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10th Pacific Conference on Computer Graphics and Applications, 2002. Proceedings.

9-11 Oct. 2002

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Displaying Results 1 - 25 of 70
  • Proceedings 10th Pacific Conference on Computer Graphics and Applications

    Publication Year: 2002
    Request permission for commercial reuse | PDF file iconPDF (358 KB)
    Freely Available from IEEE
  • Hierarchical representation of time-varying volume data with /sup 4//spl radic/2 subdivision and quadrilinear B-spline wavelets

    Publication Year: 2002, Page(s):346 - 355
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (603 KB) | HTML iconHTML

    Multiresolution methods for representing data at multiple levels of detail are widely used for large-scale two- and three-dimensional data sets. We present a four-dimensional multiresolution approach for time-varying volume data. This approach supports a hierarchy with spatial and temporal scalability. The hierarchical data organization is based on /sup 4//spl radic/2 subdivision. The /sup n//spl ... View full abstract»

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  • Author index

    Publication Year: 2002, Page(s):491 - 492
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    Freely Available from IEEE
  • Example-based caricature generation with exaggeration

    Publication Year: 2002, Page(s):386 - 393
    Cited by:  Papers (37)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1029 KB) | HTML iconHTML

    In this paper, we present a system that automatically generates caricatures from input face images. From example caricatures drawn by an artist, our caricature system learns how an artist draws caricatures. In our approach, we decouple the process of caricature generation into two parts, i.e., shape exaggeration and texture style transferring. The exaggeration of a caricature is accomplished by a ... View full abstract»

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  • Interval B-spline curve evaluation bounding point cloud

    Publication Year: 2002, Page(s):424 - 425
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (214 KB) | HTML iconHTML

    We present an algorithm for bounding a piece of strip-shaped point cloud without self-intersections with an interval B-spline curve. Firstly we calculate the boundary points of the point cloud, and then bound it with an interval B-spline curve of which two pieces of boundary curves interpolate these boundary points. For the algorithm there are important applications in product shape verification, ... View full abstract»

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  • Adaptive solid texturing for Web3D applications

    Publication Year: 2002, Page(s):433 - 434
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    Solid texturing is a well-known computer graphics technology, which is problematic because it consumes too much time if every pixel is calculated on the fly or has a very high memory requirement if all of the pixels are stored at the beginning. Although some methods have been proposed, almost all of them need the support of specific hardware accelerators. Hence, these methods could not be applied ... View full abstract»

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  • Interactive transfer function modification for volume rendering using pre-shaded sample runs

    Publication Year: 2002, Page(s):489 - 490
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (429 KB) | HTML iconHTML

    This paper describes a software-based method for interactive transfer function modification. Our approach exploits the fact that, in general, a user will rarely want to modify the viewpoint and the transfer functions at the same time. In that spirit, we optimize the latter by first fixing the viewpoint and then storing a list of pre-shaded, but uncolored, samples along each ray. Then, each time th... View full abstract»

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  • Painting folds using expansion textures

    Publication Year: 2002, Page(s):176 - 183
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1174 KB) | HTML iconHTML

    We present a method relying on expansion textures to add details such as folds on a surface. The user paints the expansion attributes on the surface (amount and direction of expansion, wavelength and regularity of folds), using either interactive or procedural tools. The modeling system generates the folds by calculating the new surface equilibrium. Results show that this tool allows computer grap... View full abstract»

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  • Augmenting computer graphics with haptics for the visualization of vessel networks

    Publication Year: 2002, Page(s):375 - 384
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB) | HTML iconHTML

    Current visualization methods of volume angiograms are limited in their ability to display vessel connectivity and depth information readily available in the data set. In this paper, we introduce a hybrid graphic-haptic display technique that allows visualizing vessel connectivity as well as provides user assistance in tracing vessel branches. Most importantly, our display provides three-dimension... View full abstract»

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  • An efficient brush model for physically-based 3D painting

    Publication Year: 2002, Page(s):413 - 421
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2492 KB) | HTML iconHTML

    This paper presents a novel 3D brush model consisting of a skeleton and a surface, which is deformed through constrained energy minimization. The main advantage of our model over existing ones is in its ability to mimic brush flattening and bristle spreading due to brush bending and lateral friction exerted by the paper surface during the painting process. The ability to recreate such deformations... View full abstract»

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  • Interactive simulation of fire

    Publication Year: 2002, Page(s):431 - 432
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB) | HTML iconHTML

    In this paper we describe a fast and interactive model to simulate and control the fire phenomenon. We use a modified interactive fluid dynamics solver to describe the motion of a 3-gas system. We simulate the motion of oxidizing air, fuel gases, and exhaust gases. The burning process is simulated by consuming fuel and air based on the amounts of fuel and air inside each grid cell. By modeling hea... View full abstract»

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  • Lworld: an animation system based on rewriting

    Publication Year: 2002, Page(s):487 - 488
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (451 KB) | HTML iconHTML

    Lworld is a computer graphics animation system based on L-systems, a parallel rewriting technique used primarily in computer graphics for plant modeling. Because rule-based programming is a powerful technique, we use it as a basis for a general-purpose animation system. We describe the architecture, the features, and the programming language of the animation system. It is particularly well suited ... View full abstract»

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  • Combining 2D feature tracking and volume reconstruction for online video-based human motion capture

    Publication Year: 2002, Page(s):96 - 103
    Cited by:  Papers (5)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (557 KB) | HTML iconHTML

    The acquisition of human motion data is of major importance for creating interactive virtual environments, intelligent user interfaces, and realistic computer animations. Today's performance of off-the-shelf computer hardware enables marker-free non-intrusive optical tracking of the human body. In addition, recent research shows that it is possible to efficiently acquire and render volumetric scen... View full abstract»

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  • Real-time consensus-based scene reconstruction using commodity graphics hardware

    Publication Year: 2002, Page(s):225 - 234
    Cited by:  Papers (29)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB) | HTML iconHTML

    We present a novel use of commodity graphics hardware that effectively combines a plane-sweeping algorithm with view synthesis for real-time, on-line 3D scene acquisition and view synthesis. Using real-time imagery from a few calibrated cameras, our method can generate new images from nearby viewpoints, estimate a dense depth map from the current viewpoint, or create a textured triangular mesh. We... View full abstract»

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  • On-line graphics recognition

    Publication Year: 2002, Page(s):256 - 264
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB) | HTML iconHTML

    A novel and fast shape classification and regularization algorithm for on-line sketchy graphics recognition is proposed. We divided the on-line graphics recognition process into four stages: preprocessing, shape classification, shape fitting, and regularization. The attraction force model is proposed to combine progressively the vertices on the input sketchy stroke and reduce the total number of v... View full abstract»

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  • A simple method for modeling wrinkles on human skin

    Publication Year: 2002, Page(s):166 - 175
    Cited by:  Papers (22)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1614 KB) | HTML iconHTML

    Realism of rendered human skin can be strongly enhanced by taking into account skin wrinkles. However, modeling wrinkles is a difficult task, and considerable time and effort are necessary to achieve satisfactory results. This paper presents a simple method to easily model wrinkles on human skin, taking into account the properties of real wrinkles. Wrinkles are specified using intuitive parameters... View full abstract»

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  • ISpace: interactive volume data classification techniques using independent component analysis

    Publication Year: 2002, Page(s):366 - 374
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB) | HTML iconHTML

    This paper introduces an interactive classification technique for volume data, called ISpace, which uses Independent Component Analysis (ICA) and a multidimensional histogram of the volume data in a transformed space. Essentially, classification in the volume domain becomes equivalent to interactive clipping in the ICA space, which as demonstrated using several examples is more intuitive and direc... View full abstract»

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  • Subdivision surface simplification

    Publication Year: 2002, Page(s):477 - 480
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    A modified quadric error metric (QEM) for simplification of Loop subdivision surfaces is presented The suggested error metric not only measures the geometric difference but also controls the smoothness and well-shapedness of the triangles that result from the decimation process. Minimizing the error with respect to the original limit surface, our method allows for drastic simplification of Loop co... View full abstract»

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  • Normal compression based on clustering and relative indexing

    Publication Year: 2002, Page(s):446 - 447
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (219 KB) | HTML iconHTML

    While the compression of topology and geometry has been explored significantly, the same issue for normals has not yet been studied as much as it deserves. Presented in this paper is a better approach than existing ones to compress the normals of a mesh model. The proposed scheme uses relative indexing to refer to the normals from each face definition. Besides, this scheme uses the concept of clus... View full abstract»

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  • Approximation with active B-spline curves and surfaces

    Publication Year: 2002, Page(s):8 - 25
    Cited by:  Papers (17)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (927 KB) | HTML iconHTML

    An active contour model for parametric curve and surface approximation is presented. The active curve or surface adapts to the model shape to be approximated in an optimization algorithm. The quasi-Newton optimization procedure in each iteration step minimizes a quadratic function which is built up with the help of local quadratic approximants of the squared distance function of the model shape an... View full abstract»

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  • Facial expression space learning

    Publication Year: 2002, Page(s):68 - 76
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (435 KB) | HTML iconHTML

    Animation of facial speech and expressions has experienced increased attention recently. Most current research focuses on techniques for capturing, synthesizing, and retargeting facial expressions. Little attention has been paid to the problem of controlling and modifying the expression itself. We present techniques that separate video data into expressive features and underlying content. This all... View full abstract»

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  • Two methods for creating chinese painting

    Publication Year: 2002, Page(s):403 - 412
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (726 KB) | HTML iconHTML

    We present two methods to create realistic Chinese painting. The first method is to create 3D Chinese painting animation using existing software packages. The second method is an expressive paint tool which allows an artist to interactively create 2D Chinese painting. View full abstract»

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  • Interactive construction of multi-segment curved handles

    Publication Year: 2002, Page(s):429 - 430
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB) | HTML iconHTML

    In this work, we present a method to interactively create multi-segment, curved handles between two star-shaped faces of an orientable 2-manifold mesh or to connect two 2-manifold meshes along such faces. The presented algorithm combines a very simple 2D morphing algorithm with Hermite interpolation to construct the handle. Based on the method, we have developed a user interface tool that allows u... View full abstract»

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  • The light field oracle

    Publication Year: 2002, Page(s):116 - 126
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1713 KB) | HTML iconHTML

    We present the light field oracle, a novel mathematical concept for the acquisition, processing and representation of light fields. We first compute a hierarchical representation from a set of sparse image samples using a combination of wavelet transform and scattered data interpolation. The light field oracle then progressively acquires image data and selectively refines this initial representati... View full abstract»

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  • Single-image reflectance estimation for relighting by iterative soft grouping

    Publication Year: 2002, Page(s):483 - 486
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (319 KB) | HTML iconHTML

    Reflectance values for image-based relighting are often estimated from grouped pixels with similar reflectance, but such groupings are difficult to compute with certainty for sparse image data. To address this problem, we propose an iterative method that aggregates BRDF data in a single image with known geometry and lighting by soft grouping, where pixels contribute to one another's estimate accor... View full abstract»

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