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Auflistung nach Autor:in "Reis, Gerd"

1 - 3 von 3
  • Konferenzbeitrag
    The Gesture Authoring Space: Authoring Customised Hand Gestures for Grasping Virtual Objects in Immersive Virtual Environments
    (Mensch und Computer 2022 - Tagungsband, 2022) Schäfer, Alexander; Reis, Gerd; Stricker, Didier
    Natural user interfaces are on the rise. Manufacturers for Augmented, Virtual, and Mixed Reality head mounted displays are increasingly integrating new sensors into their consumer grade products, allowing gesture recognition without additional hardware. This offers new possibilities for bare handed interaction within virtual environments. This work proposes a hand gesture authoring tool for object specific grab gestures allowing virtual objects to be grabbed as in the real world. The presented solution uses template matching for gesture recognition and requires no technical knowledge to design and create custom tailored hand gestures. In a user study, the proposed approach is compared with the pinch gesture and the controller for grasping virtual objects. The different grasping techniques are compared in terms of accuracy, task completion time, usability, and naturalness. The study showed that gestures created with the proposed approach are perceived by users as a more natural input modality than the others.
  • Konferenzbeitrag
    Investigating the Sense of Presence Between Handcrafted and Panorama Based Virtual Environments
    (Mensch und Computer 2021 - Tagungsband, 2021) Schäfer, Alexander; Reis, Gerd; Stricker, Didier
    Virtual Reality applications are becoming increasingly mature. The requirements and complexity of such systems is steadily increasing. Realistic and detailed environments are often omitted in order to concentrate on the interaction possibilities within the application. Creating an accurate and realistic virtual environment is not a task for laypeople, but for experts in 3D design and modeling. To save costs and avoid hiring experts, panorama images are often used to create realistic looking virtual environments. These images can be captured and provided by non-experts. Panorama images are an alternative to handcrafted 3D models in many cases because they offer immersion and a scene can be captured in great detail with the touch of a button. This work investigates whether it is advisable to recreate an environment in detail by hand or whether it is recommended to use panorama images for virtual environments in certain scenarios. For this purpose, an interactive virtual environment was created in which a handmade 3D environment is almost indistinguishable from an environment created with panorama images. Interactive elements were added and a user study was conducted to investigate the effect of both environments to the user. The study conducted indicates that panorama images can be a useful substitute for 3D modeled environments.
  • Konferenzbeitrag
    Towards Collaborative Photorealistic VR Meeting Rooms
    (Mensch und Computer 2019 - Tagungsband, 2019) Schäfer, Alexander; Reis, Gerd; Stricker, Didier
    When designing 3D applications it is necessary to find acompromise between necessary cost (e.g.money, time) andachievable realism of the virtual environment. Reusing exist-ing assets has an impact on the uniqueness of the applicationand creating high quality 3D assets is very time consumingand expensive. Therefore, typical 3D applications have limitson graphical quality. In general one could say that applica-tions are not deliberately kept simple in terms of graphicalquality, the simplified quality is rather the consequence ofcost and time savings. We aim for a low cost, high quality andminimal time effort solution to create virtual environments.We explore the scenario of virtual meetings in context of VRsince it is of great interest not only in research but also inindustry. This paper’s main contribution is a novel way ofcreating a virtual meeting application by utilizing augmentedspherical images for photo realistic virtual environments.