A proof-of-the-concept study on GuideTorch, an assistive device for the visually impaired
International Journal of Intelligent Systems Technologies and Applications
A 3D pose estimator for the visually impaired
IROS'09 Proceedings of the 2009 IEEE/RSJ international conference on Intelligent robots and systems
Design and Analysis of a Portable Indoor Localization Aid for the Visually Impaired
International Journal of Robotics Research
(Computer) vision without sight
Communications of the ACM
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Integrated online localization and navigation for people with visual impairments using smart phones
ACM Transactions on Interactive Intelligent Systems (TiiS)
GIST: a gestural interface for remote nonvisual spatial perception
Proceedings of the 26th annual ACM symposium on User interface software and technology
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The virtual white cane is a range sensing device based on active triangulation, that can measure distances at a rate of 15 measurements/second. A blind person can use this device for sensing the environment, pointing it as if it was a flashlight. Beside measuring distances, this device can detect surface discontinuities, such as the foot of a wall, a step, or a drop-off. This is obtained by analyzing the range data collected as the user swings the device around, tracking planar patches and finding discontinuities. In this paper we briefly describe the range sensing device, and present an online surface tracking algorithm, based on a Jump-Markov model. We show experimental results proving the robustness of the tracking system in real-world conditions.