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Towards a 2D tactile vocabulary for navigation of blind and visually impaired

Published: 11 October 2009 Publication History

Abstract

In this paper we present research work towards a 2D tactile vocabulary for training visually impaired for their independent mobility. The vocabulary is associated to a 2D tactile array (vibration array), which is a part of a wearable navigation prototype (Electronic Travel Aid) called Tyflos. The vibration array is currently consisting of 16 vibrating elements arranged in a 4×4 manner. Each motor can be independently driven with square pulses of varying frequencies. The vibration array can represent dynamically the 3D space of the user's field of view: the 2D arrangement represent the x-y coordinates while the frequencies represent the z coordinate (which is the distance of an obstacle from the user). Different navigation and human factor criteria have been used to create the 2D tactile vocabulary. Finally, using the continuous feedback from the users, the goal is to balance between a minimal vocabulary for easy learning and a rich vocabulary that will still be able to represent efficiently the 3D navigation space.

References

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American Foundation for the Blind: http://www.afb.org/
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Blasch, B.B., Wiener, W.R. and Welsh R.L., Foundations of orientation and mobility, 2nd edition, AFB Press, 1997.
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Dakopoulos, D., Boddhu, S. K., Bourbakis, N. A 2D Vibration Array as an Assistive Device for Visually Impaired, 7th IEEE International Conference on Bioinformatics and Bioengineering, Vol. 1, 14-17 October 2007, Boston, MA, USA, pp. 930-937.
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Dakopoulos, D., N. Bourbakis, N. Wearable Obstacle Avoidance Electronic Travel Aids: a Survey, IEEE Trans. Systems, Man and Cybernetics, to appear 2009.
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Chouvardas, V.G., Miliou, A.N., Hatalis, M.K. Tactile Displays: Overview and recent advances, Displays, Vol. 29, 2008, pp. 185-194.
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N. Bourbakis, R. Keefer, D. Dakopoulos, A. Esposito, "A Multimodal Interaction Scheme Between a Blind User and the Tyflos Assistive Prototype", 20th IEEE International Conference on Tools With Artificial Intelligence (ICTAI 2008), Dayton, OH, USA, 3-5 November 2008.
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  • (2017)Camera-based mobile electronic travel aids support for cognitive mapping of unknown spacesProceedings of the 19th International Conference on Human-Computer Interaction with Mobile Devices and Services10.1145/3098279.3098563(1-10)Online publication date: 4-Sep-2017
  • (2015)An Empirical Study for Examining the Performance of Visually Impaired People in Recognizing Shapes through a Vibro-tactile FeedbackProceedings of the 17th International ACM SIGACCESS Conference on Computers & Accessibility10.1145/2700648.2811373(349-350)Online publication date: 26-Oct-2015
  • (2014)TActile Glasses TAG for Obstacle AvoidanceProceedings of the 8th International Conference on Universal Access in Human-Computer Interaction. Aging and Assistive Environments - Volume 851510.1007/978-3-319-07446-7_70(741-749)Online publication date: 22-Jun-2014
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cover image Guide Proceedings
SMC'09: Proceedings of the 2009 IEEE international conference on Systems, Man and Cybernetics
October 2009
5232 pages
ISBN:9781424427932

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IEEE Press

Publication History

Published: 11 October 2009

Author Tags

  1. ETA
  2. blind's navigation
  3. electronic travel aid
  4. tactile display
  5. tactile vocabulary
  6. vibration array
  7. visually impaired

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