@techreport{Wimmer-1998-SMO, title = "Load Balancing for Smooth LODs", author = "Michael Wimmer and Dieter Schmalstieg", year = "1998", abstract = "The paper shows how to derive an analytic formula for the following problem: given a set of objects in a continuous level of detail representation, and given a total number of polygons to display, determine the number of polygons to use for each object so that the best overall appearance is achieved. This improves on the situation of discrete levels of detail, where the problem has been shown to be equivalent to a constrained knapsack-problem.", month = dec, number = "TR-186-2-98-31", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "smooth LODs, level of detail, load balancing, virtual environments", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Wimmer-1998-SMO/", } @techreport{Fuhrmann-1998-Occ, title = "Occlusion in Collaborative Augmented Environments", author = "Anton Fuhrmann and Gerd Hesina and Francois Faure and Michael Gervautz", year = "1998", abstract = "Augmented environments superimpose computer enhancements on the real world. Such augmented environments are well suited for collaboration of multiple users. To improve the quality and consistency of the augmentation the occlusion of real objects by computer-generated objects and vice versa has to be implemented. We present methods how this can be done for a tracked user's body and other real objects and how irritating artifacts due to misalignments can be reduced. Our method is based on simulating the occlusion of virtual objects by a representation of the user modeled as kinematic chains of articulated solids. Registration and modeling errors of this model are being reduced by smoothing the border between virtual world and occluding real object. An implementation in our augmented environment and the resulting improvements are presented.", month = dec, number = "TR-186-2-98-29", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "occlusion, augmented reality, virtual reality", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Fuhrmann-1998-Occ/", } @techreport{Mastal-1998-Rad, title = "Radiosity--Calculations for Rotational Surfaces", author = "Helmut Mastal and Robert F. Tobler and Werner Purgathofer", year = "1998", abstract = "Rotational Surfaces are very important for photorealistic representations of plants and other natural phenomena. In this paper radiosity calculations for rotational surfaces are presented that handle surfaces as whole objects rather than approximating them by large numbers of plane patches. Mathematical expressions are given for the radiance of cylinders, cones and spheres that are ideal Lambertian reflectors. Although there exists no complete radiosity algorithm which uses the formulae for cylinders, cones and spheres at the moment, it can be estimated that the number of objects of a global illumination scene as well as the number of interactions could be reduced dramatically. Therefore it should be possible to render more complex scenes with plants, like forests, in reasonable time.", month = oct, number = "TR-186-2-98-27", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "natural phenomena, rotational surfaces, radiosity", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Mastal-1998-Rad/", } @techreport{Wilkie-1998-Ase, title = "A Spectral Extension to the Tag Image File Format", author = "Alexander Wilkie and Robert F. Tobler and Werner Purgathofer", year = "1998", abstract = "We propose a simple, consistent and yet powerful extension to the Tagged Image File Format (commonly referred to as TIFF) that enables the user to store spectral image data.", month = oct, number = "TR-186-2-98-28", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "image file format, spectral rendering", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Wilkie-1998-Ase/", } @techreport{Schmalstieg-1998-Usi, title = "Using Transparent Props for Interaction with the Virtual Table", author = "Dieter Schmalstieg and L. Miguel Encarna\c{c}\~{a}o and Zsolt Szalav\'{a}ri", year = "1998", abstract = "The Virtual Table presents stereoscopic graphics to a user in a workbench-like setting. This paper reports on a user interface and new interaction techniques for the Virtual Table based on transparent props?a tracked hand-held pen and a pad. These props, but in particular the pad, are augmented with 3D graphics from the Virtual Table?s display. This configuration creates a very powerful and flexible interface for two-handed interaction that can be applied to other back-projected stereographic displays as well: the pad can serve as a palette for tools and controls as well as a window-like see-through interface, a plane-shaped and through-the-plane tool, supporting a variety of new interaction techniques.", month = oct, number = "TR-186-2-98-25", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "magic lenses, window tools, transparent props, two-handed interaction, augmented reality, virtual reality", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Schmalstieg-1998-Usi/", } @techreport{Loeffelmann-1998-SMURF, title = "Smurf -- a Smart surface model for advanced visualization techniques", author = "Helwig L\"{o}ffelmann and Thomas Theu{\ss}l and Andreas K\"{o}nig and Eduard Gr\"{o}ller", year = "1998", abstract = "Highly elaborated visualization techniques that are based on surfaces often are independent from the origin of the surface data. For re-using advanced visualization methods for surfaces of various kind, we developed an abstract surface interrogation layer called Smurf. In this paper we discuss the steps necessary to unify multiple types of surfaces under a shared general purpose interface.", month = oct, number = "TR-186-2-98-26", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "surfaces, visualization", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Loeffelmann-1998-SMURF/", } @techreport{Tobler-1998-DPO, title = "Designing a Parallel Object Oriented Graphics Framework", author = "Robert F. Tobler", year = "1998", abstract = "This paper aims to present a design strategy for graphics frameworks, that facilitates easy parallelization. This is achieved by introducing two mechanisms for dealing with the main issues of parallelization, that can be seamlessly integrated into graphics frameworks which have been designed adhering to a few implementation rules. These two main mechanisms are Remote Access Nodes, that mainly deal with memory distribution and memory access, and Parallelizing Group Nodes, that deal with task generation and load balancing. These objects are designed to fit into object oriented, scene--graph based frameworks, which can be used as a basis for most graphics based algorithms.", month = sep, number = "TR-186-2-98-34", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "Object-Oriented Design, Parallelization, Graphics Framework", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Tobler-1998-DPO/", } @techreport{Szir-1998-QMC, title = " Analysis of the Quasi-Monte Carlo Integration of the Rendering Equation", author = "L\'{a}szl\'{o} Szirmay-Kalos and Werner Purgathofer", year = "1998", abstract = "Quasi-Monte Carlo integration is said to be better than Monte-Carlo integration since its error bound can be in the order of $O(N^{-(1-\epsilon)})$ instead of the $O(N^{-0.5})$ probabilistic bound of classical Monte-Carlo integration if the integrand has finite variation. However, since in computer graphics the integrand of the rendering equation is usually discontinous and thus has infinite variation, the superiority of quasi-Monte Carlo integration has not been theoretically justified. This paper examines the integration of discontinuous functions using both theoretical arguments and simulations and explains what kind of improvements can be expected from the quasi-Monte Carlo techniques in computer graphics.", month = aug, number = "TR-186-2-98-24", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "Hardy-Krause vari ation, quasi-Monte Carlo quadrature, Rendering equation", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szir-1998-QMC/", } @techreport{Szir-1998-STAR, title = "Stochastic Methods in Global Illumination - State of the Art Report", author = "L\'{a}szl\'{o} Szirmay-Kalos", year = "1998", abstract = "This paper presents a state of the art report of those global illum ination algorithms which involve Monte-Carlo or quasi-Monte Carlo techniques. First it surveys the basic tasks of global illumination, which can be formulated as the solution of either the rendering or the potential equation, then reviews the basic solution techniques, including inversion, expansion and iteration. The paper explains why stochastic approaches are good to solve these integral equations and highlights what kind of fundamental choices we have when designing such an algorithm. It compares, for example, finite-element and continuous methods, pure Monte-Carlo and quasi-Monte Carlo techniques, different versions of importance sampling, Russian roulette, local and global visibility algorithms, etc. Then, a lot of methods are reviewed in a unified framework, that also allows to make comparisons. ", month = aug, number = "TR-186-2-98-23", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "error and complexity, first-shot, transillumination method, stochastic ray-radiosity, global ray-bundle tracing, instant radiosity, photon-map, bi-directional path tracing, light tracing, photon tracing, path tracing, distributed ray-tracing, Metropolis sampling, stochastic iteration, shooting and gathering random walks, Russian roulette, importance sampling, radiosity, finite-element techniques, Monte-Carlo and quasi-Monte Carlo quadra, potential equation, Rendering equation", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szir-1998-STAR/", } @techreport{Szir-1998-Stoch, title = "Stochastic Iteration for Non-diffuse Global Illumination", author = "L\'{a}szl\'{o} Szirmay-Kalos", year = "1998", abstract = "This paper presents a single-pass, view-dependent method to solve t he rendering equation, using a stochastic iterational scheme where the transport operator is selected randomly in each iteration. The requirements of convergence are given for the general case. To demonstrate the basic idea, a very simple, continuous random transport operator is examined, which gives back the light tracing algorithm incorporating Russian roulette. Then, a new mixed continuous and finite-element based iteration method is proposed, which uses ray-bundles to transfer the radiance in single random direction. The resulting algorithm is fast, it provides initial results in seconds and accurate solutions in minutes and does not suffer from the error accumulation problem and the high memory demand of other finite-element and hierarchical approaches.", month = aug, number = "TR-186-2-98-21", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "global ray-bundle tracing, light-tracing, Monte-Carlo Carlo integration, global radiance, Rendering equation", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szir-1998-Stoch/", } @techreport{Szir-1998-Glo, title = "Global Ray-bundle Tracing", author = "L\'{a}szl\'{o} Szirmay-Kalos", year = "1998", abstract = "The paper presents a single-pass, view-dependent method to solve th e general rendering equation, using a combined finite element and random walk approach. Applying finite element techniques, the surfaces are decomposed into planar patches on which the radiance is assumed to be combined from finite number of unknown directional radiance functions by predefined positional basis functions. The directional radiance functions are then computed by random walk or by stochastic iteration using bundles of parallel rays. To compute the radiance transfer in a single direction, several global visibility methods are considered, including the global versions of the painter's, z-buffer, Weiler-Atherton's and planar graph based algorithms. The method requires no preprocessing except for handling point lightsources, for which a first-shot technique is proposed. The new method is particularly efficient for scenes including not very specular materials illuminated by large area lightsources or sky-light. In order to increase the speed for difficult lighting situations, walks can be selected according to their importance. The importance can be explored adaptively by the Metropolis and VEGAS sampling techniques.", month = jul, number = "TR-186-2-98-18", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "z-buffer, Metropolis method, importance sampling, stochastic iteration, Monte-Carlo and quasi-Monte Carlo integr, global radiance, Rendering equation", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szir-1998-Glo/", } @techreport{Szir-1998-Obj, title = "Object-Oriented Framework and Methodology to Process Visualisation System Development", author = "L\'{a}szl\'{o} Szirmay-Kalos", year = "1998", abstract = "In this paper a process visualisation development system and its associated development methodology are presented. This methodology is optimised to systems that have complex structure and are built of large number of components belonging to relatively small number of types. In order to handle the complexity, the input requirements of the method is as close to the "native language" of the application as possible. The elements of the "native language" are assumed to include engineering drawings and manuals describing the operation of component types the system is built of. Graphics techniques are used to supply the engineering drawings into the development system while not only the required visual appearance is described but the structure of the underlying system is also defined. The elements of engineering drawings are dynamized to animate the graphics presentation to reflect the current state of the monitored system. Component manuals are transformed to interface and state definitions from which a code generator generates a C++ class for each component type. This C++ class must be tuned to reflect the operation of a single component type. >From these definitions the development system automatically builds up the complete visualisation program, providing easy and fast application development.", month = jul, number = "TR-186-2-98-19", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "model-view-controller paradigm, object-oriented design, process visualisation development system", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szir-1998-Obj/", } @techreport{Szir-1998-Ref, title = "New Simple Reflectance Models for Metals and other Specular Materia ls", author = "L\'{a}szl\'{o} Neumann and Attila Neumann and L\'{a}szl\'{o} Szirmay-Kalos", year = "1998", abstract = "The paper presents new, simple and physically plausible, but not physically based reflectance models for metals and other specular materials. The most important member of this family is the modification of the Phong model, which can eliminate its non-metallic characteristics. The new model gives back the ideal mirror in the limit case, is easier to compute than other known models and is particularly suitable for importance sampling to efficiently generate reflected directions in Monte-Carlo ray-tracing algorithms. Due to its simplicity, the new model can become an integral part of commercial CAD systems to describe the specular part or metallic behavior. The paper also examines the energy balance of the previously known and the newly proposed BRDFs concentrating on the behavior at grazing angles, and comes to the conclusion that the Ward and the Cook-Torrance models cannot guarantee energy balance and thus are not physically plausible. Finally, the generated images demonstrate how the metallic impression can be provided by the new models.", month = jul, number = "TR-186-2-98-17", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "importance sampling, albedo function, BRDF representation, Reflectance function", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szir-1998-Ref/", } @techreport{Szir-1998-Pump, title = "Analysis and Pumping of the Albedo Function", author = "L\'{a}szl\'{o} Neumann and Attila Neumann and L\'{a}szl\'{o} Szirmay-Kalos", year = "1998", abstract = "The paper introduces a method, called the albedo pumping-up, to derive new, physically plausible BRDFs from an existing one or from any symmetric function. This operation can be applied recursively by arbitrary number of times. An important application of this operation is the transformation of the Phong and Blinn models in order to make them produce metallic effects. The paper also examines the albedo function of reflectance models and comes to the conclusion that widely used models violate energy balance at grazing angles.", month = jul, number = "TR-186-2-98-20", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "perceptual based fitting, metal models, energy balance, albedo function, BRDF representation, Reflectance function", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szir-1998-Pump/", } @techreport{Berger-1998-Col, title = "Color-Table Animation of Fast Oriented Line Integral Convolution for Vector Field Visualization", author = "Siegrun Berger and Eduard Gr\"{o}ller", year = "1998", abstract = "Fast Oriented Line Integral Convolution (FROLIC), which is a variant of LIC, illustrates 2D vector fields by approximating a streamlet by a set of disks with varying intensity. FROLIC does not only show the direction of the flow but also its orientation. This paper presents color-table animation of FROLIC images. Various color-table compositions are discussed in detail. When animating FROLIC images visual artifacts (pulsation, synchronization) must be avoided. Several strategies in this respect are dealt with. Color-table animation of FROLIC has been implemented as Visual C++ application for Windows NT, whereby the calculation of the dynamical system is performed with Mathematica. This allows researchers from various disciplines to conveniently explore and investigate analytically defined 2D and 3D vector fields.", month = jul, number = "TR-186-2-98-22", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "color-table animation, Line Integral Convolution, FROLIC", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Berger-1998-Col/", } @techreport{Tobler-1998-FFA, title = "A new Form Factor Analogy and its Application to Stochastic Global Illumination Algorithms", author = "Robert F. Tobler and L\'{a}szl\'{o} Neumann and Mateu Sbert and Werner Purgathofer", year = "1998", abstract = "A new form factor analogy, that has been derived from results of integral geometry, is introduced. The new analogy is shown to be useful for stochastic evaluation of the local form of the rendering equation used in various Monte Carlo methods for calculating global illumination. It makes it possible to improve importance sampling in these methods, thereby speeding up convergence. A new class of bidirectional reflection distribution functions that directly benefits from the analogy and permits exact evaluation and calculation of correctly distributed vectors for Monte Carlo integration is presented.", month = jun, number = "TR-186-2-98-33", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "Sampling, BRDF, Global Illumination", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Tobler-1998-FFA/", } @techreport{fuhrmann-1998-reaX, title = "Real-TimeTechniques for 3D Flow Visualization", author = "Anton Fuhrmann and Eduard Gr\"{o}ller", year = "1998", abstract = "Visualization of three dimensional flow has to overcome a lot of problems to be effective. Among them are occlusion of distant details, lack of directional and depth hints and cluttering. In this paper we present methods which address these problems for realtime graphic representations applicable in virtual environments. We use animated, opacity-mapped streamlines as visualization icon for 3D flow visualization. We present a texture mapping technique to keep the level of texture detail along a streamline nearly constant even when the velocity of the flow varies considerably. An algorithm is described which distributes the dashtubes evenly in space. We apply magic lenses and magic boxes as interaction techniques for investigating densly filled areas without overwhelming the observer with visual detail. Implementation details of these methods and their integration in our virtual environment conclude the paper.", month = may, number = "TR-186-2-98-16", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "focussing, virtual reality, texture techniques, flow visualization, realtime", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/fuhrmann-1998-reaX/", } @techreport{Mroz-1998-Bri, title = "Bringing Your Visualization Application to the Internet", author = "Lukas Mroz and Helwig L\"{o}ffelmann and Eduard Gr\"{o}ller", year = "1998", abstract = "The Internet has a growing importance as a medium for presenting visualization and offering visualization tools. Due to strong variations in the quality of avaliable resources it is extremely difficult to design visualization systems including the Internet, which are capable of interactively visualizing user data. In this paper we identify requirements for a distributed visualization system to interactively visualize user data. As a possible solution to the identified problems we present a model for a visualization pipeline capable of fulfilling these requirements. Finally a proof-of-concept implementation of our ideas into Net Phase Plane, a visualization tool for dynamical systems, is discussed.", month = apr, number = "TR-186-2-98-14", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "interactivity, visualization over the internet", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Mroz-1998-Bri/", } @techreport{Mroz-1998-SelX, title = "Selected Trends in Scientific Visualization", author = "Lukas Mroz and Helwig L\"{o}ffelmann and Eduard Gr\"{o}ller", year = "1998", abstract = "Visualization became an important branch of scientific research during the past decade. Some topics of visualization, e.g., flow visualization and volume visualization, already provide lots of high-quality solutions to the most important problems. Others such as information visualization, are rather young disciplines which continuously provide lots of new advances. One such topic is the visualization over the Internet. Quite a number of approaches emerged during the last two years which facilitate this idea and embed the World Wide Web into the visualization process. Another trend in visualization is collaborative visualization within an augmented reality setup. Users exploit real 3D interaction and augmented reality to combine communication and investigation during research or education. Thirdly, the visualization of multi-dimensional and multi-modal data is a rather hot challenge to current scientific research. Coping with the restriction of just a few dimensions for representing visualization results is a big open problem in visualization and currently subject to eager research.", month = apr, number = "TR-186-2-98-15", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "augmented reality,information visualizat, web technologies, Visualization", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Mroz-1998-SelX/", } @techreport{Hesina-1998-ANEX, title = "A Network Architecture for Remote Rendering", author = "Gerd Hesina and Dieter Schmalstieg", year = "1998", abstract = "Internet-based virtual environments (VEs) let users explore multiple virtual worlds with many different geometric models which are downloaded rather than pre-distributed. To avoid long download times, we have developed a method that optimally utilizes network bandwidth by downloading only the exact portion of geometry that is necessary for rendering. The solution is based on progressive geometry data structures (smooth levels of detail) and selective download.", month = apr, number = "TR-186-2-98-02", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "distributed virtual environments, smooth levels of details, remote rendering", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Hesina-1998-ANEX/", } @techreport{Mantler-1998-DynX, title = "Dynamic Load Balancing in Distributed Virtual Environments", author = "Stephan Mantler and Dieter Schmalstieg", year = "1998", abstract = "This paper introduces a new approach for improving the scalability of distributed virtual environments by using a combination of visibility culling for communication and dynamic load balancing to keep the system load evenly distributed. Further communication optimizations as well as some preliminary results are presented.", month = apr, number = "TR-186-2-98-13", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "Collaboration, Load Balancing Distributed System, Network, Virtual Reality", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Mantler-1998-DynX/", } @techreport{Castro-1998-TFS, title = "Transfer Function Specification for the Visualization of Medical Data", author = "Silvia Castro and Andreas K\"{o}nig and Helwig L\"{o}ffelmann and Eduard Gr\"{o}ller", year = "1998", abstract = "The application of transfer functions to map data values to visual properties as, e.g., color and opacity, is a crucial step in direct volume rendering. Due to the complex relationship between the transfer function and the resulting image it is usually extremely difficult to model an appropriate mapping. In this paper we present an advanced transfer function specification scheme for the visualization of medical data. The concept of metadata is used to make the modeling of transfer functions more intuitive. A small number of parameters is sufficient to completely describe a transfer function, thus this specification scheme is suitable for (semi-)automated search techniques.", month = mar, number = "TR-186-2-98-12", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "volume rendering, multi-modal and multi-dimensional data v, visualization systems, visualization of medical data", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Castro-1998-TFS/", } @techreport{Loeffelmann-1998-VDS, title = "Visualizing Dynamical Systems near Critical Points", author = "Helwig L\"{o}ffelmann and Helmut Doleisch and Eduard Gr\"{o}ller", year = "1998", abstract = "In this paper we present two visualization techniques. One uses the topological structure of the dynamical system near critical points to build an abstract description of the flow. The other places bunches of streamlets around the critical points to visualize the flow characteristics locally. Combining both methods a powerful visualization technique is present, since both the topological information as well as intuitive visual cues are provided.", month = mar, number = "TR-186-2-98-09", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "visualization, dynamical systems, critical points, vector field topology", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Loeffelmann-1998-VDS/", } @techreport{Groeller-1998-VAD, title = "Visualization of Analytically Defined Dynamical Systems", author = "Eduard Gr\"{o}ller and Helwig L\"{o}ffelmann and Rainer Wegenkittl", year = "1998", abstract = "The visualization of analytically defined dynamical systems is important for a thorough understanding of the underlying system behavior. An overview of theoretical concepts concerning analytically defined dynamical systems is given. Various visualization techniques for dynamical systems are discussed. Three current research directions concerning the visualization of dynamical systems are treated in more detail. These are: texture based techniques, visualization of high-dimensional dynamical systems, and advanced streamsurface representations. ", month = feb, number = "TR-186-2-98-06", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "visualization, dynamical systems", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Groeller-1998-VAD/", } @techreport{Groeller-1998-VDS, title = "Visualization of Dynamical Systems", author = "Eduard Gr\"{o}ller and Helwig L\"{o}ffelmann and Rainer Wegenkittl", year = "1998", abstract = "The visualization of analytically defined dynamical systems is important for a thorough understanding of the underlying system behavior. An introduction to analytically defined dynamical systems is given. Various visualization techniques for dynamical systems are discussed. Several current research directions concerning the visualization of dynamical systems are treated in more detail. These are: texture based techniques, visualization of high-dimensional dynamical systems, advanced streamsurface representations, local analysis - Poincare' sections, visualizing econometric models.", month = feb, number = "TR-186-2-98-07", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "visualization, dynamical systems", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Groeller-1998-VDS/", } @techreport{Groeller-1998-TunVis, title = "TunVis: Visualizing specific geologic features for tunnel planning and construction", author = "Horst Otto Meinhart and Rainer Wegenkittl and Eduard Gr\"{o}ller", year = "1998", abstract = "This paper describes a method and a system for visualizing a virtual tunnel through an existing geologic formation and a method for the generation of a camera animation along the tunnel axis. The tunnel is built from geologic data coming from vertical sample drills from the mountain top along the selected tunnel axis. Its wire frame model is then edited by a geologist and image information of the rock appearance is textured onto the tunnel wall, resulting in a photorealistic representation of the expected geologic rock formations. Finally a camera animation and video options are defined to render a video sequence of the camera movement.", month = feb, number = "TR-186-2-98-08", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "visualization, geologic features, tunnel planning", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Groeller-1998-TunVis/", } @techreport{Kopp-1998-IDD, title = "Interleaved Dimension Decomposition", author = "Manfred Kopp and Werner Purgathofer", year = "1998", abstract = "Wavelets in 2D or higher dimensions are often generated by a decomposition scheme from 1D wavelets. There are two decomposition schemes called the standard and the nonstandard decomposition which are used in most applications of higher dimensional wavelets. This paper introduces a new decomposition method, the interleaved dimension decomposition and compares its advantages and disadvantages with the other decompositions. Based on the properties of the interleaved dimension decomposition, applications to computer graphics are sketched including multiresolution painting, morphing in 2D and 3D, and image compression.", month = jan, number = "TR-186-2-98-03", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "Wavelets, morphing, multiresolution painting, image compression", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Kopp-1998-IDD/", } @techreport{Koenig-1998-NC, title = "Real Time Simulation and Visualization of NC Milling Processes for Inhomogeneous Materials on Low-End Graphics Hardware", author = "Andreas K\"{o}nig and Eduard Gr\"{o}ller", year = "1998", abstract = "Simulation and visualization of NC milling processes has become an important step in computer aided manufacturing. The usage of stock materials with specific locally varying properties (like density, accuracy, color, ...) becomes more and more important with new technologies emerging in the material industry. Our new approach, using volumetric representation, has been adapted to this needs and copes with inhomogeneous material properties. Taking color as one possible material property, our approach enables the visualization of milled wood or compound materials. Furthermore, our approach has been developed with the usage of low-end graphics hardware in mind. The algorithms have been optimized to ensure interactive update rates even on standard personal computers without hardware graphics acceleration.", month = jan, number = "TR-186-2-98-04", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "visualization, NC milling", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Koenig-1998-NC/", } @techreport{Fuhrmann-1998-CVA, title = "Collaborative Visualization in Augmented Reality", author = "Anton Fuhrmann and Michael Gervautz and Helwig L\"{o}ffelmann and Dieter Schmalstieg", year = "1998", abstract = "STUDIERSTUBE is an augmented reality system that has several advantages over conventional desktop and other virtual reality environments, including true stereoscopy, 3D-interaction, individual viewpoints and customized views for multiple users, unhindered natural collaboration and low cost. We demonstrate the application of this concept for the interaction of multiple users and illustrate it with several visualizations of dynamical systems in DynSys3D, a visualization system running on top of AVS. We also show how the integration of AR into a commercial visualization system can be achieved. Several examples constructed in DynSys3D - developed for the visualization of complex dynamical systems in AVS - will complement the presentation.", month = jan, number = "TR-186-2-98-01", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "Visualization, Augmented Reality", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Fuhrmann-1998-CVA/", } @techreport{Szalavari-1998-CGAR, title = "Collaborative Gaming in Augmented Reality", author = "Zsolt Szalav\'{a}ri and Erik Eckstein and Michael Gervautz", year = "1998", abstract = "We introduce a local collaborative environment for gaming. In our setup multiple users can interact with the virtual game and the real surroundings at the same time. They are able to communicate with other players during the game. We describe an augmented reality setup for multiple users with see-trough head-mounted displays, allowing dedicated stereoscopic views and individualized interaction for each user. We use face-snapping for fast and precise direct object manipulation. With face snapping and the subdivision of the gaming space into spatial regions, the semantics of actions can be derived out of geometric actions of the user. Further, we introduce a layering concept allowing individual views onto the common data structure. The layer concept allows to make privacy management very easy by simply manipulating the common data structure. Moreover, assigning layers to spatial regions carefully, a special privacy management is often not necessary. Moving objects from one region into another will automatically change their visibility and privacy for each participant. We demonstrate our system with two example board-games: Virtual Roulette and Mah-Jongg, both relying heavily on social communication and the need of a private space. ", month = jan, number = "TR-186-2-98-10", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "augmented reality, interaction techniques, CSCW, virtual gaming", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szalavari-1998-CGAR/", } @techreport{Loeffelmann-1998-EVC, title = "Enhancing the Visualization of Characteristic Structures in Dynamical Systems", author = "Helwig L\"{o}ffelmann and Eduard Gr\"{o}ller", year = "1998", abstract = "We present a thread of streamlets as a new technique to visualize dynamical systems in three-space. A trade-off is made between solely visualizing a mathematical abstraction through lower-dimensional manifolds, i.e., characteristic structures such as fixed point, separatrices, etc., and directly encoding the flow through stream lines or stream surfaces. Bundlers of streamlets are selectively placed near characteristic trajectories. An over-population of phase space with occlusion problems as a consequence is omitted. On the other hand, information loss is minimized since characteristic structures of the flow are still illustrated in the visualization.", month = jan, number = "TR-186-2-98-05", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "visualization, dynamical systems", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Loeffelmann-1998-EVC/", } @xmascard{xmas-1998, title = "X-Mas 1998", author = "Alexander Wilkie", year = "1998", abstract = "Die Schneeflocken wurden mit ART (Advanced Rendering Toolkit), einem am Institut fur Computergraphik entwickelten Programmsystem zur Berechnung von realistischen Bildern, erzeugt. Als Vorlage dienten Photos von echten Schneeflocken. Die sichtbaren Farbeffekte entstehen durch physikalisch korrekte Simulation der Lichtbrechung. Dieses Bild ist auch in seiner vollen Aufl\"{o}sung von 1536x1024 im von Greg Larson et al. eingef\"{u}hrten TIFF LogLuv-Format zum Download bereit (es unterst\"{u}tzen leider erst sehr wenige Programme diese Erweiterung des TIFF-Formates). This image was rendered with the spectral ray tracer of ART, the Advanced Rendering Toolkit, a software package for rendering realistic images developed at the Institute of Computer Graphics. The snowflakes have been modelled based on photos of real snowflakes. The colour effects are due to the use of a physically correct simulation of light dispersion. You can also download this image in the high dynamic range TIFF LogLuv image format developed by Greg Larson et al. in full 1536x1024 resolution here (note that most programs are not yet able to view this extension to the TIFF format).", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/xmas-1998/", } @phdthesis{Hauser-thesis, title = "Visualization of Dynamic Systems", author = "Helwig Hauser", year = "1998", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", school = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Hauser-thesis/", } @misc{Kopp-1998-Int, title = "Interleaved Dimension Decomposition - A new Decomposition Method for Wavelets and its Application to Computer Graphics", author = "Werner Purgathofer and Manfred Kopp", year = "1998", note = "In proceedings of WSCG98, Plzen, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Kopp-1998-Int/", } @misc{Mroz-1998-Sel, title = "Selected Trends in Scientific Visualization", author = "Eduard Gr\"{o}ller and Lukas Mroz and Helwig L\"{o}ffelmann", year = "1998", note = "Invited Paper in Proceedings of Spring Conference on Computer Graphics 1998 (SCCG'98), Budmerice, Slovakia, April 23.-25., 1998, pp. 17-26.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Mroz-1998-Sel/", } @misc{Huber-1998-Int, title = "Intersecting general parametric surfaces using bounding volumes.In proc", author = "E. Huber", year = "1998", note = "of the 10th Canadian Conference on Computational Geometry - CCCG'98, Montreal, Canada, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Huber-1998-Int/", } @misc{Huber-1998-Sur, title = "Surface-to-surface intersection with complete and guaranteed results", author = "Wilhelm Barth and E. Huber", year = "1998", note = "In proc. of the International Symposium on Scientific Computing, Computer Arithmetic, and Validated Numerics, pp. 60-61, Budapest, Hungary, SCAN'98, September 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Huber-1998-Sur/", } @misc{Leiss-1998-Rad, title = "Radiosity with Textures, Specular Reflexion and Transmission", author = "T. Leiss and Werner Purgathofer and Peter Ferschin", year = "1998", note = "In proceedings of SCCG 98, Budmerice, April 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Leiss-1998-Rad/", } @misc{Milik-1998-Geo, title = "Geometry of Mixed-mode Oscillations in the 3-d Autocatalator", author = "A. Milik and Eduard Gr\"{o}ller and Helwig L\"{o}ffelmann and Peter Szmolyan", year = "1998", note = "International Journal of Bifurcation and Chaos (IJBC), World Scientific Publishing Company, Vol. 8(3), pp. 505-519, March 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Milik-1998-Geo/", } @misc{Pronk-1998-Con, title = "Constructing Formal Language Definitions, Can We Manage? What Can We Learn From Modula-2 Standardization? Computer Standards & Interfaces, Volume 19, Number 2, March 1998, Elsevier / North Holland, pp.143-154", author = "C. Pronk and Martin Sch\"{o}nhacker", year = "1998", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Pronk-1998-Con/", } @misc{Raidl-1998-AGe, title = "A Genetic Algorithm for Labeling Point Features", author = "G\"{u}nther Raidl", year = "1998", note = "Proc. of the Int. Conference on Imaging Science, Systems, and Technology, Las Vegas, NV, pp. 189-196, July 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Raidl-1998-AGe/", } @misc{Raidl-1998-AHy, title = "A Hybrid GP Approach for Numerically Robust Symbolic Regression", author = "G\"{u}nther Raidl", year = "1998", note = "Proc. of the 1998 Genetic Programming Conference, Madison, Wisconsin, pp. 323-328, July 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Raidl-1998-AHy/", } @misc{Raidl-1998-AnI, title = "An Improved Genetic Algorithm for the Multiconstrained 0-1 Knapsack Problem", author = "G\"{u}nther Raidl", year = "1998", note = "Proc. of the 5th IEEE Conference on Evolutionary Computation, 1998 IEEE World Congress on Computational Intelligence, Anchorage, Alaska, pp. 207-211, May 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Raidl-1998-AnI/", } @misc{Raidl-1998-App, title = "Approximation with Evolutionary Optimized Tensor Product Bernstein Polynomials", author = "G\"{u}nther Raidl and C. Wurm", year = "1998", note = "Proc. of the Int. Conference on Artificial Intelligence in Industry: From Theory to Practice, High Tatras, Slovakia, pp. 247-256, April 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Raidl-1998-App/", } @misc{Raidl-1998-Evo, title = "Evolutionary Optimized Tensor Product Bernstein Polynomials versus Backpropagation Networks", author = "G\"{u}nther Raidl and Gabriele Koller", year = "1998", note = "Proc. of the Int. ICSC/IFAC Symposium on Neural Computation, Vienna, Austria, pp. 885-890, September 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Raidl-1998-Evo/", } @misc{Raidl-1998-Gen, title = "Genetic Algorithms for the Multiple Container Packing Problem", author = "G\"{u}nther Raidl and Gabriele Koller", year = "1998", note = "Proc. of the 5th Int. Conference on Parallel Problem Solving from Nature, Amsterdam, The Netherlands, Springer LNCS 1498, pp. 875-884, September 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Raidl-1998-Gen/", } @misc{Tastl-1998-Tra, title = "Transforming an Analytically Defined Color Space to Match Psychophysically Gained Color Distances", author = "G\"{u}nther Raidl and Ingeborg Tastl", year = "1998", note = "Proc. of the SPIE's 10th Int. Symposium on Electronic Imaging: Science and Technology, San Jose, CA, January 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Tastl-1998-Tra/", } @misc{Wonka-1998-Ray, title = "Raytracing of nonlinear fractals", author = "Peter Wonka and Michael Gervautz", year = "1998", note = "WSCG Plzen 1998 Proceedings, pp. 424-431, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Wonka-1998-Ray/", } @phdthesis{Dimitrov-thesis, title = "Volume Visualization", author = "Leonid Dimitrov", year = "1998", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", school = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Dimitrov-thesis/", } @misc{Hesina-1998-ANe, title = "A Network Architecture for Remote Rendering", author = "Dieter Schmalstieg and Gerd Hesina", year = "1998", note = "Proceedings of Second International Workshop on Distributed Interactive Simulation and Real-Time Applications, pp. 88-91, Montreal, Canada, July 1998. IEEE Computer Society.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Hesina-1998-ANe/", } @misc{Koenig-1998-Rea, title = "Real Time Simulation and Visualization of NC Milling Processes for Inhomogeneous Materials on Low-End Graphics Hardware, In F.-E", author = "Eduard Gr\"{o}ller and Andreas K\"{o}nig", year = "1998", note = "Wolters, N. M. Patrikalakis (eds.), Proceedings of CGI'98 (Computer Graphics International), IEEE Computer Society, Hannover, Germany, June 22-26, 1998, pp. 338-349.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Koenig-1998-Rea/", } @misc{Tobler-1998-ANe, title = "A New Formfactor Analogy", author = "L\'{a}szl\'{o} Neumann and Werner Purgathofer and Mateu Sbert and Robert F. Tobler", year = "1998", note = "In Rendering Techniques´98 (ed. G.Drettakis, N.Max), Springer-Verlag, Wien, July 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Tobler-1998-ANe/", } @misc{Tobler-1998-Des, title = "Designing a Parallel Object Oriented Graphics Framework", author = "Robert F. Tobler", year = "1998", note = "In the Proceedings of the 2nd Eurographics Workshop on Parallel Rendering and Visualisation, Rennes, September 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Tobler-1998-Des/", } @misc{Tobler-1998-Lin, title = "Linearly Combining Shading Models for Texturing in Global Illumination Algorithms", author = "S. Hynst and Werner Purgathofer and Robert F. Tobler", year = "1998", note = "In Proceedings of the WinterSchool of Computer Graphics, Plzen, Czech Republic, February 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Tobler-1998-Lin/", } @misc{Wilkie-1998-Pho, title = "Photon Radiosity Lightmaps for CSG Solids", author = "Werner Purgathofer and Alexander Wilkie and Robert F. Tobler", year = "1998", note = "In Proceedings of the CSG98 conference "CSG98 - Set theoretic Solid Modelling Techniques and Applications", Ammerdown, UK, April 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Wilkie-1998-Pho/", } @misc{Fischel-1998-Cas, title = "Case study: Visualizing Various Properties of Dynamical Systems", author = "Eduard Gr\"{o}ller and Lukas Mroz and Helmut Doleisch and Helwig L\"{o}ffelmann and Georg Fischel", year = "1998", note = "In 6th International Workshop on Digital Image Processing and Computer Graphics (DIP-97): Applications in Humanities and Natural Sciences, Emanuel Wenger, Leonid I. Dimitrov, Editors, Proceedings of SPIE vol 3346, pp. 146-154, (1998).", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Fischel-1998-Cas/", } @misc{Glaeser-1998-AFa, title = "A Fast Shadow Profiler and its Applications", author = "Eduard Gr\"{o}ller and Georg Glaeser", year = "1998", note = "In 6th International Workshop on Digital Image Processing and Computer Graphics (DIP-97): Applications in Humanities and Natural Sciences, Emanuel Wenger, Leonid I. Dimitrov, Editors, Proceedings of SPIE vol 3346, pp. 168-176, (1998).", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Glaeser-1998-AFa/", } @misc{Glaeser-1998-Eff, title = "Efficient Volume-Generation During the Simulation of NC-Milling", author = "Eduard Gr\"{o}ller and Georg Glaeser", year = "1998", note = "Proceedings of the International Workshop on Visualization and Mathematics'97, Berlin-Dahlem, Germany, September, 16.-19., 1997. In H.-Ch. Hege, K. Polthier (eds), Mathematical Visualization, Springer Heidelberg, 1998, pp. 89-106.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Glaeser-1998-Eff/", } @misc{Mantler-1998-Dyn, title = "Dynamic Load Balancing in Distributed Virtual Environments", author = "Dieter Schmalstieg and Stephan Mantler", year = "1998", note = "Proceedings of EUROGRAPHICS'98, conference companion, Lisbon, Portugal, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Mantler-1998-Dyn/", } @misc{Neumann-1998-Aut, title = "Automatic Exposure in Computer Graphics based on the Minimum Information Loss Principle", author = "L\'{a}szl\'{o} Neumann and Werner Purgathofer and Kresimir Matkovic", year = "1998", note = "In proceedings of CGI98, Hannover, Germany, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Neumann-1998-Aut/", } @misc{Neumann-1998-Inc, title = "Incident Light Metering in Computer Graphics", author = "L\'{a}szl\'{o} Neumann and Werner Purgathofer and Attila Neumann and Kresimir Matkovic", year = "1998", note = "In Computer Graphics Forum 17(4), pp. 235-247, Blackwell, Oxford, December 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Neumann-1998-Inc/", } @misc{Neumann-1998-Per, title = "Perception Based Color Image Difference", author = "L\'{a}szl\'{o} Neumann and Werner Purgathofer and Kresimir Matkovic", year = "1998", note = "In Computer Graphics Forum 17(3), pp.C/233-C/241, Blackwell, Oxford, Sept. 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Neumann-1998-Per/", } @misc{Neumann-1998-The, title = "The Constant Radiance Term", author = "L\'{a}szl\'{o} Neumann and Werner Purgathofer and Jan Prikryl and Attila Neumann", year = "1998", note = "In Machine, Graphics and Vision, No. 7(3), pp.535-549, Polish Academy of Sciences, Warsaw, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Neumann-1998-The/", } @misc{Szirmay-1998-Imp, title = "Importance Driven Quasi-Random Walk Solution of the Rendering Equation", author = "Werner Purgathofer and L\'{a}szl\'{o} Szirmay-Kalos and Bal\'{a}zs Cs\'{e}bfalvi", year = "1998", note = "In proceedings of WSCG98, Plzen, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szirmay-1998-Imp/", } @misc{Szirmay-1998-Qua, title = "Quasi-Monte Carlo Global Light Tracing with Infinite Number of Rays", author = "T. F\'{o}ris and Werner Purgathofer and L\'{a}szl\'{o} Szirmay-Kalos", year = "1998", note = "In proceedings of WSCG98, Plzen, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szirmay-1998-Qua/", } @misc{Szirmay-1998-Ray, title = "Ray-bundle Tracing with Metropolis Sampling and Hardware Acceleration", author = "Werner Purgathofer and L\'{a}szl\'{o} Szirmay-Kalos", year = "1998", note = "In Rendering Techniques´98 (ed. G.Drettakis, N.Max), Springer-Verlag, Wien, July 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szirmay-1998-Ray/", } @misc{Tobler-1998-Anew, title = "A new Form Factor Analogy and its Application to Stochastic Global Illumination Algorithms", author = "L\'{a}szl\'{o} Neumann and Werner Purgathofer and Mateu Sbert and Robert F. Tobler", year = "1998", note = "In Rendering Techniques 98, Springer-Verlag, Wien, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Tobler-1998-Anew/", } @misc{Fuhrmann-1998-Col, title = "Collaborative Visualization in Augmented Reality", author = "Dieter Schmalstieg and Anton Fuhrmann and Michael Gervautz and Helwig L\"{o}ffelmann", year = "1998", note = "IEEE Computer Graphics & Applications, Vol. 18, No. 4, pp. 54-59, IEEE Computer Society, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Fuhrmann-1998-Col/", } @misc{Fuhrmann-1998-Rea, title = "Real-Time Techniques for 3D Flow Visualization", author = "Eduard Gr\"{o}ller and Anton Fuhrmann", year = "1998", note = "IEEE Visualization'98 Proceedings, 1998, pp. 305-312.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Fuhrmann-1998-Rea/", } @misc{Fuhrmann-1998-Str, title = "Strolling through Cyberspace with Your Hands in Your Pockets: Head Directed Navigation in Virtual Environments", author = "Dieter Schmalstieg and Anton Fuhrmann and Michael Gervautz", year = "1998", note = "Virtual Environments '98 (Proceedings of the 4th EUROGRAPHICS Workshop on Virtual Environments), pp. 216-227, Stuttgart, Germany, June 16-18, Springer-Verlag, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Fuhrmann-1998-Str/", } @misc{Meinhart-1998-Tun, title = "TunVis: Visualizing specific geologic features for tunnel planning and construction, Proceedings of Spring Conference on Computer Graphics 1998 (SCCG", author = "Meinhart H. O. Wegenkittl and Eduard Gr\"{o}ller", year = "1998", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Meinhart-1998-Tun/", } @article{Neumann-1998-Perc, title = "Perception Based Color Image Difference", author = "L\'{a}szl\'{o} Neumann and Kresimir Matkovic and Werner Purgathofer", year = "1998", journal = "Computer Graphics Forum", note = "Eurographics98, Lissabon, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Neumann-1998-Perc/", } @misc{Csebfalvi-1998-AnI, title = "An Incremental Algorithm for Fast Rotation of Volumetric Data", author = "Bal\'{a}zs Cs\'{e}bfalvi", year = "1998", note = "Spring Conference on Computer Graphics, Budmerice, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Csebfalvi-1998-AnI/", } @misc{Szalavari-1998-Aug, title = "Augmented Reality Enabled Collaborative Work in "Studierstube"", author = "Dieter Schmalstieg and Anton Fuhrmann and Zsolt Szalav\'{a}ri and Michael Gervautz", year = "1998", note = "Abstract, EURO-VR'97 conference, Amsterdam, The Netherlands, Nov. 10-11, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szalavari-1998-Aug/", } @misc{Szalavari-1998-Col, title = "Collaborative Gaming in Augmented Reality, Proceedings of VRST'98, pp.195-204, November 2-5, 1998", author = "Zsolt Szalav\'{a}ri and Michael Gervautz and Erik Eckstein", year = "1998", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szalavari-1998-Col/", } @misc{Szalavari-1998-Int, title = "Interaktion mit virtuellen Informationen in realen Umgebungen - das "Personal Interaction Panel"", author = "Zsolt Szalav\'{a}ri and Michael Gervautz", year = "1998", note = "Arbeiten und begreifen: Neue Mensch-Maschine - Schnittstellen, lit-Verlag, pp. 147-158, Germany, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szalavari-1998-Int/", } @misc{Szalavari-1998-Stu, title = "Studierstube - An Environment for Collaboration in Augmented Reality", author = "Dieter Schmalstieg and Anton Fuhrmann and Zsolt Szalav\'{a}ri and Michael Gervautz", year = "1998", note = "Virtual Reality: Research, Development & Applications, (3): pp. 37-48, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Szalavari-1998-Stu/", } @misc{Faisstnauer-1998-Com, title = "Computer Assisted Selection of 3D Interaction and Navigation Metaphors", author = "Dieter Schmalstieg and Christian Faisstnauer and Zsolt Szalav\'{a}ri", year = "1998", note = "Proceedings of Workshop on Computer Graphics, pp. ?-?, Taiwan, November 4-5, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Faisstnauer-1998-Com/", } @misc{Faisstnauer-1998-Dev, title = "Device-Independent Navigation and Interaction in Virtual Environments", author = "Dieter Schmalstieg and Christian Faisstnauer and Zsolt Szalav\'{a}ri", year = "1998", note = "Proceedings of the 1998 VRST Adjunct Workshop on Computer Graphics, Taipei, Taiwan, Nov. 5-6, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Faisstnauer-1998-Dev/", } @misc{Loeffelmann-1998-Enh, title = "Enhancing the Visualization of Characteristic Structures in Dynamical Systems", author = "Eduard Gr\"{o}ller and Helwig L\"{o}ffelmann", year = "1998", note = "Proceedings of 9th EUROGRAPHICS Workshop on Visualization in Scientific Computing, Blaubeuren, Germany, April 20.-22., 1998, pp. 35-46. Republished in D. Bartz (ed.), Visualization in Scientific Computing'98, Springer, pp.59-68.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Loeffelmann-1998-Enh/", } @misc{Loeffelmann-1998-Vis, title = "Visualizing Poincar\'{e} Maps together with the Underlying Flow", author = "Thomas Kucera and Eduard Gr\"{o}ller and Helwig L\"{o}ffelmann", year = "1998", note = "Proceedings of the International Workshop on Visualization and Mathematics'97, Berlin-Dahlem, Germany, September, 16.-19., 1997. In H.-Ch. Hege, K. Polthier (eds), Mathematical Visualization, Springer Heidelberg, 1998, pp. 315-328.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Loeffelmann-1998-Vis/", } @misc{Purgathofer-1998-Sel, title = "Selected New Trends inScientific Visualization", author = "Werner Purgathofer and Helwig L\"{o}ffelmann", year = "1998", note = "Published in the Proceedings of the Sixth International Workshop on Digital Image Processing and Computer Graphics (SPIE DIP-97), Oct., 1997, in Vienna, Austria, pp. 130-145 (1998).", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Purgathofer-1998-Sel/", } @misc{Schmalstieg-1998-ATr, title = "A Transparent Personal Interaction Panel for the Virtual Table", author = "Dieter Schmalstieg and L. Miguel Encarna\c{c}\~{a}o", year = "1998", note = "Computergraphik Topics, pp. 19-20, Vol. 10., No. 5, Fraunhofer Gesellschaft, Darmstadt, Germany, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Schmalstieg-1998-ATr/", } @misc{Schmalstieg-1998-Stu, title = "Studierstube - An Environment for Collaboration in Augmented Reality", author = "Dieter Schmalstieg and Anton Fuhrmann and Zsolt Szalav\'{a}ri and Michael Gervautz", year = "1998", note = "Virtual Reality - Systems, Development and Applications, Vol. 3, No. 1, pp. 37-49, 1998.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Schmalstieg-1998-Stu/", } @misc{Loeffelmann-1998-Visu, title = "Visualizing Dynamical Systems near Critical Points, Proceedings of Spring Conference on Computer Graphics 1998 (SCCG'98), Budmerice, Slovakia, April 23.-25., 1998, pp", author = "Eduard Gr\"{o}ller and Helmut Doleisch and Helwig L\"{o}ffelmann", year = "1998", note = "175-184.", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Loeffelmann-1998-Visu/", } @misc{Schoenhacker-1998-Pre, title = "Presenting Dynamic Tactile Bitmap Graphics Using a Standard Braille Character Glyph Display", author = "Martin Sch\"{o}nhacker", year = "1998", note = "in: A.D.N. Edwards, A. Arato, W. Zagler (eds.), Computers and Assistive Technology - ICCHP'98, Proceedings of the XV. IFIP World Computer Congress, 31 August - 4 September 1998, Vienna/Austria and Budapest/Hungary, OCG Schriftenreihe Band 118, pp.141-147.

Paluszny, M., Buehler, K.: Canal surfaces and inversive geometry. (English) Daehlen, Morten (ed.) et al., Mathematical methods for curves and surfaces II. Nashville, TN: Vanderbilt Univ. Press. 367-374 (1998). MSC 1991: *65D17", URL = "https://www.cg.tuwien.ac.at/research/publications/1998/Schoenhacker-1998-Pre/", }