Journal
SENSORS
Volume 16, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/s16010095
Keywords
blind; virtual cane; inertial sensor; assisting system; Kalman filter
Funding
- National Research Foundation of Korea - Korean Government [2011-001978]
- National Research Foundation of Korea [2011-0021978] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A virtual blind cane system for indoor application, including a camera, a line laser and an inertial measurement unit (IMU), is proposed in this paper. Working as a blind cane, the proposed system helps a blind person find the type of obstacle and the distance to it. The distance from the user to the obstacle is estimated by extracting the laser coordinate points on the obstacle, as well as tracking the system pointing angle. The paper provides a simple method to classify the obstacle's type by analyzing the laser intersection histogram. Real experimental results are presented to show the validity and accuracy of the proposed system.
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