Sebastian Pape, M.Sc.
Room K111
Phone: +49 241 80 24378
Fax: +49 241 80 22134
Email: pape@vr.rwth-aachen.de

Virtual Reality Team


DasherVR: Evaluating a Predictive Text Entry System in Immersive Virtual Reality

Sebastian Pape, Jan Jakub Ackermann, Tim Weissker, Torsten Wolfgang Kuhlen
Towards an Inclusive and Accessible Metaverse Workshop at CHI'23

Inputting text fluently in virtual reality is a topic still under active research, since many previously presented solutions have drawbacks in either speed, error rate, privacy or accessibility. To address these drawbacks, in this paper we adapted the predictive text entry system "Dasher" into an immersive virtual environment. Our evaluation with 20 participants shows that Dasher offers a good user experience with input speeds similar to other virtual text input techniques in the literature while maintaining low error rates. In combination with positive user feedback, we therefore believe that DasherVR is a promising basis for further research on accessible text input in immersive virtual reality.

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title = {{{DasherVR}}: {{Evaluating}} a {{Predictive Text Entry System}} in {{Immersive Virtual Reality}}},
booktitle = {Towards an {{Inclusive}} and {{Accessible Metaverse}} at {{CHI}}'23},
author = {Pape, Sebastian and Ackermann, Jan Jakub and Weissker, Tim and Kuhlen, Torsten W},
doi = {https://doi.org/10.18154/RWTH-2023-05093},
year = {2023}

Poster: Virtual Optical Bench: A VR Learning Tool For Optical Design

Sebastian Pape, Martin Bellgardt, David Gilbert, Georg König, Torsten Wolfgang Kuhlen
IEEE Conference on Virtual Reality and 3D User Interfaces 2021

The design of optical lens assemblies is a difficult process that requires lots of expertise. The teaching of this process today is done on physical optical benches, which are often too expensive for students to purchase. One way of circumventing these costs is to use software to simulate the optical bench. This work presents a virtual optical bench, which leverages real-time ray tracing in combination with VR rendering to create a teaching tool which creates a repeatable, non-hazardous, and feature-rich learning environment. The resulting application was evaluated in an expert review with 6 optical engineers.

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author = {Pape, Sebastian and Bellgardt, Martin and Gilbert, David and König, Georg and Kuhlen, Torsten W.},
booktitle = {2021 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW)},
title = {Virtual Optical Bench: A VR learning tool for optical design},
year = {2021},
volume ={},
number = {},
pages = {635-636},
doi = {10.1109/VRW52623.2021.00200}

Calibratio - A Small, Low-Cost, Fully Automated Motion-to-Photon Measurement Device

Sebastian Pape, Marcel Krüger, Jan Müller, Torsten Wolfgang Kuhlen
10th Workshop on Software Engineering and Architectures for Realtime Interactive Systems (SEARIS), 2020

Since the beginning of the design and implementation of virtual environments, these systems have been built to give the users the best possible experience. One detrimental factor for the user experience was shown to be a high end-to-end latency, here measured as motionto-photon latency, of the system. Thus, a lot of research in the past was focused on the measurement and minimization of this latency in virtual environments. Most existing measurement-techniques require either expensive measurement hardware like an oscilloscope, mechanical components like a pendulum or depend on manual evaluation of samples. This paper proposes a concept of an easy to build, low-cost device consisting of a microcontroller, servo motor and a photo diode to measure the motion-to-photon latency in virtual reality environments fully automatically. It is placed or attached to the system, calibrates itself and is controlled/monitored via a web interface. While the general concept is applicable to a variety of VR technologies, this paper focuses on the context of CAVE-like systems.

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author = {Sebastian Pape and Marcel Kr\"{u}ger and Jan M\"{u}ller and Torsten W. Kuhlen},
title = {{Calibratio - A Small, Low-Cost, Fully Automated Motion-to-Photon Measurement Device}},
booktitle = {10th Workshop on Software Engineering and Architectures for Realtime Interactive Systems (SEARIS)},
year = {2020},

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