Universal real-time navigational assistance (URNA): an urban bluetooth beacon for the blind
Proceedings of the 1st ACM SIGMOBILE international workshop on Systems and networking support for healthcare and assisted living environments
Color targets: fiducials to help visually impaired people find their way by camera phone
Journal on Image and Video Processing
iCane: a partner for the visually impaired
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
EYECane: navigating with camera embedded white cane for visually impaired person
Proceedings of the 11th international ACM SIGACCESS conference on Computers and accessibility
Zebralocalizer: identification and localization of pedestrian crossings
Proceedings of the 13th International Conference on Human Computer Interaction with Mobile Devices and Services
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We demonstrate a system designed to assist a visually impaired individual while moving in an unfamiliar environment. Small and economical color markers are placed in key locations, possibly in the vicinity of other signs (bar codes or text). The user can detect these markers by means of a cell phone equipped with a camera. Our demonstration highlights a number of novel features, including: improved acoustic interfaces; estimation of the distance to the marker, which is communicated to the user via text-to-speech (TTS); increased robustness via rotation invariance, which makes the system easier to use for users with reduced dexterity.