Structure of Sustainable Economic Value in Social Entrepreneurial Enterprises (2005)
Thomas Strothotte, Rolf Wüstenhagen
Through this paper we wish to make a contribution toward an understanding of the sustainability of social entrepreneurial enterprises (SEEs) and their financing. We begin with an analysis of the...
Structure of Sustainable Economic Value in Social Entrepreneurial Enterprises (2005)
Thomas Strothotte, Rolf Wüstenhagen
Through this paper we wish to make a contribution toward an understanding of the sustainability of social entrepreneurial enterprises (SEEs) and their financing. We begin with an analysis of the...
Wallace Chigona, Henry Sonnet, Felix Ritter, Thomas Strothotte
Providing textual annotations for 3D visualizations poses a number of interesting challenges: It is difficult to find a suitable position for the text such that the image-text co-referential...
Psychology and Non-Photorealistic Rendering: (2003)
Mara Mellin, Christoph S. Herrmann, Volker Linneweber, Thomas Strothotte
This paper proposes the necessity of developing a theory of psychology within non-photorealistic rendering (NPR). Despite the inherent flexibility of NPR within a variety of visual media, the...
Improving Readability of Contextualized Text Explanations (2003)
Wallace Chigona, Thomas Strothotte
DUAL-USE OF IMAGE SPACE (DUIS) is an interactive technique for presenting text corresponding to images within the image space. From a technical point of view, the pixels in the image space are used...
Dual-Use of Image Space: The Challenges of (2002)
Wallace Chigona, Stefan Schlechtweg, Thomas Strothotte
In this paper we discuss a technique for presenting textual information within visualizations and for enabling users to interact with the text. Our method relies on shading images using text-based...
Creating Non-Photorealistic Images the Designer's Way (2002)
Nick Halper, Stefan Schlechtweg, Thomas Strothotte
We present a novel way for quickly and easily designing nonphotorealistic images based on elementary operations which are linked together to create a variety of visual effects. Rather than mimicking...
Frame-Coherent Stippling (2002)
Stippling is an artistic rendering technique where shading and texture is given by placing points or stipples on the canvas until the desired darkness is achieved. Computer-generated stippling has...
Dynamic Visual Emphasis in Interactive (2002)
Ralf Helbing, Knut Hartmann, Thomas Strothotte
Emphasis is an important vehicle to communicate relevance and to guide user focus, especially in interactive computer graphics. In dynamic 3D systems in particular, emphasis techniques must also...
ViDio - Virtual Digital Annotations (2002)
Marcel Gtze, Stefan Schlechtweg, Thomas Strothotte
Today we are far away from a papefiess office. Many readers still prefer paper instead of electronic documents and thus they print out their documents for reading. Moreover, solutions for reading,...
An Illustration Technique Using (2002)
Oliver Deussen, Jorg Hamel, Andreas Raab, Stefan Schlechtweg, Thomas Strothotte
We present a method for generating line drawings of complex geometries in the style of crosshatched illustrations. Hatching lines are generated by intersecting the geometry with a set of planes....
Quick Camera Path Planning for Interactive 3D Environments (2002)
Ralf Helbing, Thomas Strothotte
We present a simple and efficient planning algorithm for camera motions through a 3D envi- ronment.
Dynamic Visual Emphasis in Interactive Technical Documentation (2002)
Ralf Helbing, Knut Hartmann, Thomas Strothotte
Emphasis is an important vehicle to communicate relevance and to guide user focus, especially in interactive computer graphics. In dynamic 3D systems in particular, emphasis techniques must also...
Computer Supported Staging of Photorealistic Animations (2002)
Thomas Gatzky, Thomas Strothotte
We develop methods to support users in the process of creation, arrangement and calibration of lights, cameras and sceneatmospheres to produce photorealistic animations. Using techniques and rules in...
Approximated View Reconstruction Using Precomputed ID-Bitfields (2002)
Oscar Meruvia Pastor, Thomas Strothotte
A technique is presented to construct arbitrary views of a model by using previously computed views. The technique is simple to implement, completely general for polygonal models and can be used...
Real-Time Halftoning: A Primitive For Non-Photorealistic Shading (2002)
P. Debevec, S. Gibson (editors, Bert Freudenberg, Maic Masuch, Thomas Strothotte
We introduce halftoning as a general primitive for real-time non-photorealistic shading. It is capable of producing a variety of rendering styles, ranging from engraving with lighting-dependent line...
Hardware-Based Voxelization for 3D Spatial Analysis (2002)
Steffi Beckhaus, Juergen Wind, Fraunhofer Imk. Ve, Thomas Strothotte
This paper presents and evaluates a fast graphics hardwarebased voxelization method to spatial analysis, which generates object-coded volume data utilizing the Performer scene-graph. Two color-coding...
Synthetic Holograms of Splines (2002)
Alf Ritter, Thomas Benziger, Oliver Deussen, Thomas Strothotte, Hubert Wagener
In this paper we present an approach for the holographic imaging of objects composed of splines. It is based on an imaging method for lines and extended to fit the requirements for the visualization...
Holographic Imaging of Lines: a Texture Based Approach (2002)
Alf Ritter, Oliver Deussen, Hubert Wagener, Thomas Strothotte
Holography is a method for three-dimensional imaging of objects. In this paper we present an approach for the generation of holograms, exploiting standard graphics rendering methods and hardware. We...
Stylizing Silhouettes at Interactive Rates: From Silhouette Edges to Silhouette Strokes (2002)
Tobias Isenberg, Nick Halper, Thomas Strothotte
A way to create effective stylized line drawings is to draw strokes that start and stop at visible portions along the silhouette of an object to be portrayed. In computer graphics to date, algorithms...
Real-Time Halftoning: A Primitive For Non-Photorealistic Shading (2002)
Paul Debevec, Simon Gibson (editors, Bert Freudenberg, Maic Masuch, Thomas Strothotte
We introduce halftoning as a general primitive for real-time non-photorealistic shading. It is capable of producing a variety of rendering styles, ranging from engraving with lighting-dependent line...
Contextualized Preview of Image Map Links (2002)
Wallace Chigona, Thomas Strothotte
Previewing links in hypertext navigation helps reduce the cognitive overhead associated with deciding whether or not to follow a link. In this paper we introduce a new concept called Dual-Use of...
Distortion for Readability of Contextualized Text Explanations for Visualizations (2002)
Wallace Chigona, Thomas Strothotte
Dual-Use of Image Space (DUIS) is a new technique for presenting text explanations for images within image space. This, however, presents the problem of readability of the text since readers are used...
Contextualized Text Explanations for Visualizations (2002)
Wallace Chigona, Thomas Strothotte
According to the multimedia design principle of spatial contiguity, presenting text explanations for visualizations within the image space improves the users' ability to make referential links...
The Intelligent Pen-Toward a Uniform Treatment of Electronic Documents (2002)
Marcel Gotze, Stefan Schlechtweg, Thomas Strothotte
This paper introduces the intelligent pen metaphor, an approach to uniformly treat interaction with electronic documents, especially for marking and annotating a document. This enables an easier...
An Approach to Help Functionally Illiterate People with Graphical Reading Aids (2002)
Marcel Goetze, Thomas Strothotte
About half the world's population is illiterate, and since the command of a (natural) language is necessary for web access, these potential users are being left out of the information society. Such...
Creating Non-Photorealistic Images the Designer's Way (2002)
Nick Halper, Stefan Schlechtweg, Thomas Strothotte
We present a novel way for quickly and easily designing nonphotorealistic images based on elementary operations which are linked together to create a variety of visual effects. Rather than mimicking...
Fast Collision Detection for Haptic Displays Using Polygonal Models (2002)
Henry K Onig, Thomas Strothotte
Haptic displays provide force feedback for a wide range of applications. During the haptic representation of virtual objects, one of the central tasks is to find out whether the user is inside the...
Orientation and Navigation in Virtual Haptic-Only Environments (2002)
Henry Knig, Jochen Schneider, Thomas Strothotte
In this paper we present methods which allow users to orient themselves and navigate through haptic-only environments. The fundamental idea is to use non-realistic haptic rendering to organize and...
An Approach to Visualizing Transparency in Computer-Generated (2002)
Jorg Hamel, Stefan Schlechtweg, Thomas Strothotte
This paper builds on principles of depicting transparency in hand-made line drawings, and develops a method to generate similar, but computer-generated, line drawings in a two-step process. In the...
Haptic Exploration Of Virtual Buildings Using Non-Realistic Haptic Rendering (2002)
Henry Knig, Jochen Schneider, Thomas Strothotte
This paper argues that the goal of reducing the differences between features within a 3D model and the use of 3D haptic space of the force feedback device is not necessarily desirable. We present the...
Dual-Use of Image Space: The Challenges of Explaining Visualizations from Within (2002)
Wallace Chigona, Stefan Schlechtweg, Thomas Strothotte
In this paper we discuss a technique for presenting textual information within visualizations and for enabling users to interact with the text. Our method relies on shading images using text-based...
Jochen Schneider, Thomas Strothotte
this paper, the development of the prototype and initial experience with it are presented
MoBIC: user needs and preliminary design for a mobility aid for blind and elderly travellers (2002)
Thomas Strothotte, Helen Petrie, Valerie Johnson
This paper presents the initial research for the development of a new travel aid to increase the independent mobility of blind and elderly travellers. The MoBIC travel aid consists of two...
Computer-Visualistik-Raum: Veritable and Inexpensive Presentation of a Virtual Reconstruction (2001)
Bert Freudenberg, Maic Masuch, Niklas Rober, Thomas Strothotte
This paper describes the development of the Computer-VisualistikRaum (CVR), a Virtual Reality experience presented in the Exhibition "Otto the Great, Magdeburg and Europe" which took place in 2001 in...
Walk-Through Illustrations: Frame-Coherent Pen-and-Ink Style in a Game Engine (2001)
Eurographics A. Chalmers, Bert Freudenberg, Maic Masuch, Thomas Strothotte
In this paper we show how a game engine designed to generate photorealistic images can be extended to produce non-photorealistic and hybrid renditions. We introduce new hardware-based methods to...
Motion Enhanced Visualization in Support of Information Fusion (2001)
Roland Jesse, Thomas Strothotte
The process known as information fusion faces the extraction and combination of information from multiple, heterogeneous sources to derive information of a new quality or abstraction level. Though...
Guided Exploration with Dynamic Potential Fields: The CubicalPath System (2001)
Steffi Beckhaus, Felix Ritter, Thomas Strothotte
Exploring unknown models or scenes is a highly interactive and dynamic process. Systems for automatic presentation of models or scenes either require cinematographic rules, direct human interaction,...
Nicolas Halper, Ralf Helbing, Thomas Strothotte
Many computer games treat the user in the "1st person" and bind the camera to his or her view. More sophistication in a game can be achieved by enabling the camera to leave the users' viewpoint....
3D Illustrative Effects for Animating Line Drawings (2001)
Tobias Isenberg, Maic Masuch, Thomas Strothotte
Most illustrative techniques used in non-photorealistic rendering to date apply a rendering style to objects or a scene and alter the appearance of this style by employing illumination or depth...
Surfaces To Lines: Rendering Rich Line Drawings (2001)
Stefan Schlechtweg, Bert Schonwalder, Lars Schumann, Thomas Strothotte
Rendering algorithms have tended to restrict themselves to represent the effect of light sources on scenes as could be observed by the human eye. For certain applications, like teaching surgery and...
Visualizing Knowledge about Virtual Reconstructions of Ancient Architecture (2001)
Thomas Strothotte, Maic Masuch, Tobias Isenberg
One of the assumptions of current software for visualizing architecture is that the underlying geometry is a correct, objective, and complete representation of the objects in question. However, we...
Hardware-Based Rendering of Full-Parallax Synthetic Holograms (2000)
Alf Ritter, Joachim Bottger, Oliver Deussen, Matthias Konig, Thomas Strothotte, Facultyofcomputer Science
We present a method for efficiently calculating the interference of complex-valued two-dimensional wave patterns which is usefull during the generation of synthetic holograms. These patterns are...
Computer-Generated Pen-and-Ink Illustration of Trees (2000)
Oliver Deussen, Thomas Strothotte
We present a method for automatically rendering pen-and-ink illustrations of trees. A given 3-d tree model is illustrated by the tree skeleton and a visual representation of the foliage using...
CubicalPath - Dynamic Potential Fields for Guided Exploration in Virtual Environments (2000)
Steffi Beckhaus, Felix Ritter, Thomas Strothotte
Exploring unknown models or scenes is a highly interactive and dynamic process. Systems for automatic presentation of models or scenes either require cinematographic rules, direct human interaction,...
Steffi Beckhaus, Felix Ritter, Thomas Strothotte
Exploring unknown models or scenes is a highly interactive and dynamic process. Systems for automatic presentation of models or scenes either require cinematographic rules, direct human interaction,...
Generating Scientific Illustrations in Digital Books (2000)
Stefan Schlechtweg, Thomas Strothotte
In this paper we introduce what we call the "text illustration problem": Given a (scientific or technical) text which a user is studying and interacting with, as well as a collection of geometric...
Floating Points: A Method for Computing Stipple Drawings (2000)
Oliver Deussen, Stefan Hiller, Cornelius Van Overveld, Thomas Strothotte
We present a method for computer generated pen-and-ink illustrations by the simulation of stippling. In a stipple drawing, dots are used to represent tone and also material of surfaces. We create...
Stefan Schlechtweg, Thomas Strothotte
In this paper we introduce what we call the ext illustration problem": Given a (scienti c or technical) text which a user is studying and interacting with, as well as a collection of geometric models...
Describing Abstraction in Rendered Images through Figure Captions (1999)
Vol Nr, Knut Hartmann, Bernhard Preim, Thomas Strothotte
ion in Rendered Images through Figure Captions Knut Hartmann Department of Knowledge and Language Engineering, Faculty of Computer Science, Otto-von-Guericke University of Magdeburg,...
Describing Abstraction in Rendered Images through Figure Captions (1999)
Vol Nr, Knut Hartmann, Bernhard Preim, Thomas Strothotte
We analyze illustration and abstraction techniques used in rendered images. We argue that it is important to convey these techniques to viewers of such images to enhance the process of image...
An Approach to Visualizing Transparency in Computer-Generated Line Drawings (1999)
Jorg Hamel, Stefan Schlechtweg, Thomas Strothotte
This paper builds on principles of depicting transparency in hand-made line drawings, and develops a method to generate similar, but computer-generated, line drawings in a two-step process. In the...
An Illustration Technique Using Hardware-Based Intersections and Skeletons (1999)
Oliver Deussen, Jorg Hamel, Andreas Raab, Stefan Schlechtweg, Thomas Strothotte
We present a method for generating line drawings of complex geometries in the style of crosshatched illustrations. Hatching lines are generated by intersecting the geometry with a set of planes....
Figure Captions in Visual Interfaces (1999)
Bernhard Preim, Rainer Michel, Knut Hartmann, Thomas Strothotte
We present a general concept for the enhancement of visual interfaces with automatic figure captions describing a visualization. The incorporation of figure captions in interactive systems raises...
Figure Captions in Visual Interfaces (1998)
Bernhard Preim, Rainer Michel, Knut Hartmann, Thomas Strothotte
We present a general concept for the enhancement of visual interfaces with automatic figure captions describing a visualization. The incorporation of figure captions in interactive systems raises...
Creating On-Line Graphical Illustrations for Medical Texts (1998)
Stefan Schlechtweg, Andreas Raab, Thomas Strothotte
: We present a new approach for connecting textual and graphical information within interactive systems for medical illustration. In contrast to earlier approaches where text is used to label a...
Rendering Line-Drawings with Limited Resources (1998)
Stefan Schlechtweg, Thomas Strothotte
Pictures play an important role in the communication process. Communicative goals can be expressed for instance with the specific use of different levels of abstraction in pictures. Especially in...
Visualising Ancient Architecture using Animated Line Drawings (1998)
Maic Masuch, Thomas Strothotte
We present a visualisation of an medieval palace as an application for a new rendering and animation tool which is capable of rendering images in the style of line drawings. In contrast to other...
Describing Abstraction in Rendered Images through Figure Captions (1998)
Bernhard Preim, Thomas Strothotte
ion in Rendered Images through Figure Captions Knut Hartmann, 1 Bernhard Preim, 2 Thomas Strothotte 2 1 Institute for Knowledge and Language Engineering 2 Department of Simulation and Graphics...
Figure Captions in Visual Interfaces (1998)
Bernhard Preim, Rainer Michel, Knut Hartmann, Thomas Strothotte
We present a general concept for the enhancement of visual interfaces with automatic figure captions describing a visualization. The incorporation of figure captions in interactive systems raises...
Holographic Imaging of Lines: a Texture Based Approach (1997)
Alf Ritter, Oliver Deussen, Hubert Wagener, Thomas Strothotte
Holography is a method for three-dimensional imaging of objects. In this paper we present an approach for the generation of holograms, exploiting standard graphics rendering methods and hardware. We...
Interaktive und wissensbasierte Methoden zur integrierten Bild- und Sprachkommunikation. (1989)
Stuttgart, Univ., Habil.-Schr., 1989.
Temporal constructs for an algorithmic language [microform] / (1986)
Includes abstract in French and English.
Fast raster graphics using parallel processing--[microform] /--by Thomas Strothotte. (1982)
Thesis (M. Sc.)--Simon Fraser University, 1981.