This file was created by the Typo3 extension sevenpack version 0.7.14 --- Timezone: CEST Creation date: 2013-05-24 Creation time: 18-45-29 --- Number of references 3 inproceedings 4544 Proceedings of the 13th Eurographics Symposium on Virtual Environments and 10th Immersive Projection Technology Workshop (IPT-EGVE 2007) 2007 7 85-88 Full-body motion tracking data was collected for six subjects during free walking. Each participant was asked to walk to a previously seen target under four experimental conditions: eyes closed within the real world, eyes closed wearing a head-mounted display (HMD), eyes open in the real world, and eyes open wearing a HMD. We report three gait parameters for each of these four conditions: stride length, walking velocity, and head-trunk angle. This data reveals that these gait parameters within a HMD virtual environment (VE) are different than those in the real world. A person wearing a HMD and backpack walks slower, and takes a shorter stride length than they do in a comparable real world condition. In addition, head-trunk angle while walking to a target on the ground plane is lowest when walking with eyes open in a HMD VE. http://www.kyb.tuebingen.mpg.de/fileadmin/user_upload/files/publications/Final_EGVR2007_4544[0].pdf http://www.kyb.tuebingen.mpg.de http://www.kyb.tuebingen.mpg.de Department Bülthoff http://nguyendangbinh.org/Proceedings/IPT-EGVE/2007/publications.html Fröhlich, B. , R. Blach, R. van Liere Eurographics Association

Aire-la-Ville, Switzerland

Biologische Kybernetik Max-Planck-Gesellschaft Weimar, Germany 13th Eurographics Symposium on Virtual Environments and 10th Immersive Projection Technology Workshop (IPT-EGVE 2007) en 978-1-568-81400-1 mohlerBMohler camposjlJCampos weyelMWeyel hhbHHBülthoff techreport 3516 2005 8 142 The virtual environments library (veLib) is a light-weight yet complete cross-platform software framework for distributed virtual reality (VR) simulations. This document describes its basic design principles, the installation process, and gives a brief introduction in using the veLib for programming VR applications. The introductory texts are complemented by a comprehensive description of the C++ and XML application programmers’ interface (API). http://www.kyb.tuebingen.mpg.de/fileadmin/user_upload/files/publications/TR-142_[0].pdf http://www.kyb.tuebingen.mpg.de http://www.kyb.tuebingen.mpg.de Department Bülthoff http://velib.kyb.mpg.de Biologische Kybernetik Max-Planck-Gesellschaft Max Planck Institute for Biological Cybernetics, Tübingen, Germany en gfGFranz weyelMWeyel poster 4545 2007 7 10 125 It has been shown that virtual environment (VE) users make systematic errors of distance compression when acting on or judging a virtual space (blind-walking to targets on the ground plane or verbal reports [1,3]). This bias in behavior can, in part, be explained by the mechanics of the head-mounted display (HMD). Willemsen et al. [3] have developed a modified HMD in which the visual display has been removed and yet weight distribution is kept consistent with that of a functional HMD. When participants view the real world through this modified HMD they undershoot their blind-walking performance. Willemsen et al.’s research suggests that the weight or ergonomics of the HMD influences the distance traversed while performing a blind walking task [2]. In the current research, we consider four different conditions: walking with eyes closed within the real world, eyes closed wearing a HMD, eyes open in the real world, and eyes open wearing a HMD. By investigating these four conditions we can access whether there are differences in gait parameters due to the physical constraints of the HMD and/or due to the differences between the visual experience in the HMD and the real world. Full-body motion tracking data was collected for six participants while they walked to a previously seen target at 8 randomly ordered distances (3,4,5,6,7, 8, 9 and 10 meters). We report three gait parameters for each of these four conditions: stride length, walking velocity, and head-trunk angle. This data reveals that these gait parameters within a HMD VE are different than those in the real world. A person wearing a HMD and backpack walks slower and takes a shorter stride length than they do in a comparable real world condition. In addition, head-trunk angle while walking to a target on the ground plane is lowest when walking with eyes open when wearing a HMD. While future research should investigate the influence of gait parameters on human perception of the active observer, the sole objective of the current research was to analyze the differences between gait parameters while walking within a HMD and the real world. http://www.kyb.tuebingen.mpg.de http://www.kyb.tuebingen.mpg.de http://www.kyb.tuebingen.mpg.de Department Bülthoff http://twk.tuebingen.mpg.de/twk07/abstract.php?_load_id=mohler01 Biologische Kybernetik Max-Planck-Gesellschaft Tübingen, Germany 10th Tübinger Wahrnehmungskonferenz (TWK 2007) en mohlerBJMohler camposjlJLCampos weyelMBWeyel hhbHHBülthoff