Vibrotactile Spatial Acuity on the Torso: Effects of Location and Timing Parameters
WHC '05 Proceedings of the First Joint Eurohaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems
Pattern Recognition, Third Edition
Pattern Recognition, Third Edition
A Multimodal Interaction Scheme between a Blind User and the Tyflos Assistive Prototype
ICTAI '08 Proceedings of the 2008 20th IEEE International Conference on Tools with Artificial Intelligence - Volume 02
Non-visual 2D representation of obstacles
ACM SIGACCESS Accessibility and Computing
Exploration and avoidance of surrounding obstacles for the visually impaired
Proceedings of the 14th international ACM SIGACCESS conference on Computers and accessibility
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In this paper we present research work towards a 2D tactile vocabulary for training visually impaired for their independent mobility. The vocabulary is associated to a 2D tactile array (vibration array), which is a part of a wearable navigation prototype (Electronic Travel Aid) called Tyflos. The vibration array is currently consisting of 16 vibrating elements arranged in a 4×4 manner. Each motor can be independently driven with square pulses of varying frequencies. The vibration array can represent dynamically the 3D space of the user's field of view: the 2D arrangement represent the x-y coordinates while the frequencies represent the z coordinate (which is the distance of an obstacle from the user). Different navigation and human factor criteria have been used to create the 2D tactile vocabulary. Finally, using the continuous feedback from the users, the goal is to balance between a minimal vocabulary for easy learning and a rich vocabulary that will still be able to represent efficiently the 3D navigation space.