Crosswatch: A Camera Phone System for Orienting Visually Impaired Pedestrians at Traffic Intersections

Urban intersections are the most dangerous parts of a blind or visually impaired person’s travel. To address this problem, this paper describes the novel “Crosswatch” system, which uses computer vision to provide information about the location and orientation of crosswalks to a blind or visually imp...

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Bibliographic Details
Published inComputers Helping People with Special Needs Vol. 5105; pp. 1122 - 1128
Main Authors Ivanchenko, Volodymyr, Coughlan, James, Shen, Huiying
Format Book Chapter Journal Article
LanguageEnglish
Published Germany Springer Berlin / Heidelberg 01.01.2008
Springer Berlin Heidelberg
SeriesLecture Notes in Computer Science
Subjects
Audio Feedback
Blind Subject
Camera Phone
Cell Phone
Urban Intersection
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ISBN9783540705390
3540705392
ISSN0302-9743
1611-3349
DOI10.1007/978-3-540-70540-6_168

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Summary:Urban intersections are the most dangerous parts of a blind or visually impaired person’s travel. To address this problem, this paper describes the novel “Crosswatch” system, which uses computer vision to provide information about the location and orientation of crosswalks to a blind or visually impaired pedestrian holding a camera cell phone. A prototype of the system runs on an off-the-shelf Nokia camera phone in real time, which automatically takes a few images per second, uses the cell phone’s built-in computer to analyze each image in a fraction of a second and sounds an audio tone when it detects a crosswalk. Tests with blind subjects demonstrate the feasibility of the system and its ability to provide useful crosswalk alignment information under real-world conditions.
ISBN:9783540705390
3540705392
ISSN:0302-9743
1611-3349
DOI:10.1007/978-3-540-70540-6_168