Comparing World and Screen Coordinate Systems in Optical See-Through Head-Mounted Displays for Text Readability while Walking

Shogo Fukushima, Takeo Hamada, Ari Hautasaari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)

Abstract

Augmented reality (AR) optical-see-through (OST) head-mounted displays (HMD) have developed to a point where browsing information on the go is possible. In this paper, we investigate the readability of text on an AR HMD while the user is walking. There are two common methods of displaying text on a HMD: anchoring the text on the screen coordinate system or the world coordinate system. We report on the results of two laboratory experiments comparing text readability when the text is displayed in these two coordinate systems, and while the participants walked on a treadmill. In the first experiment, the participants read letter strings comprising Sloane letters, whereas the second experiment used English words. In addition to evaluating the text readability and workload experienced by participants, we employed IMU sensors to compare the effects of the text display method on the participants' head movement and gait. In both experiments, the reading speed and head movement were significantly higher and mental workload significantly lower for the world coordinate system than for the screen coordinate system. These results suggest that text readability while walking is better on the world coordinate system, and displaying text with the screen coordinate system results in an unnatural gait owing to the user trying to keep their head still in an effort to stabilize the HMD screen.

Original languageEnglish
Title of host publicationProceedings - 2020 IEEE International Symposium on Mixed and Augmented Reality, ISMAR 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages649-658
Number of pages10
ISBN (Electronic)9781728185088
DOIs
Publication statusPublished - Nov 2020
Externally publishedYes
Event19th IEEE International Symposium on Mixed and Augmented Reality, ISMAR 2020 - Virtual, Recife/Porto de Galinhas, Brazil
Duration: Nov 9 2020Nov 13 2020

Publication series

NameProceedings - 2020 IEEE International Symposium on Mixed and Augmented Reality, ISMAR 2020

Conference

Conference19th IEEE International Symposium on Mixed and Augmented Reality, ISMAR 2020
Country/TerritoryBrazil
CityVirtual, Recife/Porto de Galinhas
Period11/9/2011/13/20

All Science Journal Classification (ASJC) codes

  • Computer Vision and Pattern Recognition
  • Computer Science Applications
  • Software

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