Now showing items 1-20 of 27

    • Real-Time Volume Rendering for Virtual ColonoscopyS 

      Li, Wei; Kaufman, Arie; Kreeger, Kevin (The Eurographics Association, 2001)
      We present a volume rendering system that is capable of generating high-quality images of large volumetric data (e.g., 512<sup>3</sup>) in real time (30 frames or more per second). The system is particularly ...
    • A Framework to Visualize and Interact with Multimodal Medical Images 

      Manssour, Isabel; Furuie, Sergio; Nedel, Luciana; Freitas, Carla (The Eurographics Association, 2001)
      The simultaneous use of images obtained from different sources is common in medical diagnosis. However, even though the quality of these images has been improving, the integration of multimodality data into a unique 3D ...
    • Two-Pass Image and Volume Rotation 

      Chen, Baoquan; Kaufman, Arie (The Eurographics Association, 2001)
      We present a novel two-pass approach for both 2D image and 3D volume rotation. Each pass is a pseudo shear. However, it has a similar regularity as a pure shear in that a beam remains rigid while being sheared. Furthermore, ...
    • Volume Visualization of Payoff Regions for Derivatives Risk Management 

      Fei, Tan Toh; Prakash, Edmond Cyril (The Eurographics Association, 2001)
      Volume visualization of derivatives helps us discover risks, which hitherto have been elusive with traditional surface plots. In this paper, we would like to address the volatility visualization issue, which is one of the ...
    • EXOMIO: A 3D Simulator for External Beam Radiotherapy 

      Karangelis, Grigorios; Zamboglou, Nikolaos; Baltas, Dimos; Sakas, Georgios (The Eurographics Association, 2001)
      Simulators are medical devices used in the oncology clinics to perform the simulation procedure for the external beam radiotherapy treatment. Unlikely for a clinic to obtain a real Simulator is a high investment in terms ...
    • Translucent and Opaque Direct Volume Rendering for Virtual Endoscopy Applications 

      Meißner, Michael; Bartz, Dirk (The Eurographics Association, 2001)
      Virtual endoscopy applications frequently require the visual representation of several material interfaces to show the relevant data feature to the user. This requires the specification of complex transfer function which ...
    • A Survey of Methods for Volumetric Scene Reconstruction from Photographs 

      Slabaugh, Greg; Culbertson, Bruce; Malzbender, Tom; Schafer, Ron (The Eurographics Association, 2001)
      Scene reconstruction, the task of generating a 3D model of a scene given multiple 2D photographs taken of the scene, is an old and difficult problem in computer vision. Since its introduction, scene reconstruction has found ...
    • Data Level Comparison of Surface Classification and Gradient Filters 

      Kim, Kwansik; Wittenbrink, Craig M.; Pang, Alex (The Eurographics Association, 2001)
      Surface classification and shading of three dimensional scalar data sets are important enhancements for direct volume rendering (DVR). However, unlike conventional surface rendering, DVR algorithms do not have explicit ...
    • Topology-Guided Downsampling 

      Kraus, Martin; Ertl, Thomas (The Eurographics Association, 2001)
      We present a new downsampling method for structured volmue grids, which preserves much more of the topology of a scalar field than existing downsampling methods by preferable selecting scalar values of critical points. In ...
    • An Architecture For Interactive Tetrahedral Volume Rendering 

      King, Davis; Wittenbrink, Craig M.; Wolters, Hans J. (The Eurographics Association, 2001)
      We present a new architecture for interactive unstructured volume rendering. Our system moves all the computations necessary for order-independent transparency and volume scan conversion from the CPU to the graphics hardware, ...
    • Image-Based Rendering of Surfaces from Volume Data 

      Chen, Baoquan; Kaufman, Arie; Tang, Qingyu (The Eurographics Association, 2001)
      We present an image-based rendering technique to accelerate rendering of surfaces from volume data. We cache the fully volume rendered image (called keyview) and use it to generate novel views without ray-casting every ...
    • Segmentation of Biological Volume Datasets Using a Level-Set Framework 

      Whitaker, Ross; Breen, David; Museth, Ken; Soni, Neha (The Eurographics Association, 2001)
      This paper presents a framework for extracting surface models from a broad variety of volume datasets. These datasets are produced from standard 3D imaging devices, and are all noisy samplings of complex biological structures ...
    • Parallelizing the ZSWEEP Algorithm for Distributed-Shared Memory Architectures 

      Farias, Ricardo; Silva, Claudio T. (The Eurographics Association, 2001)
      In this paper we describe a simple parallelization of the ZSWEEP algorithm for rendering unstructured volumetric grids on distributed-shared memory machines, and study its performance on three generations of SGI multiprocessors, ...
    • Correction of Voxelization Artifacts by Revoxelization 

      Sramek, Milos; Dimitrov, Leonid I.; Bærentzen, J. Andreas (The Eurographics Association, 2001)
      Earlier proposed antialiasing techniques for voxelization of geometric objects in some cases do not result in completely alias-free data and image renditions. This is often the case for some implicit solids and CSG trees. ...
    • A Study of Transfer Function Generation for Time-Varying Volume Data 

      Jankun-Kelly, T.J.; Ma, Kwan-Liu (The Eurographics Association, 2001)
      The proper usage and creation of transfer functions for time-varying data sets is an often ignored problem in volume visualization. Although methods and guidelines exist for time-invariant data, little formal study for the ...
    • Hierarchical Perspective Volume Rendering Using Triangle Fans 

      Schussman, Greg; Max, Nelson (The Eurographics Association, 2001)
      We present a method of accelerated perspective volume rendering using cell projection, triangle fans, and a data hierarchy. The hierarchy allows mixed resolution rendering, greatly increasing speed. We utilize triangle ...
    • Accelerating Voxel-Based Terrain Rendering with Keyframe-Free Image-Based Rendering 

      Qin, Jiafa; MingWan,; Qu, Huamin; Kaufman, Arie (The Eurographics Association, 2001)
      We propose a voxel-based terrain rendering method which incorporates a novel keyframe-free image-based rendering algorithm and a new heuristic ray coherence raycasting algorithm. The current image is generated by warping ...
    • A Technique for Volumetric CSG based on Morphology 

      Baerentzen, A.; Christensen, N. J. (The Eurographics Association, 2001)
      In this paper, a new technique for volumetric CSG is presented. The technique requires the input volumes to correspond to solids which fulfill a voxelization suitability criterion. Assume the CSG operation is union. The ...
    • Splatting With Shadows 

      Nulkar, Manjushree; Mueller, Klaus (The Eurographics Association, 2001)
      In this paper we describe an efficient approach to add shadows to volumetric scenes. The light emitted by the lightsource is properly attenuated by the intervening volumetric structures before it is reflected towards the ...
    • Volume Graphics Modeling of Ice Thawing 

      Fujishiro, Issei; Aoki, Etsuko (The Eurographics Association, 2001)
      Image synthesis of natural phenomena is one of the fundamental research areas in volume graphics. Since the pursuit of photoreality requires physically-based computation at the cost of interactivity, much more attention ...