7,548 Works

Focus + Context Rendering of Structured Biomedical Data

Pascual Abellán, Anna Puig & Dani Tost
Eurographics Workshop on Visual Computing for Biomedicine

Functional Reactive Augmented Reality: Proof of Concept Using an Extended Augmented Desktop with Swipe Interaction

Joao Paulo Oliveira Marum, J. Adam Jones & H. Conrad Cunningham
Functional Reactive Programing (FRP) is a new paradigm that has been evolving and used in many different fields, i.e.: robotics, user interface and others. FRP was originally developed as a programming paradigm to handle animation and it has since been used as a replacement for the observer pattern in systems that require order and accuracy when handling large numbers of callbacks. Inaccuracy and ordering issues related to callbacks can negatively affect a user's experience when...

Task Taxonomy for Cartograms

Sabrina Nusrat & Stephen Kobourov
Cartograms are maps in which areas of geographic regions (countries, states) appear in proportion to some variable of interest (population, income). Despite the popularity of cartograms and the large number of cartogram variants, there are few studies evaluating the effectiveness of cartograms in conveying information. In order to design cartograms as a useful visualization tool and to be able to compare the effectiveness of cartograms generated by different methods, we need to study the nature...

Efficient Isotropic BRDF Measurement

Wojciech Matusik, Hanspeter Pfister, Matthew Brand & Leonard McMillan
In this paper we present novel reflectance measurement procedures that require fewer total measurements than standard uniform sampling approaches. First, we acquire densely sampled reflectance data for a large collection of different materials. Using these densely sampled measurements we analyze the general surface reflectance function to determine the local signal variation at each point in the function's domain. We then use wavelet analysis to derive a common basis for all of the acquired reflectance functions...

Local Goemetrical Feature with Spatial Context for Shape-based 3D Model Retrieval

Shun Kawamura, Kazuya Usui, Takahiko Furuya & Ryutarou Ohbuchi
Eurographics 2012 Workshop on 3D Object Retrieval

Low-Cost Real-Time 3D Reconstruction of Large-Scale Excavation Sites using an RGB-D Camera

Michael Zollhöfer, Christian Siegl, Bert Riffelmacher, Mark Vetter, Boris Dreyer, Marc Stamminger & Frank Bauer
Eurographics Workshop on Graphics and Cultural Heritage

Simulated Motion Artefact in Computed Tomography

Franck P. Vidal & Pierre-Frédéric Villard
We propose a simulation framework to simulate the computed tomography acquisition process. It includes five components: anatomic data, respiration modelling, automatic parametrisation, X-ray simulation, and tomography reconstruction. It is used to generate motion artefacts in reconstructed CT volumes. Our framework can be used to evaluate CT reconstruction algorithm with motion artefact correction in a controlled environment.

GI-Cube: An Architecture for Volumetric Global Illumination and Rendering

Frank Dachille & Arie Kaufman
SIGGRAPH/Eurographics Workshop on Graphics Hardware

Far-LoD: Level of Detail for Massive Sky View Factor Calculations in Large Cities

David Muñoz Novoa, Benoit Beckers, Gonzalo Besuievsky & Gustavo Patow
In many applications, such as in urban physical simulations or in the study of the effect of the solar impact at different scales, models with different levels of detail are required. In this paper we propose an efficient system for quickly computing the Sky View Factor (SVF) for any point inside a large city. To do that, we embed the city into a regular grid, and for each cell we select a subset of the...

Styrian Diversity Visualisation: Visualising Statistical Open Data with a LeanWeb App and Data Server

Keith Andrews, Thomas Traunmüller, Thomas Wolkinger, Eva Goldgruber, Robert Gutounig & Julian Ausserhofer
Statistical open data is usually provided only in the form of spreadsheets or CSV files. The developers of open data apps must either restrict themselves to managable bite-sized chunks of data, which can be consumed (read, parsed, and held in memory) in one go, or must install and maintain their own data server which the app can query on demand. The Styrian Diversity Visualisation (in German ''Steirische Vielfalt Visualisiert'' or SVV) project demonstrates the use...

A Survey of Graph-Based Representations and Techniques for Scientific Visualization

Chaoli Wang
Graphs represent general node-link diagrams and have long been utilized in scientific visualization for data organization and management. However, using graphs as a visual representation and interface for navigating and exploring scientific data sets has a much shorter history yet the amount of work along this direction is clearly on the rise in recent years. In this paper, we take a holistic perspective and survey graph-based representations and techniques for scientific visualization. Specifically, we classify...

Automatic Lighting Design from Photographic Rules

Jérémy Wambecke, Romain Vergne, Georges-Pierre Bonneau & Joëlle Thollot
Lighting design is crucial in 3D scenes modeling for its ability to provide cues to understand the objects shape. However a lot of time, skills, trials and errors are required to obtain a desired result. Existing automatic lighting methods for conveying the shape of 3D objects are based either on costly optimizations or on non-realistic shading effects. Also they do not take the material information into account. In this paper, we propose a new method...

The State of the Art in Visualizing Group Structures in Graphs

Corinna Vehlow, Fabian Beck & Daniel Weiskopf
Graph visualizations encode relationships between objects. Abstracting the objects into group structures provides an overview of the data. Groups can be disjoint or overlapping, and might be organized hierarchically. However, the underlying graph still needs to be represented for analyzing the data in more depth. This work surveys research in visualizing group structures as part of graph diagrams. A particular focus is the explicit visual encoding of groups, rather than only using graph layout to...

Exact From-Region Visibility Culling

S. Nirenstein, E. Blake & J. Gain
To pre-process a scene for the purpose of visibility culling during walkthroughs it is necessary to solve visibility from all the elements of a finite partition of viewpoint space. Many conservative and approximate solutions have been developed that solve for visibility rapidly. The idealised exact solution for general 3D scenes has often been regarded as computationally intractable. Our exact algorithm for finding the visible polygons in a scene from a region is a computationally tractable...

ID-Based Rendering of Silhouettes on GPU

Engin Deniz Diktas & Ali Vahit Sahiner
Theory and Practice of Computer Graphics

On Establishing Visualization Requirements: A Case Study in Product Costing

Zana Vosough, Rainer Groh & Hans-Jörg Schulz
The process of identifying visualization requirements is an important part of every visualization researcher's and practitioner's job. Nevertheless, the scientific literature is rather sparse on this topic, usually resorting to some form of user-centered design that is rarely further detailed. In this paper, we give an account of our procedure, our results, our problems and solutions for gathering visualization requirements in an ongoing business project to introduce visualization to the field of product costing. By...

Isotopic Approximation of Implicit Curves and Surfaces

Simon Plantinga & Gert Vegter
Symposium on Geometry Processing

Interactive Direct Volume Rendering of Time-Varying Data

John Clyne & John M. Dennis
Previous efforts aimed at improving direct volume rendering performance have focused largely on time-invariant, 3D data. Little work has been done in the area of interactive direct volume rendering of timevarying data, such as is commonly found in Computational Fluid Dynamics (CFD) simulations. Until recently, the additional costs imposed by time-varying data have made consideration of interactive direct volume rendering impracticaL. We present a volume rendering system based on a parallel implementation of the Shear-Warp...

3D Models in Computer-Assisted Chemistry

Michel Roch, Isabelle Cretegny & Jacques Weber
Novel and efficient algorithms have been developed in order to display on a raster scan device some basic 3D models used in computer-assisted chemistry. They allow, among other things, the construction and manipulation of the geometrical structure, or shape, of chemical species containing several hundreds of atoms, both as simple skeleted and sophisticated 3D space filling models with Gouraud shading and hiddensurface treatment. In addition, the technique of image storing is used in order to...

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