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An optical data transmission system for blind persons by means of a mobile phone with the Android operating system
Author(s) -
Łutkowski A.,
Skulimowski P.,
Poryzała P.
Publication year - 2014
Publication title -
international journal of adaptive control and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 66
eISSN - 1099-1115
pISSN - 0890-6327
DOI - 10.1002/acs.2514
Subject(s) - barcode , android (operating system) , software , mobile phone , phone , computer science , data transmission , mobile device , embedded system , computer hardware , real time computing , engineering , telecommunications , operating system , philosophy , linguistics
SUMMARY The paper describes an optical data transmission system supporting blind and partially sighted persons in an indoor navigation, mainly in identification of offices in public buildings. Two‐dimensional data matrix barcodes (ISO/IEC 16022) are sequentially displayed on a small LED matrix mounted on a wall in a close proximity to all potential points of interest. The user must be equipped with an Android mobile device with a pre‐installed software, which locates and processes barcode sequences recorded by a camera. Sequences are decoded as plain text English messages and read by an additional text‐to‐speech software installed on the mobile device. To evaluate its performance, the system was implemented and tested at the Lodz University of Technology. Copyright © 2014 John Wiley & Sons, Ltd.