IPT/EGVE 2007: 11th International Workshop on Immersive Projection Technology, 13th Eurographics Workshop on Virtual Enviroments

Permanent URI for this collection

https://diglib.eg.org/handle/10.2312/370

Spinnstube: A Seated Augmented Reality Display System

[meta data] [files:
017-023.pdf
]
Wind, Jürgen
; 
Riege, Kai
; 
Bogen, Manfred

PDRIVE: The Projector-based, Desktop, Reach-In Virtual Environment

[meta data] [files:
009-016.pdf
]
Haan, Gerwin de
; 
Griffith, Eric J.
; 
Koutek, Michal
; 
Post, Frits H.

High Ecological Validity and Accurate Stimulus Control in VR-based Psychological Experiments

[meta data] [files:
025-032.pdf
]
Wolter, Marc
; 
Armbruester, Claudia
; 
Valvoda, Jakob T.
; 
Kuhlen, Torsten

A Comparison of Tracking- and Controller-Based Input for Complex Bimanual Interaction in Virtual Environments

[meta data] [files:
043-052.pdf
]
Kunert, Andre
; 
Kulik, Alexander
; 
Huckauf, Anke
; 
Froehlich, Bernd

Widget Manipulation Revisited: a Case Study in Modeling Interactions Between Experimental Conditions

[meta data] [files:
053-060.pdf
]
Martens, Jean-Bernard
; 
Kok, Arjan
; 
Liere, Robert van

Visual Consistency in Rotational Manipulation Tasks in Sheared-Perceived Virtual Environments

[meta data] [files:
033-042.pdf ,
video_paper1047.mpg
]
Koutek, Michal
; 
Molenaar, Rene
; 
Haan, Gerwin de
; 
Post, Frits H.

Optical Magic Lenses and Polarization-Based Interaction Techniques

[meta data] [files:
061-068.pdf ,
lens_camera_ready_divx.avi
]
Waldner, Manuela
; 
Kalkusch, Michael
; 
Schmalstieg, Dieter

Three Extensions to Subtractive Crosstalk Reduction

[meta data] [files:
085-092.pdf
]
Smit, Ferdi A.
; 
Liere, Robert van
; 
Froehlich, Bernd

Interactive Exploration of Large Data in Hybrid Visualization Environments

[meta data] [files:
069-076.pdf ,
HybridVisEnv.wmv ,
HybridVisEnv.zip
]
Schirski, Marc
; 
Bischof, Christian
; 
Kuhlen, Torsten

Supervision of Task-Oriented Multimodal Rendering for VR Applications

[meta data] [files:
093-100.pdf
]
Bouyer, Guillaume
; 
Bourdot, Patrick
; 
Ammi, Mehdi

A GPU-Based Framework of Photometric Uniformity for Multi-Projector Tiled Display

[meta data] [files:
077-083.pdf
]
Yuan, Guodong
; 
Qin, Kaihuai

Adaptive Classifier System-Based Dead Reckoning

[meta data] [files:
101-108.pdf
]
Torki, Samir
; 
Torguet, Patrice
; 
Sanza, Cedric

Using Time-of-Flight Range Data for Occlusion Handling in Augmented Reality

[meta data] [files:
109-116.pdf
]
Fischer, Jan
; 
Huhle, Benjamin
; 
Schilling, Andreas

BibTeX (IPT/EGVE 2007: 11th International Workshop on Immersive Projection Technology, 13th Eurographics Workshop on Virtual Enviroments)
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/017-023,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
Spinnstube: A Seated Augmented Reality Display System}},

author = {
Wind, Jürgen
 and 
Riege, Kai
 and 
Bogen, Manfred
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/017-023}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/009-016,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
PDRIVE: The Projector-based, Desktop, Reach-In Virtual Environment}},

author = {
Haan, Gerwin de
 and 
Griffith, Eric J.
 and 
Koutek, Michal
 and 
Post, Frits H.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/009-016}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/025-032,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
High Ecological Validity and Accurate Stimulus Control in VR-based Psychological Experiments}},

author = {
Wolter, Marc
 and 
Armbruester, Claudia
 and 
Valvoda, Jakob T.
 and 
Kuhlen, Torsten
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/025-032}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/043-052,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
A Comparison of Tracking- and Controller-Based Input for Complex Bimanual Interaction in Virtual Environments}},

author = {
Kunert, Andre
 and 
Kulik, Alexander
 and 
Huckauf, Anke
 and 
Froehlich, Bernd
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/043-052}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/053-060,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
Widget Manipulation Revisited: a Case Study in Modeling Interactions Between Experimental Conditions}},

author = {
Martens, Jean-Bernard
 and 
Kok, Arjan
 and 
Liere, Robert van
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/053-060}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/033-042,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
Visual Consistency in Rotational Manipulation Tasks in Sheared-Perceived Virtual Environments}},

author = {
Koutek, Michal
 and 
Molenaar, Rene
 and 
Haan, Gerwin de
 and 
Post, Frits H.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/033-042}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/061-068,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
Optical Magic Lenses and Polarization-Based Interaction Techniques}},

author = {
Waldner, Manuela
 and 
Kalkusch, Michael
 and 
Schmalstieg, Dieter
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/061-068}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/085-092,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
Three Extensions to Subtractive Crosstalk Reduction}},

author = {
Smit, Ferdi A.
 and 
Liere, Robert van
 and 
Froehlich, Bernd
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/085-092}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/069-076,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
Interactive Exploration of Large Data in Hybrid Visualization Environments}},

author = {
Schirski, Marc
 and 
Bischof, Christian
 and 
Kuhlen, Torsten
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/069-076}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/093-100,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
Supervision of Task-Oriented Multimodal Rendering for VR Applications}},

author = {
Bouyer, Guillaume
 and 
Bourdot, Patrick
 and 
Ammi, Mehdi
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/093-100}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/077-083,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
A GPU-Based Framework of Photometric Uniformity for Multi-Projector Tiled Display}},

author = {
Yuan, Guodong
 and 
Qin, Kaihuai
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/077-083}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/101-108,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
Adaptive Classifier System-Based Dead Reckoning}},

author = {
Torki, Samir
 and 
Torguet, Patrice
 and 
Sanza, Cedric
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/101-108}

}
@inproceedings{
:10.2312/EGVE/IPT_EGVE2007/109-116,

booktitle = {
Eurographics Symposium on Virtual Environments},

editor = {
Bernd Froehlich and Roland Blach and Robert van Liere
},
title = {{
Using Time-of-Flight Range Data for Occlusion Handling in Augmented Reality}},

author = {
Fischer, Jan
 and 
Huhle, Benjamin
 and 
Schilling, Andreas
},
year = {
2007},

publisher = {
The Eurographics Association},


ISSN = {1727-530X},
ISBN = {978-3-905674-02-6},

DOI = {
/10.2312/EGVE/IPT_EGVE2007/109-116}

}

Browse

Recent Submissions

Now showing 1 - 13 of 13
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    Spinnstube: A Seated Augmented Reality Display System
    (The Eurographics Association, 2007) Wind, Jürgen; Riege, Kai; Bogen, Manfred; Bernd Froehlich and Roland Blach and Robert van Liere
    We describe the Spinnstube, a new projection-based Augmented Reality display system for collaborative work environments. By simply attaching the system to a desk, real objects are augmented with virtual objects by using a half-silvered mirror. The display system is designed in a way that its components do not interfere with a table. So a user can freely move his/her hands within the interaction space. A user is able to interact with the system by grabbing and manipulating the real parts under the half-silvered mirror or using task specific input devices to control an application. By arranging up to 4 of these systems around a table, a collaborative work environment can be created.
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    PDRIVE: The Projector-based, Desktop, Reach-In Virtual Environment
    (The Eurographics Association, 2007) Haan, Gerwin de; Griffith, Eric J.; Koutek, Michal; Post, Frits H.; Bernd Froehlich and Roland Blach and Robert van Liere
    This paper presents the Projector-based, Desktop, Reach-In Virtual Environment, or PDRIVE. A PDRIVE user reaches in to the virtual environment, which he views through a mirror. Stereo images are generated by two standard, off-the-shelf DLP projectors, which provides a large display and workspace volume at a relatively low cost. Current prototypes use linear polarization for stereo separation and electromagnetically tracked devices for interaction. The PDRIVE is designed to be easy to set up and configure to suit the user s needs, and a variety of projectors, tracking methods, interaction devices, and stereo separation methods can be used in the system.
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    High Ecological Validity and Accurate Stimulus Control in VR-based Psychological Experiments
    (The Eurographics Association, 2007) Wolter, Marc; Armbruester, Claudia; Valvoda, Jakob T.; Kuhlen, Torsten; Bernd Froehlich and Roland Blach and Robert van Liere
    Virtual Reality (VR) has become a useful tool in psychological therapy, rehabilitation, and basic research. It provides the therapist or scientist with high ecological validity and complete control over multimodal stimuli and the virtual environment. To build lifelike virtual environments, commercial software or game engines are often used. On the other hand, many psychological experiments require an accurate timing of presented stimuli and user reactions, which is not easily obtained by modern hard- and software systems. In this work, we present a VR software for psychological experiments which combines modern computer graphics and Virtual Reality techniques with accurate stimulus and event control. We describe the system features and possibilities for VRbased experiment generation and propose approaches for precise stimulus and event timing. These approaches are evaluated for achievable accuracy in stimulus control and performance monitoring within typical virtual environments.
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    A Comparison of Tracking- and Controller-Based Input for Complex Bimanual Interaction in Virtual Environments
    (The Eurographics Association, 2007) Kunert, Andre; Kulik, Alexander; Huckauf, Anke; Froehlich, Bernd; Bernd Froehlich and Roland Blach and Robert van Liere
    We describe a user study comparing a two-handed controller-based input device to a two-handed tracking solution, both offering the control space of six degrees of freedom to each hand. For benchmarking the different input modalities we implemented a set of evaluation tasks requiring viewpoint navigation, selection and object manipulation in a maze-like virtual environment. The results of the study reveal similar overall performance for both input modalities for compound tasks. However significant differences with respect to the involved subtasks were found. Furthermore we can show that the integral attributes of a subtask do not necessarily need to be manipulated by a single hand. Instead, the simultaneously required degrees of freedom for operating integrally perceived subtasks may also be distributed to both hands for better control.
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    Widget Manipulation Revisited: a Case Study in Modeling Interactions Between Experimental Conditions
    (The Eurographics Association, 2007) Martens, Jean-Bernard; Kok, Arjan; Liere, Robert van; Bernd Froehlich and Roland Blach and Robert van Liere
    Widgets are often used to perform control tasks in three-dimensional (3D) virtual environments (VEs). Spatial interactions through widgets require precise 3D manipulations, and several design aspects of VEs contribute to the ease, accuracy, and speed with which users can perform these interactions. Throughout the years, VE researchers have studied relevant design aspects; for example, the location and size of the widgets, monoscopic versus stereoscopic viewing, the presence or absence of co-location, or the inclusion of (passive) tactile feedback, are all design aspects that have been studied. However, researchers have mostly studied design aspects in isolation and have paid little attention to possible interactions between conditions. In this paper, we introduce a method for modeling interaction effects between experimental conditions and illus- trate it using data from a specific case study, i.e., widget manipulation tasks. More specifically, we model how the effect of passive tactile feedback interacts with stereoscopic viewing for three widget manipulation tasks. We also model how these effects vary between two tasks, i.e., button and menu item selection. Models that include inter- action effects between experimental conditions can be used to get a deeper understanding in the system design trade-offs of a virtual environment.
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    Visual Consistency in Rotational Manipulation Tasks in Sheared-Perceived Virtual Environments
    (The Eurographics Association, 2007) Koutek, Michal; Molenaar, Rene; Haan, Gerwin de; Post, Frits H.; Bernd Froehlich and Roland Blach and Robert van Liere
    Sharing one large screen projection display, such as the Virtual Workbench, with multiple users can cause distortions in viewing and interaction, as the users perceive a sheared and moving space. Generally, object rotation in non-orthogonal, sheared coordinate spaces is something that should be avoided as it consequently invalidates homogeneous geometric object transformations. Although this problem seems to be artificial, in shared multiple-user VR this issue gets a real, substantial flavor. It is typically a problem for the secondary users viewing and interacting with a VR system. Due to rendering the scene from a different viewpoint, they perceive several distortions in the stereo image, one of which is that the VE appears to be sheared. This is also the case in our affordable approach to a multiple user VR Workbench. In this paper we describe technical aspects of our novel viewpoint compensation method to make the object selection, translation, and rotation consistent with the (secondary) user s view of the scene. We focus on description of object rotation inside sheared VE s. We demonstrate that our techniques ensure a sense of interaction consistency despite the view distortions.
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    Optical Magic Lenses and Polarization-Based Interaction Techniques
    (The Eurographics Association, 2007) Waldner, Manuela; Kalkusch, Michael; Schmalstieg, Dieter; Bernd Froehlich and Roland Blach and Robert van Liere
    In this paper we present a novel approach of the magic lens user interface metaphor for large-scale projectorbased displays. We altered a standard polarization-based passive stereo projection setup and employed a standard LCD panel as a purely optical, tangible magic lens device. Due to the properties of polarized light, the modified passive stereo setup can be used to separate two views a primary and a secondary layer of the projected data. A non-powered LCD panel serves as magic lens filter, as it rotates the direction of polarized light 90 degrees, providing the user a different view on the projected data. The system is arbitrarly scalable for multiple users and can be applied to numerous applications. Based on the two projection layers resulting from the proposed setup we explored interaction techniques and present some examples of the system.
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    Three Extensions to Subtractive Crosstalk Reduction
    (The Eurographics Association, 2007) Smit, Ferdi A.; Liere, Robert van; Froehlich, Bernd; Bernd Froehlich and Roland Blach and Robert van Liere
    Stereo displays suffer from crosstalk, an effect that reduces or even inhibits the viewer s ability to correctly fuse stereoscopic images. In this paper, three extensions for improved software crosstalk reduction are introduced. First, we propose a reduction method operating in CIELAB color space to find a perceptually better color match for crosstalk corrected pixels. Second, we introduce a geometry-based reduction method that operates on fused 3D pixels. Finally, a run-time optimization is introduced that avoids the need to process each pixel. We evaluated our CIELAB-based method using the Visible Differences Predictor (VDP). Our results show that we are able to significantly improve crosstalk reduction compared to previously used methods that operate in RGB color space. The combination of our methods provides an improved, real-time software crosstalk reduction framework, applicable to a wider range of scenes, delivering better quality, higher performance, and more flexibility.
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    Interactive Exploration of Large Data in Hybrid Visualization Environments
    (The Eurographics Association, 2007) Schirski, Marc; Bischof, Christian; Kuhlen, Torsten; Bernd Froehlich and Roland Blach and Robert van Liere
    With rising data sizes and growing complexity, the results of modern numerical simulations are increasingly dif- ficult to understand. Thus, using Virtual Reality methodology for an interactive analysis of such data gains more and more importance. However, interaction within virtual environments comes at the cost of real-time constraints, which are difficult to meet. Using a hybrid visualization environment consisting of a high-performance computing (HPC) system connected to a graphics workstation (or multiple rendering nodes) we propose a workload distribution which significantly increases interactivity during the data analysis process. Based on a novel model of the exploration process, we introduce an additional step into the conventional visualization pipeline before mapping the whole process onto system components. This incorporates the respective benefits of high-performance computing and GPU-based computation into a single visualization framework. Basically, by coupling an HPC-based extraction of a region-of-interest to GPU-based flow visualization, an interactive analysis of large datasets is made possible. Taking interactive particle tracing and volume rendering as examples, we show the applicability of our approach to an interactive exploration of datasets exceeding the memory limits of a single workstation.
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    Supervision of Task-Oriented Multimodal Rendering for VR Applications
    (The Eurographics Association, 2007) Bouyer, Guillaume; Bourdot, Patrick; Ammi, Mehdi; Bernd Froehlich and Roland Blach and Robert van Liere
    This article addresses the question of integrating multimodal rendering in Virtual Reality applications. It exposes first the interest of multimedia intelligent systems to improve human activity in Virtual Environments. Then it details the conception of a software module in charge of supervising multimodal information rendering, depending on the interaction and its context. From existing psychophysical studies and concrete applications, we propose a model, an architecture and a decision process. Finally a first implementation is presented to validate the core of the simulator and show the adaptability of its knowledge base.
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    A GPU-Based Framework of Photometric Uniformity for Multi-Projector Tiled Display
    (The Eurographics Association, 2007) Yuan, Guodong; Qin, Kaihuai; Bernd Froehlich and Roland Blach and Robert van Liere
    In this paper, we firstly propose a partial-sampling scheme to measure the intensity transfer function of a projector. Secondly, we implement the computation of luminance surface by rendering a texture rectangle on GPU. Thirdly, we generate an unified index data for all projectors. And then we compute the masks of photometric correction using a GPU based on topological consistency. Finally we integrate the masks with a GPU-based photometric correction pipeline to achieve the photometric uniformity for multi-projector display. The GPU-based framework is a combination of the GPU-based computation and the GPU-based photometric correction pipeline, which removes the bottleneck of the computation of luminance surface, attenuation mask and black offset mask. It is shown by experimental results prove that the GPU-based framework is effective and efficient.
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    Adaptive Classifier System-Based Dead Reckoning
    (The Eurographics Association, 2007) Torki, Samir; Torguet, Patrice; Sanza, Cedric; Bernd Froehlich and Roland Blach and Robert van Liere
    Most dead reckoning implementations are based on DIS specifications and only use a single prediction model during the whole simulation. However, several studies manage to improve dead reckoning s performance by defining prediction model selection strategies. Nevertheless, these approaches are either too generic and based on empirical results or too specific and only have few fields of application. This paper presents our approach that is meant to determine, among a set of extrapolation models, the one to apply in any given situation. It is based on classifier systems, adaptive evolutionary systems that are more generally involved to create artificial creatures in the field of artificial life . Using such systems enable us to define a general model that can generate simulation-specific rules with relatively little work. Indeed, they just require defining the parameters that have to be taken into account and the criteria to optimize (e.g. accuracy, amount of updates...). Then, the system makes a set of rules emerge through a trial/error process in order to define more efficient and finer prediction model selection strategies.
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    Using Time-of-Flight Range Data for Occlusion Handling in Augmented Reality
    (The Eurographics Association, 2007) Fischer, Jan; Huhle, Benjamin; Schilling, Andreas; Bernd Froehlich and Roland Blach and Robert van Liere
    One of the main problems of monoscopic video see-through augmented reality (AR) is the lack of reliable depth information. This makes it difficult to correctly represent complex spatial interactions between real and virtual objects, e.g., when rendering shadows. The most obvious graphical artifact is the incorrect display of the occlusion of virtual models by real objects. Since the graphical models are rendered opaquely over the camera image, they always appear to occlude all objects in the real environment, regardless of the actual spatial relationship. In this paper, we propose to utilize a new type of hardware in order to solve some of the basic challenges of AR rendering. We introduce a depth-of-flight range sensor into AR, which produces a 2D map of the distances to real objects in the environment. The distance map is registered with high resolution color images delivered by a digital video camera. When displaying the virtual models in AR, the distance map is used in order to decide whether the camera image or the virtual object is visible at any position. This way, the occlusion of virtual models by real objects can be correctly represented. Preliminary results obtained with our approach show that a useful occlusion handling based on time-of-flight range data is possible.