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Laterotactile Rendering of Vector Graphics with the Stroke Pattern

  • Vincent Lévesque
  • Vincent Hayward
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6192)

Abstract

Raised line patterns are used extensively in the design of tactile graphics for persons with visual impairments. A tactile stroke pattern was therefore developed to enable the rendering of vector graphics by lateral skin deformation. The stroke pattern defines a transversal profile and a longitudinal texture which provide tactile feedback while respectively crossing over the stroke and tracing its length. The stroke pattern is demonstrated with the rendering of lines, circles and polygons, and is extensible to other vector graphics primitives such as curves. The parametric nature of the stroke allows the representation of distinctive line types and the online adjustment of line thickness and other parameters according to user preferences and capabilities. The stroke pattern was informally evaluated with four visually impaired volunteers.

Keywords

assistive technology tactile graphics tactile display haptic rendering laterotactile rendering 

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References

  1. 1.
    Edman, P.K.: Tactile Graphics. AFB Press, New York (1992)Google Scholar
  2. 2.
    Aldrich, F.K., Sheppard, L.: Tactile graphics in school education: perspectives from pupils. British Journal of Visual Impairment 19(2), 69–73 (2001)CrossRefGoogle Scholar
  3. 3.
    Rassmus-Gröhn, K., Magnusson, C., Eftring, H.: User evaluations of a virtual haptic-audio line drawing prototype. In: Proc. Workshop on Haptic and Audio Interaction Design (2006)Google Scholar
  4. 4.
    Vidal-Verdú, F., Hafez, M.: Graphical tactile displays for visually-impaired people. IEEE Trans. Neural Syst. Rehabil. Eng. 15(1), 119–130 (2007)CrossRefGoogle Scholar
  5. 5.
    Watanabe, T., Kobayashi, M., Ono, S., Yokoyama, K.: Practical use of interactive tactile graphic display system at a school for the blind. In: Proc. Fourth International Conference on Multimedia and Information and Communication Technologies in Education (m-ICTE), pp. 1111–1115 (2006)Google Scholar
  6. 6.
    Jansson, G., Juhasz, I., Cammilton, A.: Reading virtual maps with a haptic mouse: Effects of some modifications of the tactile and audio-tactile information. British Journal of Visual Impairment 24(2), 60–66 (2006)CrossRefGoogle Scholar
  7. 7.
    Wang, Q., Hayward, V.: Compact, portable, modular, high-performance, distributed tactile display device based on lateral skin deformation. In: Proc. Haptics Symposium, pp. 67–72 (2006)Google Scholar
  8. 8.
    Lévesque, V., Hayward, V.: Tactile graphics rendering using three laterotactile drawing primitives. In: Proc. Haptics Symposium, pp. 429–436 (2008)Google Scholar
  9. 9.
    Petit, G., Dufresne, A., Lévesque, V., Hayward, V., Trudeau, N.: Refreshable tactile graphics applied to schoolbook illustrations for students with visual impairment. In: Proc. ACM Conference on Computers and Accessibility (ASSETS), pp. 89–96 (2008)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Vincent Lévesque
    • 1
  • Vincent Hayward
    • 2
  1. 1.Department of Computer ScienceUniversity of British ColumbiaVancouverCanada
  2. 2.Institut des Systèmes Intelligents et de RobotiqueUPMC Univ Paris 06, UMR 7222ParisFrance

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