Search Strategies of Visually Impaired Persons Using a Camera Phone Wayfinding System

Authors:
R. Manduchi;J. Coughlan;V. Ivanchenko
Affiliations:
University of California, Santa Cruz,;Smith-Kettlewell Eye Research Institute, San Francisco,;Smith-Kettlewell Eye Research Institute, San Francisco,
Venue:
ICCHP '08 Proceedings of the 11th international conference on Computers Helping People with Special Needs
Year:
2008

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Abstract

We report new experiments conducted using a camera phone wayfinding system, which is designed to guide a visually impaired user to machine-readable signs (such as barcodes) labeled with special color markers. These experiments specifically investigate search strategies of such users detecting, localizing and touching color markers that have been mounted in various ways in different environments: in a corridor (either flush with the wall or mounted perpendicular to it) or in a large room with obstacles between the user and the markers. The results show that visually impaired users are able to reliably find color markers in all the conditions that we tested, using search strategies that vary depending on the environment in which they are placed.