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Shape Modeling International, 2002. Proceedings

Date 17-22 May 2002

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Displaying Results 1 - 25 of 36
  • Proceedings SMI. Shape Modeling International 2002

    Publication Year: 2002
    Request permission for commercial reuse | PDF file iconPDF (187 KB)
    Freely Available from IEEE
  • Author index

    Publication Year: 2002, Page(s): 279
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    Freely Available from IEEE
  • Multiresolution tetrahedral meshes: an analysis and a comparison

    Publication Year: 2002, Page(s):83 - 91
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (457 KB) | HTML iconHTML

    We deal with the problem of analyzing and visualizing large-size volume data sets. To this aim, we consider multiresolution representations based on a decomposition of the field domain into tetrahedral cells. We compare two types of multiresolution representations that differ on the rule applied to refine an initial coarse mesh: one is based on tetrahedron bisection, and one based on vertex split.... View full abstract»

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  • Modeling with spatial patches

    Publication Year: 2002, Page(s):75 - 82
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB) | HTML iconHTML

    Spatial patches have been introduced (Ivanov and Kuzmin, 2001) as an alternative primitive for the representation of 3D objects potentially acquired from real life. Defined as range images of small regions of an object's surface, they have proven to allow for efficient storage and rendering of such surfaces, and they also exhibit great descriptive capabilities. We present several technologies that... View full abstract»

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  • Local subdivision process with Doo-Sabin subdivision surfaces

    Publication Year: 2002, Page(s):7 - 12
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (765 KB) | HTML iconHTML

    One problem in subdivision surfaces is that the number of meshes grows quickly after every subdivision step, and a surface with a huge number of meshes is difficult to manipulate. In this paper, an adaptive process for carrying out local subdivision with a Doo-Sabin recursive subdivision surface is presented. With this process, we can create Doo-Sabin surfaces that are more densely subdivided in a... View full abstract»

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  • Processing irregular meshes

    Publication Year: 2002, Page(s):157 - 158
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (187 KB) | HTML iconHTML

    Most meshes are usually produced with both topological and geometrical irregularity (arbitrary valence, non-uniform sampling). This has been seen as a flaw hindering subsequent mesh processing, because most of the other signals we manipulate everyday (sound, image, video) are acquired and processed as regularly sampled data. Three-dimensional (3D) signals, be they surfaces or volumes, are however ... View full abstract»

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  • Mapping independent triangulation of parametric surfaces

    Publication Year: 2002, Page(s):67 - 73
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (734 KB) | HTML iconHTML

    Typical methods for the triangulation of parametric surfaces use a sampling of the parameter space, and the wrong choice of parameterization can spoil a triangulation or even cause the algorithm to fail. We present a new method that uses a local tessellation primitive for almost-uniformly sampling and triangulating a surface, so that its parameterization becomes irrelevant. If sampling density or ... View full abstract»

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  • Geometric modeling without coordinates and indices (extended abstract)

    Publication Year: 2002, Page(s):3 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB) | HTML iconHTML

    Summary form only given. We focus on dynamic geometric objects, which can be seen to develop over time. Examples include fractals, subdivision curves and surfaces, and models of growing biological structures. Coordinates and indices do not identify elements of these objects in a convenient, time-invariant way. For instance, the coordinates of a cell in a growing biological tissue may change over t... View full abstract»

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  • A shape deformation tool to model character lines in the early design phases

    Publication Year: 2002, Page(s):165 - 172
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB) | HTML iconHTML

    This paper addresses the designers' work and in particular the way they express an object shape through character lines. Based on this concept, a deformation feature is presented. The proposed approach includes curvilinear constraints to match the designer's requirements and techniques for the quality and accuracy of the produced model. This method is applied to B-spline surfaces coupled with a me... View full abstract»

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  • A model representation for solid modelling in a virtual reality environment

    Publication Year: 2002, Page(s):183 - 190
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB) | HTML iconHTML

    With today's virtual reality systems, it is difficult to directly and precisely create and modify complex objects in a virtual reality environment. One of the most important reasons is the absence of a suitable model representation that can efficiently support solid modelling in a virtual reality environment. A hierarchically structured constraint-based data model for solid modelling in the virtua... View full abstract»

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  • Triquadratic reconstruction for interactive modelling of potential fields

    Publication Year: 2002, Page(s):145 - 153
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (522 KB) | HTML iconHTML

    We present a data structure for three-dimensional fields C1 continuous in the modelling space. Regular grids storing the field values discretely are combined with a triquadratic approximation filter to define volume objects. This association of a grid and an approximation/interpolation filter allows the field to be defined by a C 1 continuous real function and the surface to... View full abstract»

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  • Using particles to sample and control more complex implicit surfaces

    Publication Year: 2002, Page(s):129 - 136
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB) | HTML iconHTML

    In 1994, Witkin and Heckbert developed a method for interactively modeling implicit surfaces by simultaneously constraining a particle system to lie on an implicit surface and vice-versa. This interface was demonstrated to be effective and easy to use on example models containing a few blobby spheres and cylinders. This system becomes much more difficult to implement and operate on more complex im... View full abstract»

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  • Developing surfaces

    Publication Year: 2002, Page(s):253 - 260
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1123 KB) | HTML iconHTML

    To transform a three-dimensional object or map texture to its surface, it is necessary to introduce a coordinate system. If the surface can be cut and developed, it is easy to identify each point on the surface with the coordinate values. According to a theory in topology, any closed polygonized two-dimensional surface can be represented by a canonical development. However, no efficient algorithm ... View full abstract»

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  • Implicit surfaces for dynamic growth of digestive system

    Publication Year: 2002, Page(s):111 - 117
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1294 KB) | HTML iconHTML

    The embryologists found realistic human organ models and animations of development necessary for their studies. The aim of this paper is to present a methodology producing realistic animations of development. The convolution surfaces generated by skeletons used for model representation are suitable for growth animation. The skeleton of a digestive system is a line skeleton with a tree structure. T... View full abstract»

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  • Spanning tree seams for reducing parameterization distortion of triangulated surfaces

    Publication Year: 2002, Page(s):61 - 68
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (924 KB) | HTML iconHTML

    Providing a two-dimensional parameterization of three-dimensional tessellated surfaces is beneficial to many applications in computer graphics, finite-element surface meshing, surface reconstruction and other areas. The applicability of the parameterization depends on how well it preserves the surface metric structures (angles, distances, areas). For a general surface there is no mapping which ful... View full abstract»

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  • Simple manifolds for surface modeling and parameterization

    Publication Year: 2002, Page(s):237 - 244
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (437 KB) | HTML iconHTML

    We present a surface modeling technique using manifolds. Our approach uses a single, simple parameterization for all surfaces of a given genus. This differs from previous approaches which build a parameterization based on the elements of a mesh. The simple parameterization is more appropriate for applications that perform complex operations in parameter space or on the mesh surface. We define a ma... View full abstract»

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  • A multiresolution mesh generation approach for procedural definition of complex geometry

    Publication Year: 2002, Page(s):35 - 43
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB) | HTML iconHTML

    As a general approach to procedural mesh definition we propose two mechanisms for mesh modification: generalized subdivision and rule based mesh growing. In standard subdivision, a specific subdivision rule is applied to a mesh to get a succession of meshes converging to a limit surface. A generalized approach allows different subdivision rules at each level of the subdivision process. By limiting... View full abstract»

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  • Procedural approach to generate real time motions of cloth

    Publication Year: 2002, Page(s):213 - 217
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB) | HTML iconHTML

    The deformation of cloth is one of the essential aspects to increase the sense of reality in the area of VR (Virtual Reality) or game programming. In contrast, when a character wearing clothes or hanging a flag moves abruptly and rapidly, it is not easy to express the natural movement of the cloth in a limited time. In this paper, the position-based approximation method that considers the nonlinea... View full abstract»

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  • Bounded blending operations

    Publication Year: 2002, Page(s):95 - 103
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1840 KB) | HTML iconHTML

    New analytical formulations of bounded blending for functionally defined set-theoretic operations are proposed. The blending set operations are defined using R-functions and displacement functions with the localized area of influence. The shape and location of the blend is defined by control points on the surfaces of two solids or by an additional bounding solid. The proposed blending using a boun... View full abstract»

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  • A corner-cutting scheme for hexagonal subdivision surfaces

    Publication Year: 2002, Page(s):13 - 20
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (738 KB) | HTML iconHTML

    In their paper about how the duality between subdivision surface schemes leads to higher-degree continuity, Zorin and Schroder (2001) consider only quadrilateral subdivision schemes. The dual of a quadrilateral scheme is again a quadrilateral scheme, while the dual of a triangular scheme is a hexagonal scheme. In this paper we propose such a hexagonal scheme, which can be considered a dual to Kobb... View full abstract»

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  • Mapping conversations: art and understanding

    Publication Year: 2002, Page(s): 161
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (174 KB) | HTML iconHTML

    First Page of the Article
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  • Volume sculpting using the level-set method

    Publication Year: 2002, Page(s):175 - 182
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (705 KB) | HTML iconHTML

    In this paper, we propose the use of the level-set method as the underlying technology of a volume sculpting system. The main motivation is that this leads to a very generic technique for deformation of volumetric solids. In addition, our method preserves a distance field volume representation. A scaling window is used to adapt the level-set method to local deformations and to allow the user to co... View full abstract»

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  • A control of smooth deformations with topological change on a polyhedral mesh based on curves and loops

    Publication Year: 2002, Page(s):191 - 198
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1150 KB) | HTML iconHTML

    We propose a method to model and control topological changes by a smooth deformation of a polyhedral mesh using curves and loops. As changing the genus of a surface is not a continuous transformation, the topological change is made when an intermediate shape between the two topologies has been obtained. The creation and the deletion of holes are studied. The deletion of a hole uses non null-homoto... View full abstract»

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  • Controlled blending in contact situations

    Publication Year: 2002, Page(s):137 - 144
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB) | HTML iconHTML

    Interactive implicit modelling with complex skeletons was improved with the introduction of primitives defined at different LODs. These implicit primitives use a subdivision curve as a skeleton. In this paper an extension to this representation is presented, in order to make it suitable for the interactive modelling and animation of soft objects in contact situations. The first contribution improv... View full abstract»

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  • Shape matching of 3D contours using normalized Fourier descriptors

    Publication Year: 2002, Page(s):261 - 268
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (438 KB) | HTML iconHTML

    In this paper, we develop a simple, eigenspace matching algorithm for closed 3D contours. Our algorithm relies on a novel method which normalizes the Fourier descriptors (FDs) of a 3D contour with respect to two of its FD coefficients corresponding to the lowest non-zero frequencies. The remaining matching task only involves vertex shift and rotation about the z-axis. Our approach is inspired by t... View full abstract»

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