Browsing VG01: Volume Graphics Workshop 2001 by Issue Date

Now showing items 1-20 of 27

    • 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 ...

    • 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. ...

    • Efficient Space Leaping for Ray casting Architectures 

      Meißner, M.; Doggett, M.; Hirche, J.; Kanus, U. (The Eurographics Association, 2001)
      One of the most severe problems for ray casting architectures is the waste of computation cycles and I/O bandwidth, due to redundant sampling of empty space. While several techniques exist for software implementations to ...

    • vlib: A Volume Graphics API 

      Winter, Andrew S.; Chen, Min (The Eurographics Association, 2001)
      This paper describes vlib, a generic application programming interface for volume graphics which supports many of the significant developments in the field to date. We present an overview of the interface and describe how ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Refraction in Discrete Ray Tracing 

      Rodgman, David; Chen, Min (The Eurographics Association, 2001)
      Refraction is an important graphics feature for synthesizing photorealistic images. This paper presents a study on refraction rendering in volume graphics using discrete ray tracing. We describe four basic approaches for ...

    • Extracting Boundary Surface of Arbitrary Topology from Volumetric Datasets 

      Duan, Ye; Qin, Hong (The Eurographics Association, 2001)
      This paper presents a novel, powerful reconstruction algorithm that can recover correct shape geometry as well as its unknown topology from arbitrarily complicated volumetric datasets. The algorithm starts from a simple ...

    • A Volume Modeling Component of CAD 

      Jianwen, Zhou; Feng, Lin; Soon, Seah Hock (The Eurographics Association, 2001)
      This paper presents a framework we have developed for modeling and manipulation of volumetric data sets. It is a set of new functions integrated into a CAD system. We shall address freeform modeling through voxelization ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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, ...