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Computer Graphics, Spring Conference on, 2001.

Date 25-28 April 2001

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Displaying Results 1 - 25 of 30
  • Proceedings Spring Conference on Computer Graphics

    Publication Year: 2001
    Save to Project icon | Request Permissions | PDF file iconPDF (164 KB)  
    Freely Available from IEEE
  • Table of contents

    Publication Year: 2001 , Page(s): 249
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    Freely Available from IEEE
  • An octree isosurface codification based on discrete planes

    Publication Year: 2001 , Page(s): 130 - 137
    Cited by:  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (624 KB) |  | HTML iconHTML  

    Describes a method to code a decimated model of an isosurface on an octree representation while maintaining volume data if it is needed. The proposed technique is based on grouping the marching cubes (MC) patterns into five configurations according the topology and the number of planes of the surface that are contained in a cell. Moreover, the discrete number of planes on which the surface lays is... View full abstract»

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  • Taylor models and affine arithmetics-towards a more sophisticated use of reliable methods in computer graphics

    Publication Year: 2001 , Page(s): 40 - 47
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (628 KB) |  | HTML iconHTML  

    A critical discussion of existing applications of reliable methods in computer graphics and the fact that one of the key applications of reliable arithmetics in computer graphics is its use for range analysis provokes a reconsideration of existing ideas of bounding volumes. A novel kind of parametrized bounding volume for parametric surfaces is proposed that informs about the location of each surf... View full abstract»

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  • Smooth high-quality interactive visualization

    Publication Year: 2001 , Page(s): 87 - 94
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (684 KB) |  | HTML iconHTML  

    The paper addresses the problem of interactive visualization in the view-dependent simplification framework. A geomorphing algorithm for interpolation between different levels of detail is given. The interpolation parameter is derived from the screen-space geometric error instead of assigning a fixed transition time to the interpolation process. Furthermore, a hybrid frame rate control system is p... View full abstract»

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  • High precision non-binary voxelization of geometric objects

    Publication Year: 2001 , Page(s): 220 - 229
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1004 KB) |  | HTML iconHTML  

    Volume graphics represents a set of techniques aimed at modeling, manipulation and rendering of objects represented by means of a 3D raster of elementary volume primitives-voxels. It represents a viable alternative for the standard surface graphics, and as such, it provides us with a possibility to overcome some of its bottlenecks and to extend its capabilities even further. Namely, by means of vo... View full abstract»

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  • Perspective projection through parallel projected slabs for virtual endoscopy

    Publication Year: 2001 , Page(s): 241 - 248
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (856 KB) |  | HTML iconHTML  

    Virtual endoscopy is a promising medical application for volume rendering techniques where perspective projection is mandatory. Most of the acceleration techniques for direct volume rendering make use of parallel projection. This is also the case of the current generation of VolumePro systems, which achieve real-time frame rates but unfortunately just provide parallel projection. In this paper, an... View full abstract»

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  • Exploiting temporal and spatial coherence in hierarchical visibility algorithms

    Publication Year: 2001 , Page(s): 156 - 163
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (704 KB) |  | HTML iconHTML  

    Presents a series of simple improvements that make use of temporal and spatial coherence in the scope of hierarchical visibility algorithms. The hierarchy updating avoids visibility tests of certain interior nodes of the hierarchy. The visibility propagation algorithm reuses information about visibility of neighbouring spatial regions. Finally, the conservative hierarchy updating avoids visibility... View full abstract»

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  • Multiresolution texture for photorealistic rendering

    Publication Year: 2001 , Page(s): 109 - 116
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (908 KB) |  | HTML iconHTML  

    This paper presents a method to automatically calculate texture maps for a given 3D object from a sequence of images. It is used in our image-based modeling approach after the registration of the images and the geometric modeling has been done. We show that the presented method uses the information from all images by implicitly applying a weighting function. Using this approach, the consideration ... View full abstract»

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  • Post-optimization of Delaunay tetrahedrization

    Publication Year: 2001 , Page(s): 31 - 38
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (584 KB) |  | HTML iconHTML  

    The paper brings results of post-optimization of Delaunay tetrahedrization. Delaunay triangulation is a very popular method to create 2D meshes, but in 3D its properties are not as good as in 2D and can be improved. For this improvement an already existing method was used: local transformations, so called flips, performed in order to improve different geometrical properties of tetrahedra and appli... View full abstract»

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  • An efficient technique for ray tracing of a D0L-system

    Publication Year: 2001 , Page(s): 165 - 172
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (624 KB) |  | HTML iconHTML  

    Presents an algorithm which aims at reducing the execution time and memory requirements of the synthesis of plants which are generated by a D0L system (deterministic context-free Lindenmayer system) and rendered by ray tracing. We propose a new method that carries out an intersection test directly with the production obtained by a D0L system, and thus attain considerable size reduction in the data... View full abstract»

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  • Layered data representation for visual simulation of terrain erosion

    Publication Year: 2001 , Page(s): 80 - 86
    Cited by:  Papers (5)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (820 KB) |  | HTML iconHTML  

    New data structure for visual simulation of 3D terrains is introduced. The representation is inspired by real geological measurements and presents good trade-off between commonly used inexpensive, but inaccurate, height fields and memory demanding voxel representation. The representation is based on horizontal stratified layers consisting of one material. The layers are captured in certain positio... View full abstract»

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  • View-dependent information theory quality measures for pixel sampling and scene discretization in flatland

    Publication Year: 2001 , Page(s): 173 - 180
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (500 KB) |  | HTML iconHTML  

    In this paper, we present view-dependent information theory quality measures for pixel sampling and scene discretization in flatland. The measures are based on a definition for the mutual information of a line, and have a purely geometrical basis. Several algorithms exploiting them are presented and compare well with an existing one based on depth differences View full abstract»

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  • Growth simulation of human embryo brain

    Publication Year: 2001 , Page(s): 139 - 145
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (672 KB) |  | HTML iconHTML  

    The growth of the brain of a human embryo changes over a long period of time in the body of the mother. So it is very difficult to observe and to understand that process. Therefore, embryologists have found realistic human organ models and animations to be necessary for their studies, but to create realistic human embryo brain models and to perform the animations requires an appropriate methodolog... View full abstract»

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  • Mixture of random walk solution and quasi-random walk solution to global illumination

    Publication Year: 2001 , Page(s): 211 - 217
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (700 KB) |  | HTML iconHTML  

    Conventional Monte Carlo methods are often used to solve some hard second kind Fredholm integral equations such as the difficult global illumination problems due to its dimensional independence. However, the convergence rate of the quasi-Monte Carlo methods for numerical integration is superior to that of the Monte Carlo methods. We present two mixed strategies that make use of both the statistica... View full abstract»

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  • Topological graphics

    Publication Year: 2001 , Page(s): 2 - 9
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (736 KB) |  | HTML iconHTML  

    Topological graphics opens up completely new worlds in computer graphics applications. It is supported by advances in modern algebraic topology homotopy theory and cellular spatial structures in particular. Topological graphics lays out the framework to interactively construct cyberworlds emerging on the World Wide Web. It guides graphics software design to make it minimal and reusable. This progr... View full abstract»

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  • Virtual Shikki and Sazaedo: shape modeling in digital preservation of Japanese lacquer ware and temples

    Publication Year: 2001 , Page(s): 147 - 154
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (708 KB) |  | HTML iconHTML  

    Issues concerning the digital preservation of the shapes and internal structures of culturally valuable objects are discussed. An overview of existing approaches to digital shape preservation and corresponding problems is given. Our approach is based on using constructive modeling, which reflects the logical structure of the shapes. We examine and select those mathematical representations of shape... View full abstract»

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  • A colour reindexing algorithm for lossless compression of digital images

    Publication Year: 2001 , Page(s): 104 - 108
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (376 KB) |  | HTML iconHTML  

    The efficiency of lossless compression algorithms for fixed palette images (also called indexed images) changes if a different indexing scheme is adopted. Indeed, these algorithms adopt a differential-predictive approach of some sort: if the spatial distribution of the indexes over the image is smooth, greater compression ratios may be obtained. It hence becomes relevant to find an indexing scheme... View full abstract»

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  • Interactive display of surfaces using subdivision surfaces and wavelets

    Publication Year: 2001 , Page(s): 118 - 127
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (908 KB) |  | HTML iconHTML  

    Complex surfaces and solids are produced by large-scale modeling and simulation activities in a variety of disciplines. Productive interaction with these simulations requires that these surfaces or solids should be viewable at interactive rates - yet many of these surfaces/solids can contain hundreds of millions of polygons/polyhedra. Interactive display of these objects requires compression techn... View full abstract»

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  • Bivariate simplex B-splines: a new paradigm

    Publication Year: 2001 , Page(s): 71 - 78
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1028 KB) |  | HTML iconHTML  

    A construction of bivariate splines is described, based on a new concept of higher degree Delaunay configurations. The crux of this construction is that knot-sets for simplex B-splines are selected by considering groups of "nearby" knots. The new approach gives rise to a natural generalization of univariate splines in that the linear span of this collection of B-splines forms a space which is anal... View full abstract»

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  • Some new challenging research topics in human animation

    Publication Year: 2001 , Page(s): 12 - 20
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (892 KB) |  | HTML iconHTML  

    The paper aims at defining new challenging research topics related to human simulation and animation. Although virtual human modelling, animation and simulation aspects have now been widely studied, there remain many topics and applications that are still open for research. Among them, we propose a survey of the current status and the future directions of research topics and applications such as v... View full abstract»

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  • A distributed visualization environment for scientific visualization based on Jini technology

    Publication Year: 2001 , Page(s): 95 - 101
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (552 KB) |  | HTML iconHTML  

    In computational fluid dynamics (CFD), visualization is a powerful instrument for research, training and development. It has been used for data evaluation and for qualitative comparison to flow visualization originating from experiments. The design and implementation of distributed visualization systems involve a set of issues mainly concerning performance, reliability and ease of developing and u... View full abstract»

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  • On the domain of constructive geometric constraint solving techniques

    Publication Year: 2001 , Page(s): 49 - 54
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (336 KB) |  | HTML iconHTML  

    We study the domain of two constructive geometric constraint solving techniques. Both deal with constraints represented by a geometric constraint graph. The first technique analyses the graph bottom-up, from the edges to the whole graph. The second technique analyses the graph top-down, from the whole graph to the individual edges. We describe these techniques using abstract reduction systems whic... View full abstract»

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  • Vessel tracking in peripheral CTA datasets-an overview

    Publication Year: 2001 , Page(s): 232 - 239
    Cited by:  Papers (4)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (812 KB) |  | HTML iconHTML  

    We describe the results of the literature review focused on the peripheral vessel segmentation in 3D medical datasets, acquired by computer tomography angiography (CTA) of the human leg. The fundamental aim of such a segmentation task is a robust method for the detection of main vessels in the leg that simultaneously preserves the vessel calcification (the sediment is called plaque) and allows loc... View full abstract»

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  • Texturing through constructive modeling

    Publication Year: 2001 , Page(s): 190 - 200
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1132 KB) |  | HTML iconHTML  

    The concept of solid texturing is extended in two directions: constructive modeling of space partitions for texturing and modeling of multi-dimensional textured objects called hypervolumes. A hypervolume is considered as a point set with attributes of both physical (density, temperature, etc.) and photometric (color, transparency, diffuse and specular reflections, etc.) nature. The point-set geome... View full abstract»

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