A wearable guidance system incorporating multiple sensors for visually impaired persons

초록

We propose a wearable system that helps visually impaired persons walk to their destination. Once we choose a destination, our system computes a path and guides us using marker data detected by the camera in buildings. It employs positioning data from GPS receiver outdoors. Simultaneously, it exploits multiple ultrasonic sensors to avoid obstacles lying in the path. In addition, we propose a correction algorithm for GPS data that considers speed to reduce the positioning error and deploy a map- matching algorithm when a user breaks way from the correct path. We evaluate complex structure in front of the user with patterns and determine an avoidance direction by analyzing these patterns. © 2014 Springer-Verlag Berlin Heidelberg.