Audio Guide for Visually Impaired People Based on Combination of Stereo Vision and Musical Tones

Audio Guide for Visually Impaired People Based on Combination of Stereo Vision and Musical Tones

Indoor navigation systems offer many application possibilities for people who need information about the scenery and the possible fixed and mobile obstacles placed along the paths. In these systems, the main factors considered for their construction and evaluation are the level of accuracy and the d...

Full description

Saved in:
Bibliographic Details
Published in:Sensors (Basel, Switzerland) Vol. 20; no. 1; p. 151
Main Authors: Simões, Walter C S S, Silva, Yuri M L R, Pio, José Luiz de S, Jazdi, Nasser, F de Lucena, Jr, Vicente
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 25-12-2019
MDPI
Subjects:
Accuracy
Algorithms
Barriers
Cameras
data fusion
Dead reckoning
Error correction
Global positioning systems
GPS
Ground level
Hypotheses
indoor positioning
kalman filter
landmarks
Linear filters
Navigation systems
particle filter
People with disabilities
Sensors
Vision
Visual impairment
Visual perception
data fusion
indoor positioning
landmarks
particle filter
Kalman filter
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Indoor navigation systems offer many application possibilities for people who need information about the scenery and the possible fixed and mobile obstacles placed along the paths. In these systems, the main factors considered for their construction and evaluation are the level of accuracy and the delivery time of the information. However, it is necessary to notice obstacles placed above the user's waistline to avoid accidents and collisions. In this paper, different methodologies are associated to define a hybrid navigation model called iterative pedestrian dead reckoning (i-PDR). i-PDR combines the PDR algorithm with a Kalman linear filter to correct the location, reducing the system's margin of error iteratively. Obstacle perception was addressed through the use of stereo vision combined with a musical sounding scheme and spoken instructions that covered an angle of 120 degrees in front of the user. The results obtained in the margin of error and the maximum processing time are 0.70 m and 0.09 s, respectively, with obstacles at ground level and suspended with an accuracy equivalent to 90%.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1424-8220
1424-8220
DOI:10.3390/s20010151