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Theory and Practice of Computer Graphics, 2003. Proceedings

Date 5-5 June 2003

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Displaying Results 1 - 25 of 29
  • Proceedings Theory and Practice of Computer Graphics

    Publication Year: 2003
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (240 KB)  

    The following topics are discussed: images and display; information visualization; natural environments and facial animation; rendering and modeling; virtual worlds; and volumes. View full abstract»

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  • Author index

    Publication Year: 2003 , Page(s): 215
    Save to Project icon | Request Permissions | PDF file iconPDF (152 KB)  
    Freely Available from IEEE
  • A unifying model for the composition and simulation of behaviors in distributed virtual environments

    Publication Year: 2003 , Page(s): 201 - 208
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (337 KB) |  | HTML iconHTML  

    A growing range of applications can benefit from distributed virtual environments (DVEs), from CAD (computer-aided design) to e-learning (electronic learning), and in a variety of sectors from entertainment to scientific simulations. Developing such projects is challenging because writing real-time software in computer graphics, distributed applications and behavioral simulations is technically di... View full abstract»

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  • Real-time path planning for navigation in unknown environment

    Publication Year: 2003 , Page(s): 138 - 145
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (380 KB) |  | HTML iconHTML  

    Real-time path planning is a challenging task that has many applications in the fields of AI, moving robots, virtual reality, agent behavior simulation, and action games. The various approaches for path planning have different criteria that have to be met, resulting in a number of algorithms for solutions to specific problems. In this paper, we introduce our approach and recent development regardi... View full abstract»

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  • Formulated silhouettes for sketching terrain

    Publication Year: 2003 , Page(s): 90 - 96
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1191 KB) |  | HTML iconHTML  

    The mathematical definition of silhouettes within NPAR is based on the assumption that they are the eye-centered projections of occluding contours on an imaging plane. However, occluding contours are insufficient for sketching the silhouettes of hills as drawn by cartographers. The research reported in this paper is based on the proposition that silhouettes are mental visualizations of the outline... View full abstract»

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  • 3D sound feedback act as task aid in a virtual assembly environment

    Publication Year: 2003 , Page(s): 209 - 213
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (327 KB) |  | HTML iconHTML  

    The multi-modal information presentation integrated into the virtual environments can stimulate different senses, increase the user's sense of immersion, and the amount of information accepted and processed by the user. The increase of information may reduce the error and time taken to complete a task. This paper presents our approach for integrating 3D sound into virtual assembly environment for ... View full abstract»

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  • Generalizing video textures

    Publication Year: 2003 , Page(s): 8 - 15
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (380 KB) |  | HTML iconHTML  

    This paper presents the results of a project generalizing the 'video textures' technique as described in (Schodl et al., 2000). The algorithms used were generalized such that either video or audio input clips could be used to create novel and infinitely varying video or audio 'textures'. The algorithms were tested and refined to produce acceptable results for both forms of media, and a simple inte... View full abstract»

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  • Shape-similarity search of 3D models by using enhanced shape functions

    Publication Year: 2003 , Page(s): 97 - 104
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (793 KB) |  | HTML iconHTML  

    We propose a pair of shape features for shape-similarity search of 3D (three-dimensional) polygonal-mesh models. The shape features are an extension of the D2 shape functions proposed by Osada et al. (2001). Our proposed shape features are tolerant of topological variations and geometrical degeneracies. Our shape feature is also invariant to similarity transformation. Experiments showed that, with... View full abstract»

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  • Shell representation and compression conscious manipulation for three-dimensional graphical datasets

    Publication Year: 2003 , Page(s): 162 - 169
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (366 KB) |  | HTML iconHTML  

    Although there have been a large number of standards for two-dimensional images, there has not been as extensive a study into representing three-dimensional datasets. Presented here is a test from an extended system to cater for initially autostereo sequence datasets, although still suitable for all types of three-dimensional datasets. Extensions to do three-dimensional manipulation operations are... View full abstract»

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  • Simulation of unmanned air vehicle flocking

    Publication Year: 2003 , Page(s): 130 - 137
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (401 KB) |  | HTML iconHTML  

    Flocking style behavior is commonplace in nature. It provides a number of benefits for groups of creatures on the move at little cost. Unmanned air vehicles are becoming increasingly popular for a variety of applications and are often used in groups. Manually controlling many UAVs at high densities can be difficult. The simple, efficient and safe nature of flocking as an automated flight control m... View full abstract»

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  • Visualizing diffusion-weighted MRI data using collaborative virtual environment and grid technologies

    Publication Year: 2003 , Page(s): 156 - 161
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (495 KB) |  | HTML iconHTML  

    We describe a collaborative virtual environment system for visualization of diffusion magnetic resonance imaging scans. The system represents the 3D (three-dimensional) data by arrays of polyhedra, colored by the degree of anisotropy and directed by the principal component of the diffusion tensor. Users can then collaboratively explore the data and interactively spawn tractography processes that c... View full abstract»

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  • Modeling virtual gardens by autonomous procedural agents

    Publication Year: 2003 , Page(s): 58 - 65
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (935 KB) |  | HTML iconHTML  

    A cultivated virtual plant ecosystems modeling by means of simple memoryless procedural agents is presented. The ecosystem growth is a dynamic process with a tendency to chaos. An agent can move in the ecosystem and perform certain actions defined by users in the agent description file. Agents can seed new plants, pull out weeds, water plants, and communicate by message passing to distribute their... View full abstract»

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  • Point inversion and projection for NURBS curve: control polygon approach

    Publication Year: 2003 , Page(s): 113 - 120
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (373 KB) |  | HTML iconHTML  

    Projecting a test point to a NURBS curve finds the closest point on the curve and point inversion finds the corresponding parameter for this test point. This paper presents an accurate and efficient method to solve both of these problems. We first subdivide the NURBS curves into a set of Bezier curves using knot insertion. For point projection, we extract candidate Bezier subcurves based on the re... View full abstract»

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  • Generic graphics architecture

    Publication Year: 2003 , Page(s): 105 - 112
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (590 KB) |  | HTML iconHTML  

    We introduce a generic architecture that is sufficiently general to treat a wide variety of rendering strategies. The architecture is particularized according to common features of energy distribution techniques. The survey of energy distribution techniques and the principles used by various illumination algorithms are discussed in the context of possible solutions in an object-oriented generic re... View full abstract»

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  • Guided navigation in task-oriented 3D graph visualizations

    Publication Year: 2003 , Page(s): 26 - 33
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (672 KB) |  | HTML iconHTML  

    In many application areas an optimal visualization of a complex graph depends on the specific task to be accomplished by the user. Therefore a means of locally customizable layouts is required to focus on different problem aspects. We propose a concept of user-driven hierarchy formation and layout optimization in the context of IBM zSeries I/O configurations. We combine the concepts of glyphs, loc... View full abstract»

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  • An SVG browser for XML languages

    Publication Year: 2003 , Page(s): 42 - 48
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (494 KB) |  | HTML iconHTML  

    In this paper, we show how XML-based languages such as XHTML, MathML and SVG can be rendered into SVG. The SVG generated can then be displayed on a screen or printer. A variety of architectural approaches are explored and we present both server-side and client-side solutions using engines written in Java and JavaScript. Our approach enables a document containing a mixture of XHTML, MathML and SVG ... View full abstract»

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  • Examination of the color selection process within digital design for the built environment

    Publication Year: 2003 , Page(s): 193 - 200
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (338 KB) |  | HTML iconHTML  

    Color selection within built environment visualization involves the decisive arrangement and application of color for the principle interpretation and organization of structural and spatial information. Therefore, appropriate and accurate forms for selecting colors are necessary to ensure that a full communicative visualization can be generated for information processing. However, it appears that ... View full abstract»

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  • Planar Bones for MPEG-4 facial animation

    Publication Year: 2003 , Page(s): 81 - 88
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1912 KB) |  | HTML iconHTML  

    This paper proposes a deformation technique called Planar Bones, derived from surface-oriented free form deformations, and explores its application to the context of facial animation. The warping method proposed uses as the control input a polygonal mesh, which is built as a triangulation of the feature points defined by MPEG-4 (Motion Picture Experts Group). A strong correspondence between the fa... View full abstract»

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  • Designing projective environments

    Publication Year: 2003 , Page(s): 2 - 7
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (353 KB) |  | HTML iconHTML  

    A number of projection systems have been constructed that create an immersive experience for the viewer. However, little consideration has been given to the development of projection systems that can use the surfaces in our everyday environment as their target. The paper discusses the progress that has been achieved in the area of projection systems and the technologies involved. A system is prese... View full abstract»

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  • Intuitive crowd behavior in dense urban environments using local laws

    Publication Year: 2003 , Page(s): 122 - 129
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (518 KB) |  | HTML iconHTML  

    In games, entertainment, medical and architectural applications, the creation of populated virtual city environments has recently become widespread. In this paper we want to provide a technique that allows the simulation of up to 10,000 pedestrians walking in real-time. Simulation for such environments is difficult as a trade off needs to be found between realism and real-time simulation. This pap... View full abstract»

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  • Demosaicing of color images using pixel level data-dependent triangulation

    Publication Year: 2003 , Page(s): 16 - 23
    Cited by:  Papers (1)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (551 KB) |  | HTML iconHTML  

    Single-chip digital cameras use an array of broad-spectrum charge-coupled devices (CCD) overlayed with a color filter array. The filter layer consists of transparent patches of red, green and blue, such that each CCD pixel captures one of these primary colors. To reconstruct a color image at the full CCD resolution, the 'missing' primary values have to be interpolated from nearby samples. We prese... View full abstract»

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  • The 3D Wunderkammer: an indexing by placing approach to the image storage and retrieval

    Publication Year: 2003 , Page(s): 34 - 41
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1173 KB) |  | HTML iconHTML  

    The explosion of storage media size and spread of the Internet have resulted in a huge amount of images and multimedia material that an average user has to deal with. The traditional use of filenames and directories is no longer sufficient. In contrast to keywording and a kind of content-based image retrieval, we introduce a novel approach to storing and retrieving images, and other multimedia mat... View full abstract»

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  • High performance visualization in a hospital operating theatre

    Publication Year: 2003 , Page(s): 170 - 175
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (513 KB) |  | HTML iconHTML  

    This paper describes an innovative system called Op3D that delivers high performance visualization to a hospital operating theatre. This is the first time that a hepato-pancreatic surgeon has been able to benefit from 3D (three-dimensional) visualization tools at the sharp end of his clinical practice. Early results are supporting our hypothesis that interactive access to 3D visualization and reco... View full abstract»

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  • Exploiting partial visibility in the real-time display of virtual natural environments

    Publication Year: 2003 , Page(s): 66 - 73
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (305 KB) |  | HTML iconHTML  

    With the increasing popularity of virtual environment applications there has been much research into algorithms to efficiently display polygonal databases. Most research has been devoted to developing rendering algorithms for the efficient display of databases containing many large geometric structures, such as those describing indoor and urban environments. However, relatively little work has bee... View full abstract»

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  • Real-time crowd movement on large scale terrains

    Publication Year: 2003 , Page(s): 146 - 153
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (582 KB) |  | HTML iconHTML  

    Crowds are described as complex adaptive systems in artificial intelligence. The generation of crowd in real-time simulations is beyond the manual design capability. In this paper, we present an integrated animation framework for simulating the adaptive movement behaviors of crowds on large terrains. A simulation system that is developed based on the framework can be used as a powerful animation a... View full abstract»

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