International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments最新文献_第2页

Widget manipulation revisited: a case study in modeling interactions between experimental conditions 小部件操作重访:实验条件之间建模交互的案例研究

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2007-07-15 DOI: 10.2312/EGVE/IPT_EGVE2007/053-060

J. Martens, A. Kok, R. V. Liere

{"title":"Widget manipulation revisited: a case study in modeling interactions between experimental conditions","authors":"J. Martens, A. Kok, R. V. Liere","doi":"10.2312/EGVE/IPT_EGVE2007/053-060","DOIUrl":"https://doi.org/10.2312/EGVE/IPT_EGVE2007/053-060","url":null,"abstract":"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.\u0000 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.","PeriodicalId":210571,"journal":{"name":"International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114639561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A comparison of tracking- and controller-based input for complex bimanual interaction in virtual environments 虚拟环境中基于跟踪和控制器的复杂人机交互输入的比较

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2007-07-15 DOI: 10.2312/EGVE/IPT_EGVE2007/043-052

André Kunert, Alexander Kulik, A. Huckauf, B. Fröhlich

引用次数: 15

Three extensions to subtractive crosstalk reduction 减法串扰消减的三个扩展

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2007-07-15 DOI: 10.2312/EGVE/IPT_EGVE2007/085-092

F. Smit, R. V. Liere, B. Fröhlich

引用次数: 16

Wearable mixed reality system In less than 1 pound

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2006-05-08 DOI: 10.2312/EGVE/EGVE06/035-044

A. Peternier, F. Vexo, D. Thalmann

引用次数: 14

Managing missed interactions in distributed virtual environments 管理分布式虚拟环境中错过的交互

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2006-05-08 DOI: 10.2312/EGVE/EGVE06/027-034

S. Parkin, Péter András, G. Morgan

引用次数: 3

Measuring the discernability of virtual objects in conventional and stylized augmented reality 测量传统和程式化增强现实中虚拟物体的可识别性

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2006-05-08 DOI: 10.2312/EGVE/EGVE06/053-061

J. Fischer, D. Cunningham, D. Bartz, C. Wallraven, H. Bülthoff, W. Straßer

{"title":"Measuring the discernability of virtual objects in conventional and stylized augmented reality","authors":"J. Fischer, D. Cunningham, D. Bartz, C. Wallraven, H. Bülthoff, W. Straßer","doi":"10.2312/EGVE/EGVE06/053-061","DOIUrl":"https://doi.org/10.2312/EGVE/EGVE06/053-061","url":null,"abstract":"In augmented reality, virtual graphical objects are overlaid over the real environment of the observer. Conventional augmented reality systems normally use standard real-time rendering methods for generating the graphical representations of virtual objects. These renderings contain the typical artifacts of computer generated graphics, e.g., aliasing caused by the rasterization process and unrealistic, manually configured illumination models. Due to these artifacts, virtual objects look artifical and can easily be distinguished from the real environment.\u0000 A different approach to generating augmented reality images is the basis of stylized augmented reality [FBS05c]. Here, similar types of artistic or illustrative stylization are applied to the virtual objects and the camera image of the real enviroment. Therefore, real and virtual image elements look significantly more similar and are less distinguishable from each other.\u0000 In this paper, we present the results of a psychophysical study on the effectiveness of stylized augmented reality. In this study, a number of participants were asked to decide whether objects shown in images of augmented reality scenes are virtual or real. Conventionally rendered as well as stylized augmented reality images and short video clips were presented to the participants. The correctness of the participants' responses and their reaction times were recorded. The results of our study show that an equalized level of realism is achieved by using stylized augmented reality, i.e., that it is significantly more difficult to distinguish virtual objects from real objects.","PeriodicalId":210571,"journal":{"name":"International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123107080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

A multi modal table-top 3D modeling tool in augmented environments 增强环境中的多模态桌面3D建模工具

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2006-05-08 DOI: 10.2312/EGVE/EGVE06/045-052

Thomas Novotny, I. Lindt, Wolfgang Broll

引用次数: 2

Model-based hybrid tracking for medical augmented reality 基于模型的医疗增强现实混合跟踪

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2006-05-08 DOI: 10.2312/EGVE/EGVE06/071-080

J. Fischer, Michael Eichler, D. Bartz, W. Straßer

{"title":"Model-based hybrid tracking for medical augmented reality","authors":"J. Fischer, Michael Eichler, D. Bartz, W. Straßer","doi":"10.2312/EGVE/EGVE06/071-080","DOIUrl":"https://doi.org/10.2312/EGVE/EGVE06/071-080","url":null,"abstract":"Camera pose estimation is one of the most important, but also one of the most challenging tasks in augmented reality. Without a highly accurate estimation of the position and orientation of the digital video camera, it is impossible to render a spatially correct overlay of graphical information. This requirement is even more crucial in medical applications, where the virtual objects are supposed to be correctly aligned with the patient. Many medical AR systems use specialized tracking devices, which can be of limited suitability for real-world scenarios. We have developed an AR framework for surgical applications based on existing medical equipment. A surgical navigation device delivers tracking information measured by a built-in infrared camera system, which is the basis for the pose estimation of the AR video camera. However, depending on the conditions in the environment, this infrared pose data can contain discernible tracking errors. One main drawback of the medical tracking device is the fact that, while it delivers a very high positional accuracy, the reported camera orientation can contain a relatively large error.\u0000 In this paper, we present a hybrid tracking scheme for medical augmented reality based on a certified medical tracking system. The final pose estimation takes the inital infrared tracking data as well as salient features in the camera image into account. The vision-based component of the tracking algorithm relies on a pre-defined graphical model of the observed scene. The infrared and vision-based tracking data are tightly integrated into a unified pose estimation algorithm. This algorithm is based on an iterative numerical optimization method. We describe an implementation of the algorithm and present experimental data showing that our new method is capable of delivering a more accurate pose estimation.","PeriodicalId":210571,"journal":{"name":"International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133560010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

A model for the expected running time of collision detection using AABBs trees 基于AABBs树的碰撞检测预期运行时间模型

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2006-05-08 DOI: 10.2312/EGVE/EGVE06/011-017

René Weller, Jan Klein, G. Zachmann

引用次数: 1

Camera setup optimization for optical tracking in virtual environments 虚拟环境中光学跟踪的相机设置优化

International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments Pub Date : 2006-05-08 DOI: 10.2312/EGVE/EGVE06/081-088

Philippe Cerfontaine, M. Schirski, Daniel Bündgens, T. Kuhlen

{"title":"Camera setup optimization for optical tracking in virtual environments","authors":"Philippe Cerfontaine, M. Schirski, Daniel Bündgens, T. Kuhlen","doi":"10.2312/EGVE/EGVE06/081-088","DOIUrl":"https://doi.org/10.2312/EGVE/EGVE06/081-088","url":null,"abstract":"In this paper we present a method for finding the optimal camera alignment for a tracking system with multiple cameras, by specifying the volume that should be tracked and an initial camera setup. The approach we use is twofold: on the one hand, we use a rather simple gradient based steepest descent method and on the other hand, we also implement a simulated annealing algorithm that features guaranteed optimality assertions. Both approaches are fully automatic and take advantage of modern graphics hardware since we implemented a GPU-based accelerated visibility test. The proposed algorithms can automatically optimize the whole camera setup by adjusting the given set of parameters. The optimization may have different goals depending on the desired application, e.g. one may wish to optimize towards the widest possible coverage of the specified volume, while others would prefer to maximize the number of cameras seeing a certain area to overcome heavy occlusion problems during the tracking process. Our approach also considers parameter constraints that the user may specify according to the local environment where the cameras have to be set up. This makes it possible to simply formulate higher level constraints e.g. all cameras have a vertical up vector. It individually adapts the optimization to the given situation and also asserts the feasibility of the algorithm's output.","PeriodicalId":210571,"journal":{"name":"International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127173151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1