Evaluation on perceived sizes using large-scale augmented floor visualization devices
Michael Otto, Eva Lampen, Philipp Agethen, Mareike Langohr, Gerald Masan, Enrico Rukzio · 2019
Large scale output displays are an enabling technology in order to achieve immersive, isometrically registered, virtual environments. Amongst other benefits, pervasive displays allow for more accurate size judgments, better collaboration performance in workshops and less task completion time. Since research still does not offer an holistic view on size perception and reaction time using wall-sized displays, this paper follows a call for research. This evaluation investigates the size judgment accuracy, precision and reaction time using a large scale led floor compared to tablet computer with relative scales. Therefore, an output apparatus is presented using a 54 sqm LED floor surrounded by additional 36 square meters of LED walls. Using this apparatus, 22 participants were provided with the same virtual contents in 3 different scenarios. The baseline scenario (tablet computer) visualizes relative sized geometry, whereas two LED floor scenarios show true to scale (absolute sized) contents. Results indicate that using true to scale visualization of 2D contents on a LED floor reduces mean absolute percentage error (MAPE) of spatial estimations significantly and is the user's preferred visualization device. No systematic over- or underestimation of size judgments could be revealed for all three scenarios. In contrast to that, task completion time rises by using such an apparatus.