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i-com Band 20 (2021) Heft 1

https://dl.gi.de/handle/20.500.12116/36425
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Auflistung i-com Band 20 (2021) Heft 1 nach Schlagwort "Augmented Reality"

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  • Zeitschriftenartikel
    Evaluation of an Augmented Reality Instruction for a Complex Assembly Task - Comparison of a Smartphone-Based Augmented Reality Instruction with a Conventional Paper Instruction for the Teach-in Phase in Manual Assembly
    (i-com: Vol. 20, No. 1, 2021) Funk, Johannes; Schmidt, Ludger
    This study compares the use of a marker-based AR instruction with a paper instruction commonly used in manual assembly. Hypotheses were tested as to whether the instruction type affects assembly time, number of errors, usability, and employee strain. Instead of student participants and artificial assembly tasks (e. g. Lego assemblies), the study was conducted with 16 trainees in a real workplace for the assembly of emergency door release handles in rail vehicles. Five assembly runs were performed. Assembly times and assembly errors were determined from recorded videos. Usability (SUS) and strain (NASA-TLX) were recorded with questionnaires. After a slower assembly at the beginning, the AR group assembled significantly faster in the fifth run. The comparable number of errors, usability and strain make marker-based AR applications interesting for knowledge transfer in manual assembly, especially due to the easy entrance and low costs.
  • Zeitschriftenartikel
    The SmARtphone Controller - Leveraging Smartphones as Input and Output Modality for Improved Interaction within Mobile Augmented Reality Environments
    (i-com: Vol. 20, No. 1, 2021) Knierim, Pascal; Hein, Dimitri; Schmidt, Albrecht; Kosch, Thomas
    Current interaction modalities for mobile Augmented Reality (AR) are tedious and lack expressiveness. To overcome these prevalent limitations, we developed and evaluated a multimodal interaction concept by pairing a smartphone as an input and output modality for mobile AR. In a user study (n = 24), we investigated the effects on interaction speed, accuracy, and task load for (1) virtual object manipulation as well as (2) interaction with established graphical user interfaces (GUIs). Our findings show that a smartphone-based AR controller results in significantly faster and more accurate object manipulation with reduced task load than state-of-art mid-air gestures. Our results also indicate a significant enhancement for using the physical touchscreen as a modality compared to mid-air gestures for GUI interaction. We conclude that interaction in mobile AR environments can be improved by utilizing a smartphone as an omnipresent controller. Additionally, we discuss how future AR systems can benefit from tangible touchscreens as an additional and complementary interaction modality.