7,548 Works

DIRT: Deferred Image-based Ray Tracing

Konstantinos Vardis, Andreas-Alexandros Vasilakis & Georgios Papaioannou
We introduce a novel approach to image-space ray tracing ideally suited for the photorealistic synthesis of fully dynamic environments at interactive frame rates. Our method, designed entirely on the rasterization pipeline, alters the acceleration data structure construction from a per-fragment to a per-primitive basis in order to simultaneously support three important, generally conflicting in prior art, objectives: fast construction times, analytic intersection tests and reduced memory requirements. In every frame, our algorithm operates in two...

Virtual Hair Handle: A Model for Haptic Hairstyling

Ugo Bonanni & Petr Kmoch
Eurographics 2008 - Short Papers

Representing Tolerance Information in Feature-Based Solid Modelling

Bianca Falcidieno & Bruno Fossati
In this paper a system for defining dimensions and tolerances is presented which deals with the geometric representation of the objects in a coherent and compact way. This model is a combination of a hierarchical boundary model to represent geometry of the object with features and a relational graph model to encode dimensions and tolerances. In this way, the proposed model can be considered a ”product model” that, besides geometric and topological information about the...

An Art-based Approach to Visual Analytics

Gunjan Sehgal & Geetika Sharma
In this paper, we propose an art-based approach to visual analytics.We argue that while artistic data visualizations have mainly been designed to communicate the artist's message, certain artistic styles can be very effective in exploratory data analysis as well and data visualizations can benefit from more than just the aesthetics inspired by art. We use the ancient Warli style of tribal paintings, found in western India to demonstrate the use of artistic styles for visual...

LIVE@WEB.COM – Using CBIR Technology in InteractiveWeb-TV

Felix Morsdorf & Stephan Volmer
The increasing amount of internet based television broadcasts has lead to new approachs to interactivity in TV programs. We developed a system which is able to supply the viewer of the program upon interaction with information relating to the program, only based on the low-level visual content of the scene. This aim is achieved by comparing signatures describing the visual content of single frames of the video with a remote database of signatures derived from...

In Situ and Post Processing Workflows for Asteroid Ablation Studies

John M. Patchett, Boonthanome Nouanesengsy, Galen Gisler, James Ahrens & Hans Hagen
Simulation scientists need to make decisions about what and how much output to produce. They must balance their ability to efficiently ingest the analysis with their ability to get more analysis. We study this balance as a tradeoff between flexibility of saved data products and accessibility of saved data products. One end of the spectrum is raw data that comes directly from the simulation, making it highly flexible, but inaccessible due to its size and...

Sorted Pipeline Image Composition

Marcus Roth & Dirk Reiners
Eurographics Symposium on Parallel Graphics and Visualization

Illustrative Visualization for Medicine and Science

I. Viola, M. C. Sousa, D. Ebert, B. Andrews, B. Gooch & C. Tietjen
Eurographics 2006: Tutorials

Message-Based Object-Oriented Interaction Modeling

David E. Breen & Volker Kühn
This paper describes a message-based object-oriented tool for exploring mathematically-based interactions which produce complex motions for computer animation. The tool has been implemented as an object in the object-oriented computer animation system The Clockworks. It supports the definition of complex interactions between geometric objects through the specification of messages to the interacting objects. Our approach is general, flexible and powerful. The tool itself is not hardcoded to a particular application. It simply sends the messages...

Volume Visualization of Payoff Regions for Derivatives Risk Management

Tan Toh Fei & Edmond Cyril Prakash
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 critical components in Option pricing, by incorporating volume visualization for better risk management. By enabling the visualization of volatility changes in risk profiling, combining with another two Option’s value determinants (i.e. the underlying asset spot price and days to maturity), a...

Tridiagonal Matrix Formulation for Inextensible Hair Strand Simulation

Dongsoo Han & Takahiro Harada
Workshop on Virtual Reality Interaction and Physical Simulation

Detecting Dynamic Occlusion in front of Static Backgrounds for AR Scenes

Jan Fischer, Holger Regenbrecht & Gregory Baratoff
Correctly finding and handling occlusion between virtual and real objects in an Augmented Reality scene is essential for achieving visual realism. Here, we present an approach for detecting occlusion of virtual parts of the scene by natural occluders. Our algorithm is based on a graphical model of static backgrounds in the natural surroundings, which has to be acquired beforehand. The design of the approach aims at providing real-time performance and an easy integration into existing...

Stylizing Motion with Drawings

Yin Li, Michael Gleicher, Ying-Qing Xu & Heung-Yeung Shum
In this paper, we provide a method that injects the expressive shape deformations common in traditional 2D animation into an otherwise rigid 3D motion captured animation. We allow a traditional animator to modify frames in the rendered animation by redrawing the key features such as silhouette curves. These changes are then integrated into the animation. To perform this integration, we divide the changes into those that can be made by altering the skeletal animation, and...

Spline Approximation of General Volumetric Data

C. Roessl, , F. Zeilfelder , G. Nuernberger & H. P. Seidel
We present an efficient algorithm for approximating huge general volumetric data sets, i.e. the data is given over arbitrarily shaped volumes and consists of up to millions of samples. The method is based on cubic trivariate splines, i.e. piecewise polynomials of total degree three defined w.r.t. uniform type-6 tetrahedral partitions of the volumetric domain. Similar as in the recent bivariate approximation approaches (cf. [10, 15]), the splines in three variables are automatically determined from the...

GPU Smoke Simulation on Compressed DCT Space

Daichi Ishida, Ryoichi Ando & Shigeo Morishima
This paper presents a novel GPU-based algorithm for smoke animation. Our primary contribution is the use of Discrete Cosine Transform (DCT) compressed space for efficient simulation. We show that our method runs an order of magnitude faster than a CPU implementation while retaining visual details with a smaller memory usage. The key component of our method is an on-the-fly compression and expansion of velocity, pressure and density fields. Whenever these physical quantities are requested during...

Visualisation of Digital Terrain Data

Rolf Thiemann, Joachim Fischer, Guido Haschek & Gerald Kneidl
Visualisation technology has found practical application in the field of terrain data processing. A raster data base (RDB-) concept will be introduced, i.e. a multi-dimensional concept of terrain data using elevation data, description data and/or aerial image or satellite data. Other data sources in raster or vector form may also be considered. Methods of 2- and 3-D-imaging of terrain data are pre- sented. Two-dimensional presentation will include grey- and colorcoding of different RDB layers. Techniques...

Parallelized Global Brain Tractography

Stefan Philips, Mario Hlawitschka & Gerik Scheuermann
Vision, Modeling & Visualization

Measuring the Perception of Visual Realism in Images

Paul Rademacher, Jed Lengyel, Edward Cutrell & Turner Whitted
One of the main goals in realistic rendering is to generate images that are indistinguishable from photographs – but how do observers decide whether an image is photographic or computer-generated? If this perceptual process were understood, then rendering algorithms could be developed to directly target these cues. In this paper we introduce an experimental method for measuring the perception of visual realism in images, and present the results of a series of controlled human subject...

Accelerated Diffusion Operators for Enhancing DW-MRI

Paulo Rodrigues, Remco Duits, Bart M. Ter Haar Romeny & Anna Vilanova
Eurographics Workshop on Visual Computing for Biology and Medicine

Frontiers in 3D Photography: Reflectance and Motion

Steve Seitz
The last decade has seen great progress in 3D shape capture technology, both in terms of research ad- vances and successful commercial systems. So why don't most people own 3D cameras? Aside from such issues as expense and size, there remain fundamental technical problems that restrict the applicability of the current state of the art. One of these problems is modeling realistic materials. If you look around, you'll notice that most objects are shiny and...

'Them again?'' Dynamic Communities in the Media

Haolin Ren, Marie-Luce Viaud & Guy Melançon
Television, radio and the press invite people to publicly debate or discuss. Commonly enough, the audience experiences the ''Them again!'' impression, that is the impression to either ear the same stories being discussed or see the same actors and commentators on the medias. Conversely, politicians - among other public figures - may complain of not getting proper, or worse, biased coverage or presence in the media. Is this just an impression or is it a...

PubViz: Lightweight Visual Presentation of Publication Data

Alexander Rind, Andrea Haberson, Kerstin Blumenstein, Christina Niederer, Markus Wagner & Wolfgang Aigner
Publications play a central role in presenting the outcome of scientific research but are typically presented as textual lists, whereas related work in visualization of publication focuses on exploration - not presentation. To bridge this gap, we conducted a design study of an interactive visual representation of publication data in a BibTeX file. This paper reports our domain and problem characterization as well as our visualization design decisions in light of our user-centered design process...

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