently. The techniques are subdivision, least-squares data fitting, and wavelets. We show how least-squares data fitting can be used to "reverse" a subdivision rule, how this reversal is related to wavelets, how this relationship can provide a multilevel representation, and how the decomposition/reconstruction process can be carried out in linear time and space through the use of a matrix factorization.Some insights that this work brings forth are that the inner product used in a multiresolution analysis in uences the support of a wavelet, that wavelets can be constructed by straightforward matrix observations, and that matrix partitioning and factorization can provide alternatives to inverses or duals for building efficient decomposition and reconstruction processes. We illustrate our findings using an example curve, grey-scale image, and tensor-product surface.
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    Calendar of Events
    (Blackwell Publishers Ltd and the Eurographics Association, 1999)
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    Fast Ray Tracing of Implicit Surfaces
    (Blackwell Publishers Ltd and the Eurographics Association, 1999) Sherstyuk, Andrei
    A ray-tracing algorithm is described for rendering implicit surfaces formed with C1-continuous bounded functions f(x, y, z). This class of functions includes such popular implicit models as blobby molecules, metaballs, soft objects and convolution surfaces. The algorithm employs analytical methods only, which makes it fast, robust, and numerically stable.An earlier version of this work was presented at the 3rd International Workshop on Implicit Surfaces held in Seattle in 1998.
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    Eurographics
    (Blackwell Publishers Ltd and the Eurographics Association, 1999)
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    Generic Geometric Programming in the Computational Geometry Algorithms Library
    (Blackwell Publishers Ltd and the Eurographics Association, 1999) Veltkamp, Remco C.
    This paper describes a number of design issues and programming paradigms that affect the development of Cgal, the computational geometry algorithms library. Genericity of the library is achieved by concepts such as templates, iterators, and traits classes. This allows the application programmer to plug in own types of containers and point types, for example. The paper gives an explanation of these concepts and examples of how they are used.