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A mobile phone system to find crosswalks for visually impaired pedestrians.

Urban intersections are the most dangerous parts of a blind or visually impaired pedestrian's travel. A prerequisite for safely crossing an intersection is entering the crosswalk in the right direction and avoiding the danger of straying outside the crosswalk. This paper presents a proof of concept...

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Published in:Technology & Disability Vol. 20; no. 3; pp. 217 - 225
Main Authors: Shen H, Chan K, Coughlan J, Brabyn J
Format: pictorial Journal Article
Published: Sage Publications Inc. 2008
Online Access:View this record in EBSCOhost
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      pub: Sage Publications Inc.
      place: Thousand Oaks, California
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        atl: A mobile phone system to find crosswalks for visually impaired pedestrians.
      aug:
        au:
          Shen H
          Chan K
          Coughlan J
          Brabyn J
        affil: Smith-Kettlewell Eye Research Institute, San Francisco, CA
      sug:
        subj:
          Assistive Technology
          Safety
          Vision Disorders
          Walking
          Wireless Communications Utilization
          Algorithms
          Blindness
          Computers and Computerization
          Digital Imaging
          Equipment Design
          Rehabilitation Science
          Sound
          Telephone Equipment and Supplies
      ab: Urban intersections are the most dangerous parts of a blind or visually impaired pedestrian's travel. A prerequisite for safely crossing an intersection is entering the crosswalk in the right direction and avoiding the danger of straying outside the crosswalk. This paper presents a proof of concept system that seeks to provide such alignment information. The system consists of a standard mobile phone with built-in camera that uses computer vision algorithms to detect any crosswalk visible in the camera's field of view; audio feedback from the phone then helps the user align him/herself to it. Our prototype implementation on a Nokia mobile phone runs in about one second per image, and is intended for eventual use in a mobile phone system that will aid blind and visually impaired pedestrians in navigating traffic intersections.
      pubtype: Academic Journal
      doctype:
        pictorial
        Journal Article
      ougenre: Article
    language: English
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