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Date Oct. 27 1996-Nov. 1 1996

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Displaying Results 1 - 25 of 62
  • Proceedings of Seventh Annual IEEE Visualization '96

    Publication Year: 1996
    Request permission for commercial reuse | PDF file iconPDF (347 KB)
    Freely Available from IEEE
  • Anatomy-based facial tissue modeling using the finite element method

    Publication Year: 1996, Page(s):21 - 28
    Cited by:  Papers (15)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3076 KB)

    Anatomy-based facial tissue modeling for surgical simulation is a field whose time has come. Real-time facial animation has been created in the last few years using models based on the anatomical structure of the human skin. Anatomy-based models are also under development in the field of medical visualization, with which facial surgery can be realistically simulated. In this article, we present an... View full abstract»

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  • A fast Gibbs sampler for synthesizing constrained fractals

    Publication Year: 1996, Page(s):29 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8449 KB)

    It is well known that the spatial frequency spectra of membrane and thin-plate splines exhibit self-affine characteristics and hence behave as fractals. This behavior was exploited in generating the constrained fractal surfaces in the work of Szeliski and Terzopoulos (1989), which were generated by using a Gibbs sampler algorithm. The algorithm involves locally perturbing a constrained spline surf... View full abstract»

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  • Temporal continuity of levels of detail in Delaunay triangulated terrain

    Publication Year: 1996, Page(s):37 - 42
    Cited by:  Papers (19)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (649 KB)

    The representation of a scene at different levels of detail is necessary to achieve real-time rendering. In aerial views, only the part of the scene that is close to the viewing point needs to be displayed with a high level of detail, while more distant parts can be displayed with a low level of detail. However, when a sequence of images is generated and displayed in real-time, the transition betw... View full abstract»

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  • BLaC-wavelets: a multiresolution analysis with non-nested spaces

    Publication Year: 1996, Page(s):43 - 48
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (223 KB)

    In the last five years, there has been numerous applications of wavelets and multiresolution analysis in many fields of computer graphics as different as geometric modelling, volume visualization or illumination modelling. Classical multiresolution analysis is based on the knowledge of a nested set of functional spaces in which the successive approximations of a given function converge to that fun... View full abstract»

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  • Fast stereo volume rendering

    Publication Year: 1996, Page(s):49 - 56
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (225 KB)

    We present new volume rendering techniques for efficiently generating high-quality stereoscopic images and propose criteria to evaluate stereo volume rendering algorithms. Specifically, we present fast stereo volume ray casting algorithms using segment composition and linearly-interpolated re-projection. A fast stereo shear-warp volume rendering algorithm is also presented and discussed. View full abstract»

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  • Hierarchical and parallelizable direct volume rendering for irregular and multiple grids

    Publication Year: 1996, Page(s):57 - 63
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (279 KB)

    A general volume rendering technique is described that efficiently produces images of excellent quality from data defined over irregular grids having a wide variety of formats. Rendering is done in software, eliminating the need for special graphics hardware, as well as any artifacts associated with graphics hardware. Images of volumes with about 1,000,000 cells can be produced in one to several m... View full abstract»

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  • Deformable volume rendering by 3D texture mapping and octree encoding

    Publication Year: 1996, Page(s):73 - 80
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (185 KB)

    Rendering deformable volume data currently needs separate processes for deformation and rendering, and is expensive in terms of both computational and memory costs. Recognizing the importance of unifying these processes, we present a new approach to the direct rendering of deformable volumes without explicitly constructing the intermediate deformed volumes. The volume deformation is done by a radi... View full abstract»

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  • Visualization over the World Wide Web and its application to environmental data

    Publication Year: 1996, Page(s):81 - 86
    Cited by:  Papers (13)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    Explores the way in which data visualization systems, in particular modular visualization environments, can be used over the World Wide Web. The conventional approach is for the publisher of the data also to be responsible for creating the visualization, and posting it as an image on the Web. This leaves the viewer in a passive role, with no opportunity to analyse the data in any way. We look at d... View full abstract»

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  • Cheops: a compact explorer for complex hierarchies

    Publication Year: 1996, Page(s):87 - 92
    Cited by:  Papers (11)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (329 KB)

    As the amount of electronic information explodes, hierarchies to handle this information become huge and complex. Visualizing and interacting with these hierarchies become daunting tasks. The problem is exacerbated if the visualization is to be done on mass-market personal computers, with limited processing power and visual resolution. Many of the current visualization techniques work effectively ... View full abstract»

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  • Interactive visualization of 3D-vector fields using illuminated stream lines

    Publication Year: 1996, Page(s):107 - 113
    Cited by:  Papers (40)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    A new technique for interactive vector field visualization using large numbers of properly illuminated stream lines is presented. Taking into account ambient, diffuse, and specular reflection terms as well as transparency, we employ a realistic shading model which significantly increases quality and realism of the resulting images. While many graphics workstations offer hardware support for illumi... View full abstract»

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  • Raycasting vector fields

    Publication Year: 1996, Page(s):115 - 120
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    Direct Volume Rendering (DVR) allows the holistic visualization of huge volumetric data sets in a single image. Computational fluid dynamics data is in principle well suited for DVR. But efficient mappings of the directional information of vector fields are still to be found. We investigate how the raycasting technique can be used to directly render vector fields. Our approach is based on the perc... View full abstract»

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  • Multi-frequency noise for LIC

    Publication Year: 1996, Page(s):121 - 126
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    We present a way to visualize a flow field using Line Integral Convolution (LIC) with a multi frequency noise texture. A broad range of feature sizes can enhance a user's perception of the magnitudes and direction of the flow. In addition, the multiple scales of feature size help a user clarify the motion of the flow in an animation. View full abstract»

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  • A linear iteration time layout algorithm for visualising high-dimensional data

    Publication Year: 1996, Page(s):127 - 131
    Cited by:  Papers (40)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (223 KB)

    A technique is presented for the layout of high dimensional data in a low dimensional space. This technique builds upon the force based methods that have been used previously to make visualisations of various types of data such as bibliographies and sets of software modules. The canonical force based model, related to solutions of the N body problem, has a computational complexity of O(N... View full abstract»

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  • Flexible information visualization of multivariate data from biological sequence similarity searches

    Publication Year: 1996, Page(s):133 - 140
    Cited by:  Papers (6)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (191 KB)

    Information visualization faces challenges presented by the need to represent abstract data and the relationships within the data. Previously, we presented a system for visualizing similarities between a single DNA sequence and a large database of other DNA sequences (E.H. Chi et al., 1995). Similarity algorithms generate similarity information in textual reports that can be hundreds or thousands ... View full abstract»

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  • Multiresolution multidimensional wavelet brushing

    Publication Year: 1996, Page(s):141 - 148
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1510 KB)

    Brushing is a data visualization technique that identifies and highlights data subsets. We introduce a form of brushing in which the brushed data is usually displayed at a different resolution than the non brushed data. The paper presents the rationale behind the multiresolution support of multivariate data visualization and describes the construction of multiresolution brushing using wavelet appr... View full abstract»

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  • History consideration in reconstructing polyhedral surfaces from parallel slices

    Publication Year: 1996, Page(s):149 - 156
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (290 KB)

    We introduce an algorithm for reconstructing a solid model given a series of planar cross sections. The main contribution of this work is the use of knowledge obtained during the interpolation of neighboring layers while attempting to interpolate a particular layer. This knowledge is used to reconstruct a surface in which consecutive layers are connected smoothly. In most previous work, each layer... View full abstract»

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  • Volume tracking

    Publication Year: 1996, Page(s):157 - 164
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    3D time varying datasets are difficult to visualize and analyze because of the immense amount of data involved. This is especially true when the datasets are turbulent with many evolving amorphous regions, as it is difficult to observe patterns and follow regions of interest. We present our volume based feature tracking algorithm and discuss how it can be used to help visualize and analyze large t... View full abstract»

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  • Contour blending using warp-guided distance field interpolation

    Publication Year: 1996, Page(s):165 - 172
    Cited by:  Papers (11)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (621 KB)

    Given (n-1)-dimensional parallel cross-sections of an n-dimensional body, one would like to reconstruct the n-dimensional body. The method based on Distance Field Interpolation (DFI) gives a robust solution to this problem in its ability to deal with any topology in any dimension. Still this method may give undesired solutions to the problem if the changes from one cross-section to the next are si... View full abstract»

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  • Complex-valued contour meshing

    Publication Year: 1996, Page(s):173 - 180
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1333 KB)

    An isovalue contour of a function of two complex variables defines a surface in four-space. We present a robust technique for creating polygonal contours of complex-valued functions. The technique, contour meshing, generalizes well to larger dimensions. View full abstract»

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  • Perceptualisation using a tactile mouse

    Publication Year: 1996, Page(s):181 - 188
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2284 KB)

    Whilst there has been considerable effort in constructing force feedback devices for use in virtual environments, and in the use of touch as a prosthesis for the blind, there has been little work on the use of touch in the visualisation or more properly, perceptualisation of data. Touch potentially offers an additional dimension of perception where visualisation is limited by screen size, resoluti... View full abstract»

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  • LISTEN: sounding uncertainty visualization

    Publication Year: 1996, Page(s):189 - 195
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    Integrated presentation of data with uncertainty is a worthy goal in scientific visualization. It allows researchers to make informed decisions based on imperfect data. It also allows users to visually compare and contrast different algorithms for performing the same task or different models for representing the same physical phenomenon. We present LISTEN-a data sonification system that has been i... View full abstract»

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  • A haptic interaction method for volume visualization

    Publication Year: 1996, Page(s):197 - 204
    Cited by:  Papers (75)  |  Patents (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    Volume visualization techniques typically provide support for visual exploration of data, however additional information can be conveyed by allowing a user to see as well as feel virtual objects. We present a haptic interaction method that is suitable for both volume visualization and modeling applications. Point contact forces are computed directly from the volume data and are consistent with the... View full abstract»

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  • Two-handed interactive stereoscopic visualization

    Publication Year: 1996, Page(s):205 - 210
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1690 KB)

    This paper describes a minimally immersive interactive system for visualization of multivariate volumetric data. The system, SFA, uses glyph-based volume rendering which does not suffer the initial costs of isosurface rendering or voxel-based volume rendering, while offering the capability of viewing the entire volume. Glyph rendering also allows the simultaneous display of multiple data values pe... View full abstract»

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  • Illustrating transparent surfaces with curvature-directed strokes

    Publication Year: 1996, Page(s):211 - 218
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1413 KB)

    Transparency can be a useful device for simultaneously depicting multiple superimposed layers of information in a single image. However, in computer-generated pictures-as in photographs and in directly viewed actual objects-it can often be difficult to adequately perceive the three-dimensional shape of a layered transparent surface or its relative depth distance from underlying structures. Inspire... View full abstract»

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