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Text readability in head-worn displays: color and style optimization in video versus optical see-through devices.

Authors
  • Debernardis, Saverio
  • Fiorentino, Michele
  • Gattullo, Michele
  • Monno, Giuseppe
  • Uva, Antonio Emmanuele
Type
Published Article
Journal
IEEE Transactions on Visualization and Computer Graphics
Publisher
Institute of Electrical and Electronics Engineers
Publication Date
Jan 01, 2014
Volume
20
Issue
1
Pages
125–139
Identifiers
DOI: 10.1109/TVCG.2013.86
PMID: 24201331
Source
Medline
License
Unknown

Abstract

Efficient text visualization in head-worn augmented reality (AR) displays is critical because it is sensitive to display technology, text style and color, ambient illumination and so on. The main problem for the developer is to know the optimal text style for the specific display and for applications where color coding must be strictly followed because it is regulated by laws or internal practices. In this work, we experimented the effects on readability of two head-worn devices (optical and video see-through), two backgrounds (light and dark), five colors (white, black, red, green, and blue), and two text styles (plain text and billboarded text). Font type and size were kept constant. We measured the performance of 15 subjects by collecting about 5,000 measurements using a specific test application and followed by qualitative interviews. Readability turned out to be quicker on the optical see-through device. For the video see-through device, background affects readability only in case of text without billboard. Finally, our tests suggest that a good combination for indoor augmented reality applications, regardless of device and background, could be white text and blue billboard, while a mandatory color should be displayed as billboard with a white text message.

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