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Proceedings SMI. Shape Modeling International 2002

17-22 May 2002

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  • Proceedings SMI. Shape Modeling International 2002

    Publication Year: 2002
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    Freely Available from IEEE
  • Geometric modeling without coordinates and indices (extended abstract)

    Publication Year: 2002, Page(s):3 - 4
    Cited by:  Papers (1)
    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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  • Morphological modeling and deformation of 3D objects

    Publication Year: 2002
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB) | HTML iconHTML

    Summary form only given. I first introduce a new modeling technique which allows a total control of the volume (or mass) of objects. I also present former work in the domain. The technique is aimed at producing algebraic operators on objects in a similar way to CGS composition. In our case, I add volume control. I first study the "sum" of two objects which is such that the volume of the sum is equ... View full abstract»

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  • Author index

    Publication Year: 2002, Page(s): 279
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    Freely Available from IEEE
  • 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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  • 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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  • 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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  • Wiener filtering of meshes

    Publication Year: 2002, Page(s):51 - 57
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (595 KB) | HTML iconHTML

    This work investigates smoothing, fairing, or, more generally, filtering of mesh geometry. The approach transfers the ideas of optimal (Wiener) filtering to the setting of meshes. It extends fairing approaches that use only first order neighborhoods and allows to assume arbitrary local spectral properties of the mesh geometry. The definition of the local autocorrelation allows the design of filter... View full abstract»

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  • A prototype system for robust, interactive and user-friendly modeling of orientable 2-manifold meshes

    Publication Year: 2002, Page(s):43 - 50
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB) | HTML iconHTML

    We present a prototype system for robust, interactive and user friendly modeling of orientable 2-manifold meshes. To develop the system we introduce new topological entities for effectively manipulating 2-manifold mesh structures. We identify a minimal set of fundamental operators, which is necessary and sufficient for performing all homeomorphic and topological operations on 2-manifold mesh struc... 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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  • Recursive subdivision and hypergeometric functions

    Publication Year: 2002, Page(s):29 - 34
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB) | HTML iconHTML

    We describe a method for efficient calculation of coefficients for subdivision schemes. We work on the unit sphere and we express the z-coordinate of all the existing points as power series in the variable cos θ. Any linear combination of them is also a power series in cos θ and, by solving a linear system, we determine the linear combination that will give the smoothest interpolation ... 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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  • Normal control using N-adic subdivision schemes

    Publication Year: 2002, Page(s):21 - 28
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1217 KB) | HTML iconHTML

    This paper presents simple and efficient deformation methods based on a new class of interpolating N-adic subdivision algorithms. Our N-adic scheme is a natural extension of a standard dyadic scheme-each face of the mesh is more generally divided into N2 sub-faces-and geometric properties are similar. This framework enables us to locally deform the surface using different tools by eithe... View full abstract»

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  • Affine-invariant skeleton of 3D shapes

    Publication Year: 2002, Page(s):245 - 252
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB) | HTML iconHTML

    Different application fields have shown increasing interest in shape description oriented to recognition and similarity issues. Beyond the application aims, the capability of handling details separating them from building elements, the invariance to a set of geometric transformations, the uniqueness and stability to noise represent fundamental properties of each proposed model. This paper defines ... 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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  • Using particles to sample and control more complex implicit surfaces

    Publication Year: 2002, Page(s):129 - 136
    Cited by:  Papers (11)
    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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  • Simple manifolds for surface modeling and parameterization

    Publication Year: 2002, Page(s):237 - 244
    Cited by:  Papers (2)
    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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Shape matching of 3D contours using normalized Fourier descriptors

    Publication Year: 2002, Page(s):261 - 268
    Cited by:  Papers (7)
    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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  • 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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  • 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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