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Fourth International Workshop on Volume Graphics, 2005.

Date 20-21 June 2005

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Displaying Results 1 - 25 of 41
  • A multiresolution volume rendering framework for large-scale time-varying data visualization

    Publication Year: 2005, Page(s):11 - 223
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (561 KB) | HTML iconHTML

    We present a new parallel multiresolution volume rendering framework for large-scale time-varying data visualization using the wavelet-based time-space partitioning (WTSP) tree. Utilizing the wavelet transform, a large-scale time-varying data set is converted into a space-time multiresolution data hierarchy, and is stored in a time-space partitioning (TSP) tree. To eliminate the parent-child data ... View full abstract»

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  • Modeling Volume Textures - Keynote

    Publication Year: 2005, Page(s):0_3 - 0_4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (102 KB)

    First Page of the Article
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  • A VR toolkit for the diagnosis and monitoring of myocardial infarctions

    Publication Year: 2005, Page(s):55 - 227
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (559 KB) | HTML iconHTML

    We have developed a software system that takes standard electrocardiogram (ECG) input and interprets this input along with user-defined and automatically defined markers to diagnose myocardial infarctions (MI). These pathologies are then automatically represented within a volumetric model of the heart. Over a period of six months 30 patients were monitored using a digital ECG system and this infor... View full abstract»

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  • Texturing and hypertexturing of volumetric objects

    Publication Year: 2005, Page(s):117 - 234
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (571 KB) | HTML iconHTML

    Texture mapping is an extremely powerful and flexible tool for adding complex surface detail to an object. This paper introduces a method of surface texturing and hypertexturing complex volumetric objects in real-time. We employ distance field volume representations, texture based volume rendering and procedural texturing techniques with Shader Model 2.0 flexible programmable graphics hardware. We... View full abstract»

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  • An integrated processing pipeline for irregular volume data

    Publication Year: 2005, Page(s):147 - 237
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (520 KB) | HTML iconHTML

    Very large irregular-grid volume data sets are typically represented as tetrahedral mesh and require substantial disk I/O and rendering computation. One effective way to reduce this demanding resource requirement is compression. Previous research showed how rendering and decompression of a losslessly compressed irregular-grid data set can be integrated into a one-pass computation. This work, advan... View full abstract»

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  • iSBVR: isosurface-AIDED hardware acceleration techniques for slice-based volume rendering

    Publication Year: 2005, Page(s):207 - 243
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (555 KB) | HTML iconHTML

    In this paper, we examine the performance of the early z-culling feature on current high-end commodity graphics cards and present an isosurface-aided hardware acceleration algorithm for slice-based volume rendering (iSBVR) to maximize its utilization. We analyze the computational models for early z-culling of the texture based volume rendering. We demonstrate that the performance improves with two... View full abstract»

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  • GPU-based object-order ray-casting for large datasets

    Publication Year: 2005, Page(s):177 - 240
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (528 KB) | HTML iconHTML

    We propose a GPU-based object-order ray-casting algorithm for the rendering of large volumetric datasets, such as the Visible Human CT datasets. A volumetric dataset is decomposed into small sub-volumes, which are then organized using a min-max octree structure. The small sub-volumes are stored in the leaf nodes of the min-max octree, which are also called cells. The cells are classified using a t... View full abstract»

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  • Scaffolding-based segmentation of coronary vascular structures

    Publication Year: 2005, Page(s):47 - 226
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (621 KB) | HTML iconHTML

    The coronary arteries are essential for the proper function of the human heart. However, they are generally difficult to segment in volume datasets separately from the other blood-filled cavities of the heart. The major reason for these difficulties is the lack of sufficient spatial resolution and partial volume effects. In this paper, we present a method to mark the coronary arteries by a virtual... View full abstract»

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  • Representation of objects with sharp details in truncated distance fields

    Publication Year: 2005, Page(s):109 - 233
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (433 KB) | HTML iconHTML

    We present a new approach for voxelization of implicit solids which contain sharp details. If such objects are processed by common techniques, voxelization artifacts may appear, resulting, among others, in jaggy edges in rendered images. To cope with this problem we proposed a technique called sharp details correction. The main idea is to modify objects during the process of voxelization according... View full abstract»

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  • Introducing topological attributes for objective-based visualization of simulated datasets

    Publication Year: 2005, Page(s):137 - 236
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (519 KB) | HTML iconHTML

    Recent development in the design of multi-dimensional transfer functions allows us to automatically generate comprehensible visualization images of given volumes by taking into account local features such as differentials and curvatures. However, especially when visualizing volumes obtained by scientific simulations, observers usually exploit their knowledge about the simulation settings as the cl... View full abstract»

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  • GPU accelerated image aligned splatting

    Publication Year: 2005, Page(s):197 - 242
    Cited by:  Papers (3)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (584 KB) | HTML iconHTML

    Splatting is a popular technique for volume rendering, where voxels are represented by Gaussian kernels, whose pre-integrated footprints are accumulated to form the image. Splatting has been mainly used to render pre-shaded volumes, which can result in significant blurring in zoomed views. This can be avoided in the image-aligned splatting scheme, where one accumulates kernel slices into equi-dist... View full abstract»

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  • Robust generation of signed distance fields from triangle meshes

    Publication Year: 2005, Page(s):167 - 239
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (489 KB) | HTML iconHTML

    A new method for robust generation of distance fields from triangle meshes is presented. Graphics hardware is used to accelerate a technique for generating layered depth images. From multiple layered depth images, a binary volume and a point representation are extracted. The point information is then used to convert the binary volume into a distance field. The method is robust and handles holes, s... View full abstract»

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  • An evaluation of using real-time volumetric display of 3D ultrasound data for intracardiac catheter manipulation tasks

    Publication Year: 2005, Page(s):41 - 45
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (301 KB) | HTML iconHTML

    The enthusiasm for novel, minimally invasive, catheter based intracardiac procedures has highlighted the need to provide accurate, realtime, anatomically based image guidance to decrease complications, improve precision, and decrease fluoroscopy time. The recent development of realtime 3D echocardiography creates the opportunity to greatly improve our ability to guide minimally invasive procedures... View full abstract»

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  • Accelerated, high-quality refraction computations for volume graphics

    Publication Year: 2005, Page(s):73 - 229
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (546 KB) | HTML iconHTML

    We present an efficient framework for the high-quality rendering of discretely sampled surface-based objects with refractive effects. This requires an accurate estimation of the refraction coefficients, paired with efficient and accurate surface detection, space traversal, and backdrop image sampling. Our framework achieves these goals, by employing a high-quality spline-based filter in conjunctio... View full abstract»

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  • Time-varying interval volumes

    Publication Year: 2005, Page(s):99 - 232
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (542 KB) | HTML iconHTML

    In this paper, we study the interval segmentation and direct rendering of time-varying volumetric data to provide a more effective and interactive volume rendering of time-varying structured and unstructured grids. Our segmentation is based upon intervals within the scalar field between time steps, producing a set of geometrically defined time-varying interval volumes. To construct the time-varyin... View full abstract»

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  • Visualization of time-varying volumetric data using differential time-histogram table

    Publication Year: 2005, Page(s):21 - 224
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (522 KB) | HTML iconHTML

    We introduce a novel data structure called differential time-histogram table (DTHT) for visualization of time-varying scalar data. This data structure only stores voxels that are changing between time-steps or during transfer function updates. It allows efficient updates of data necessary for rendering during a sequence of queries common during data exploration and visualization. The table is used... View full abstract»

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  • Combining point clouds and volume objects in volume scene graphs

    Publication Year: 2005, Page(s):127 - 235
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (603 KB) | HTML iconHTML

    This paper describes an extension to the technical framework of constructive volume geometry (CVG) in order to accommodate point clouds in volume scene graphs. It introduces the notion of point-based volume object (PBVO) that is characterized by the opacity, rather than the geometry, of a point cloud. It examines and compares several radial basis functions (RBFs), including the one proposed in thi... View full abstract»

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  • A simple and flexible volume rendering framework for graphics-hardware-based raycasting

    Publication Year: 2005, Page(s):187 - 241
    Cited by:  Papers (46)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (638 KB) | HTML iconHTML

    In this work we present a flexible framework for GPU-based volume rendering. The framework is based on a single pass volume raycasting approach and is easily extensible in terms of new shader functionality. We demonstrate the flexibility of our system by means of a number of high-quality standard and nonstandard volume rendering techniques. Our implementation shows a promising performance in a num... View full abstract»

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  • A simplified model for inhomogeneous subsurface scattering

    Publication Year: 2005, Page(s):63 - 228
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (411 KB) | HTML iconHTML

    There has been considerable interest in modeling realistic subsurface light scattering in materials such as marble, human skin, or clouds. Many of these models provide a solution for the transport equation in a homogeneous or layered scattering media. The model we present here exploits a diffusion mechanism to provide a simpler solution to the transport equation. Treating light flux as current we ... View full abstract»

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  • Simplification of unstructured tetrahedral meshes by point sampling

    Publication Year: 2005, Page(s):157 - 238
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (548 KB) | HTML iconHTML

    Tetrahedral meshes are widely used in scientific computing for representing 3D scalar, vector, and tensor fields. The size and complexity of some of these meshes can limit the performance of many visualization algorithms, making it hard to achieve interactive visualization. The use of simplified models is one way to enable the real-time exploration of these datasets. In this paper, we propose a no... View full abstract»

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  • Volumetric reconstruction, compression and rendering of natural phenomena from multi-video data

    Publication Year: 2005, Page(s):83 - 230
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (425 KB) | HTML iconHTML

    Lately, new methods for the acquisition of time-varying, volumetric data for photo-realistic rendering of semi-transparent, volumetric phenomena like fire and smoke have been developed. This paper presents a wavelet-coding and rendering approach for these volumetric sequences that exploits spatial as well as temporal coherence in the data. A space partitioning tree allows for efficient storage and... View full abstract»

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  • Volume rendering for high dynamic range displays

    Publication Year: 2005, Page(s):91 - 231
    Cited by:  Papers (3)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (523 KB) | HTML iconHTML

    Dynamic range restrictions of conventional displays limit the amount of detail that can be represented in volume rendering applications. However, high dynamic range displays with contrast ratios larger than 50,000 : 1 have recently been developed. We explore how these increased capabilities can be exploited for common volume rendering algorithms such as direct volume rendering and maximum projecti... View full abstract»

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  • Volume Graphics 2005 (IEEE Cat. No. 05EX1158)

    Publication Year: 2005
    Request permission for commercial reuse | PDF file iconPDF (39 KB)
    Freely Available from IEEE
  • [Blank page]

    Publication Year: 2005, Page(s): 0_2
    IEEE is not the copyright holder of this material | PDF file iconPDF (11 KB)
    Freely Available from IEEE
  • Volume Graphics 2005 - Eurographics/IEEE VGTC Workshop Proceedings - Fourth International Workshop on Volume Graphics

    Publication Year: 2005, Page(s): 1
    IEEE is not the copyright holder of this material | PDF file iconPDF (65 KB)
    Freely Available from IEEE