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Evaluation of areal touch feedback for palpation simulation

Evaluation of areal touch feedback for palpation simulation

引用

VIS 05: IEEE visualization 2005, Proceedings

作者： Park, Jinah Kim, Sang Youn Kyung, Ki Uk Kwon, Dong Soo Computer Graphics and Visualization Laboratory Information and Communications University Korea Republic of Telerobotics and Control Laboratory Korea Advanced Institute of Science and Technology Korea Republic of Samsung Advanced Institute of Technology Korea Republic of

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Particle-based fluid-fluid interaction 05

Particle-based fluid-fluid interaction

引用

Proceedings of the 2005 ACM SIGGRAPH/Eurographics symposium on computer animation

作者： Müller, Matthias Solenthaler, Barbara Keiser, Richard Gross, Markus NovodeX AG Zürich AGEIA Inc. St. Louis United States Visualization and Multimedia Lab. University of Zürich Switzerland Computer Graphics Lab. ETH Zürich Switzerland

ISBN: (纸本)9781595931986

The interesting and complex behavior of fluids emerges mainly from interaction processes. While interactions of fluids with static or dynamic solids has caught some attention in computer graphics lately, the mutual interaction of different types of fluids such as air and water or water and wax has received much less attention although these types of interaction are the basis for a variety of important phenomena. In this paper we propose a new technique to model fluid-fluid interaction based on the Smoothed Particle Hydrodynamics (SPH) method. For the simulation of air-water interaction, air particles are generated on the fly only where needed. We also model dynamic phase changes and interface forces. Our technique makes possible the simulation of phenomena such as boiling water, trapped air and the dynamics of a lava lamp. © 2010 ACM.

关键词： Air

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Liquid 2D scatter space for file system browsing

Liquid 2D scatter space for file system browsing

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International Conference on Information Visualisation (IV)

作者： C. Waldeck ZGDV-Computer Graphics Center Department Z3 (MIV: Mobile Information Visualization) Infoverse Organisation

This (video-) paper describes a user interface concept, which facilitates multidimensional visual queries, filtering and browsing of the file system at the same time by means of the "liquid scatter space" (LSS) concept (Waldeck, 2004). The UI concept is based on an advanced star field display (Ahlberg & Shneiderman, 1994) using liquid browsing (Waldeck, 2004) and selection based (sketch-) queries. It allows realtime search and browsing at the same time (integrated into one single user interface) and can visualize the most important file system meta data dimensions simultaneously: 1. filename; 2. creation/modification date; 3. filesize; 4. filetype; and 5. label. LSS provides very fast and easy visual data mining possibilities for the desktop and makes it possible to perceive complex dependencies between the most important file system meta data properties at a glance. It also overcomes the "hidden-deep-down-in-hierarchy-structures"-problem by making it possible to use folders for structuring but not being bound to them. This paper focuses on visual design and interaction aspects and emphasizes the importance of paying regard to visual interactive details for information visualization and interaction interfaces and the need of making it easy to use.

关键词： Scattering File systems Data visualization Operating systems Navigation computer graphics Lenses Sorting Shape Animation

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visualization for validation and improvement of three-dimensional segmentation algorithms

Visualization for validation and improvement of three-dimens...

引用

7th Joint Eurographics - IEEE VGTC Symposium on visualization, VisSym 2005

作者： Weber, G.H. Luengo Hendriks, C.L. Keränen, S.V.E. Dillard, S.E. Ju, D.Y. Sudar, D. Hamann, B. Berkeley Drosophila Transcription Network Project Visualization and Computer Graphics Research Group Institute for Data Analysis and Visualization University of California Davis One Shields Avenue DavisCA95616 United States Genomics and Life Sciences Division Lawrence Berkeley National Laboratory One Cyclotron Road BerkeleyCA94720 United States

ISBN: (纸本)3905673193

The Berkeley Drosophila Transcription Network Project (BDTNP) is developing a suite of methods that will allow a quantitative description and analysis of three dimensional (3D) gene expression patterns in an animal with cellular resolution. An important component of this approach are algorithms that segment 3D images of an organism into individual nuclei and cells and measure relative levels of gene expression. As part of the BDTNP, we are developing tools for interactive visualization, control, and verification of these algorithms. Here we present a volume visualization prototype system that, combined with user interaction tools, supports validation and quantitative determination of the accuracy of nuclear segmentation. visualizations of nuclei are combined with information obtained from a nuclear segmentation mask, supporting the comparison of raw data and its segmentation. It is possible to select individual nuclei interactively in a volume rendered image and identify incorrectly segmented objects. Integration with segmentation algorithms, implemented in MATLAB, makes it possible to modify a segmentation based on visual examination and obtain additional information about incorrectly segmented objects. This work has already led to significant improvements in segmentation accuracy and opens the way to enhanced analysis of images of complex animal morphologies. © The Eurographics Association 2005.

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Illustrative visualization

Illustrative visualization

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VIS 05: IEEE visualization 2005, Proceedings

作者： Viola, Ivan Gröller, Meister E. Hadwiger, Markus Bühler, Katja Preim, Bernhard Sousa, Mario Costa Ebert, David S. Stredney, Don Kanitsar, Armin Bruckner, Stefan Grimm, Sören Svakhine, Nikolai A. Jang, Yun Gaithert, Kelly Tietjen, Christian Krüger, Arno Peitgen, Heinz-Otto Isenberg, Tobias Hintze, Jana Hertel, Ilka Strauß, Gero Institute of Computer Graphics and Algorithms Vienna University of Technology Austria VRVis Research Center Vienna Austria Department of Simulation and Graphics University of Magdeburg Germany Department of Computer Science University of Calgary Canada School of Electrical and Computer Engineering Purdue University United States Ohio Supercomputer Center United States Institute of Computer Graphics and Algorithms Vienna University of Technology Austria VRVis Research Center Vienna Austria Electrical and Computer Engineering Purdue University United States IEEE Austria Department of Computer Science University of Calgary Canada Department of Computer Science Computer Graphics Research Lab. University of Calgary Canada Purdue University United States Ohio Supercomputer Center United States University of Texas Austin United States Interface Laboratory United States Biomedical Applications United States Department of Simulation and Graphics Otto-von-Guericke-University of Magdeburg Germany Otto-von-Guericke-University of Magdeburg FIN/ISG Germany Institute for Simulation and Graphics Department for Computer Science Otto-von-Guericke-University of Magdeburg Universitaetsplatz 2 39106 Magdeburg Germany Center for Medical Diagnosic Systems and Visualization Universitaetsallee 29 28359 Bremen Germany Department of Simulation and Graphics Otto-von-Guericke University of Magdeburg Germany ENT Department University Hospital of Leipzig Germany

ISBN: (纸本)0780394623

The tutorial presents state-of-the-art visualization techniques inspired by traditional technical and medical illustrations. Such techniques exploit the perception of the human visual system and provide effective visual abstractions to make the visualization clearly understandable. Visual emphasis and abstraction has been used for expressive presentation from prehistoric paintings to nowadays scientific and medical illustrations. Many of the expressive techniques used in art are adopted in computer graphics, and are denoted as illustrative or non-photorealistic rendering. Different stroke techniques, or brush properties express a particular level of abstraction. Feature emphasis or feature suppression is achieved by combining different abstraction levels in illustrative rendering. Challenges in visualization research are very large data visualization as well as multi-dimensional data visualization. To effectively convey the most important visual information there is a significant need for visual abstraction. For less relevant information the dedicated image space is reduced to enhance more prominent features. The discussed techniques in the context of scientific visualization are based on iso-surfaces and volume rendering. Apart from visual abstraction, i.e., illustrative representation, the visibility of prominent features can be achieved by illustrative visualization techniques such as cut-away views or ghosted views. The structures that occlude the most prominent information are suppressed in order to clearly see more interesting parts. A different smart way to provide information on the data is using exploded views or other types of deformation. Furthermore intuitive feature classification via 3D painting and manipulation with the classified data including label placement is presented. Discussed non-photorealistic and illustrative techniques from visualization and graphics are shown from the perspective as tools for illustrators from medicine, botany, archeology

关键词： visualization

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2D/3D non-rigid registration of volumetric CT lung data using thin-plate spline

2D/3D non-rigid registration of volumetric CT lung data usin...

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International Conference on e-health Networking, Applications and Services (HealthCom)

作者： J. Kim H. Park Digital Ocean & Virtual Environment Center Korea Ocean Research and Development Institute South Korea Computer Graphics & Visualization Laboratory Information and Communications University South Korea

In the medical image analysis for the human organs, non-rigid registration is necessary to properly register the local deformation. Especially for the dynamic organs like a heart and lungs, it is essential to process the registration method in three-dimensional space to track their through-plane motion. In this paper, we suggest the 2D/3D non-rigid registration method based on the corresponding anatomical landmarks using thin-plate spline (TPS). By extending two-dimensional TPS, we developed 3D TPS and computed its bending energy function to register the local deformations of the volumetric time-varying lung CT data. Our experimental results show that our method is suitable for handling volumetric deformation with a small number of anatomical landmarks.

关键词： Lungs Spline Biomedical imaging Computed tomography Humans Image registration Oceans Registers Heart Tracking

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Real-time 3D graphics systems: From simulators to virtual studios

Real-time 3D graphics systems: From simulators to virtual st...

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15th International Conference on computer graphics and Vision, GraphiCon 2005

作者： Dolgovesov, Boris S. Mazurok, Boris S. Shevtsov, Maxim U. V.rukhlinskiy, Alexey Morozov, Boris B. Fomichev, Vladimir M. V.pekarskiy, Alexandr Naumov, B.A. Laboratory of Synthesizing Visualization Systems Institute of Automation and Electrometry Russia Novosibirsk State University Russia Institute of Automation and Electrometry Russia Computer Graphics Laboratory Department of IAE Russia Institute of Microprocessor Computer Systems RAS Nakhimovsky prospect 36/1 Moscow GSP-7 117997 Russia Cosmonaut Training Yu. A. Gagarin Russian State Scientific-Research and Test Centre of Russia Administrative Department Cosmonaut Training Yu. A. Gagarin Russian State Scientific-Research and Test Centre Russia

The paper deal with 3D graphics simulators history. Several generation of space simulators that were used in training centers including Yu. A. Gagarin Russian State Scientific-Research and Test Centre of Cosmonaut Training (Moscow, Russia) are discussed. Number of US-Russia international space station programs use these cosmonaut training system in order to increase the efficiency of crews' space activities, and to ensure safe manned flights. Today we introduce powerful PC-based solution for Virtual Studio. Formal requirements for such a system are declared and its distributed architecture implementation is briefly outlined.

关键词： Simulators

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UberFlow: A GPU-based particle engine 04

UberFlow: A GPU-based particle engine

引用

ACM SIGGRAPH 2004 Sketches

作者： Kipfer, Peter Segal, Mark Westermann, Rüdiger Computer Graphics and Visualization Technische Universitát München ATI Research Germany

ISBN: (纸本)9781581138962

We present a system for real-time animation of large particle sets using GPU computation and memory objects in OpenGL. Our system implements a versatile particle engine, including inter-particle collisions and visibility sorting. By combining memory objects with floating-point fragment programs, we have implemented a particle engine that entirely avoids the transfer of particle data at runtime. © 2004 ACM.

关键词： Engines

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On triangulations

引用

International Conference on Computational Science and its Applications, ICCSA 2004

作者： Kolingerová, Ivana Centre of Computer Graphics and Data Visualization Department of Computer Science and Engineering University of West Bohemia Plze Czech Republic

ISBN: (纸本)3540220569

Triangulations in 2D and 3D are a necessary part of many applications. This paper brings a brief survey of main triangulations used in computer graphics and computational geometry, then focuses on Delaunay and greedy triangulations in 2D and 3D and presents their most important properties and algorithms. Then three applications from computer graphics and image processing areas are presented and results discussed. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Triangulation

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Out-of-core interactive display of large meshes using an oriented bounding box-based hardware depth query

Out-of-core interactive display of large meshes using an ori...

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Proceedings of the Seventh IASTED International Conference on computer graphics and Imaging

作者： Ha, Haeyoung Gregorski, Benjamin F. Joy, Kenneth I. Visualization/Comp. Graphics Grp. Department of Computer Science University of California Davis Davis CA United States

In this paper we present an occlusion culling method that uses hardware-based depth queries on oriented bounding boxes to cull unseen geometric primitives efficiently. An out-of-core design enables this method to interactively display data sets that are too large to fit into main memory. During a preprocessing phase, a spatial subdivision (such as an octree or BSP tree) of a given data set is constructed where, for each node, an oriented bounding box containing mesh primitives is computed using principal component analysis (PCA). At runtime, the tree indicated by the spatial subdivision is traversed in front-to-back order, and only nodes that are determined to be visible, based on a hardware accelerated depth query, are rendered.

关键词： Interactive computer graphics

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