Publikationen | Hochschule Flensburg

2019

Preparing and Guiding Forensic Crime Scene Inspections in Virtual Reality

Süncksen, M., Teistler, M., Hamester, F., & Ebert, L. (2019). Preparing and Guiding Forensic Crime Scene Inspections in Virtual Reality. In Proceedings of Mensch Und Computer 2019 (S. 755–758). New York, NY, USA: Association for Computing Machinery. http://doi.org/10.1145/3340764.3344903

Abstract

Computer-based scene reconstruction is a method for answering specific forensic questions in the context of accident or crime scenes. For the resulting 3D reconstruction, the use of virtual reality (VR) technology is a novel presentation form. For the presentation to a prosecutor, the need to put visible content into context awards special significance to the moderator, especially as in a VR presentation the head mounted display (HMD) cuts VR users off from their natural environment. We analyze use cases for the parties involved in the courtroom VR presentation and consider the author, moderator and spectator roles and their corresponding session types for creating, directing and watching the presentation. A prototype system has been implemented to allow for suitable VR interactions for the three roles. An evaluation of the system with 12 participants assuming the role of the spectator yielded positive results with regard to the user experience and utility.

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Improving Readability of Text in Realistic Virtual Reality Scenarios: Visual Magnification Without Restricting User Interactions

Knaack, L., Lache, A. -K., Preikszas, O., Reinhold, S., & Teistler, M. (2019). Improving Readability of Text in Realistic Virtual Reality Scenarios: Visual Magnification Without Restricting User Interactions. In Proceedings of Mensch Und Computer 2019 (S. 749–753). New York, NY, USA: Association for Computing Machinery. http://doi.org/10.1145/3340764.3344902

Abstract

The resolution of current head-mounted displays leads to poor readability of text inrealistic virtual reality (VR) simulations. This results in unnatural user behavior. Here, three approaches for improving the readability of text in VR have been investigated:1) constantly magnifying a part of the screen (version "lens"), 2) magnifying sceneelements such as signs depending on the gaze direction (version "magnify") and3) augmenting the scene by adding floating texts (version "AR"). These approaches havebeen implemented as prototypes and tested by twelve users, using a virtual supermarketas an exemplary VR scene. The participants filled out a questionnaire, rating theirexperience with the different approaches. Additionally, the time required for readinggiven texts (price tags) has been measured and compared for each approach. With theAR version, the reading time was significantly shorter than the reading time without anyaids. The other versions offered no advantages. The AR version was also rated best in thequalitative evaluation. However, the other versions offer potential for improvement, which can be addressed in future research.