國立虎尾科技大學 |

Robust Path Back-Tracing Guidance System for Blind People.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Robust Path Back-Tracing Guidance System for Blind People./
Author:	Flores, German H.
Description:	1 online resource (131 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.
Subject:	Computer engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9780355333749

Robust Path Back-Tracing Guidance System for Blind People.
Flores, German H.

Robust Path Back-Tracing Guidance System for Blind People. - 1 online resource (131 pages)

Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.

Thesis (Ph.D.)--University of California, Santa Cruz, 2017.

Includes bibliographical references

Indoor positioning and navigation is an active area of research due to the widespread use of devices equipped with micro-machined electromechanical systems (MEMS) sensors such as gyroscopes, accelerometers, and magnetometers. The MEMS inertial sensors and other popular technologies can provide information to determine the position and orientation of a person relative to a known initial location. A system that is able to produce accurate location data may find multiple applications in location-based services (LBS), safe wayfinding, and other related fields. For instance, a guidance system could be used to provide travel-related information to passengers as they use public transportation, or provide safe navigational directions to people who find themselves in unfamiliar environments. The research presented in this dissertation focuses on building robust systems that provide real-time and reliable travel-related information to help blind or visually impaired travelers reach a destination safely.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355333749Subjects--Topical Terms:

569006
Computer engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Robust Path Back-Tracing Guidance System for Blind People.
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500 $a Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.
500 $a Adviser: Roberto Manduchi.
502 $a Thesis (Ph.D.)--University of California, Santa Cruz, 2017.
504 $a Includes bibliographical references
520 $a Indoor positioning and navigation is an active area of research due to the widespread use of devices equipped with micro-machined electromechanical systems (MEMS) sensors such as gyroscopes, accelerometers, and magnetometers. The MEMS inertial sensors and other popular technologies can provide information to determine the position and orientation of a person relative to a known initial location. A system that is able to produce accurate location data may find multiple applications in location-based services (LBS), safe wayfinding, and other related fields. For instance, a guidance system could be used to provide travel-related information to passengers as they use public transportation, or provide safe navigational directions to people who find themselves in unfamiliar environments. The research presented in this dissertation focuses on building robust systems that provide real-time and reliable travel-related information to help blind or visually impaired travelers reach a destination safely.
520 $a In this dissertation, I present two novel navigation systems and an openly accessible and annotated data set of inertial sensor time series data collected from blind people. The first system conveys travel-related information to blind passengers when using public transportation. The system makes use of pre-configured Wi-Fi access points placed in public transit vehicles and at bus stops to convey real-time, multi-modal travel-related information to any passenger, directly on his or her own smart device. The second more complex system helps blind people retrace the path taken inside a building and walk safely back to an initial location. This is ideal for situations in which a blind person is able to reach a certain location, for example with the assistance of a sighted guide, and needs to find his or her way back to the initial location. This robust path back-tracing guidance system is comprised of a turn detector based on a hidden Markov model (HMM) to robustly detect turns even in the presence of drift in the inertial measurements and noticeable body sway during gait, a step counter that uses filtered inertial sensor data to determine the number of steps walked along a path, and a path matching algorithm to track the user's location. The step counter and turn detection models were trained on sensor data from WeAllWalk, an openly accessible and annotated data set of inertial sensor time series data created from blind walkers using a long cane or a guide dog. This system runs on a smart device and provides the guidance necessary to help a blind person retrace a path. A robust guidance system that supports safe blind wayfinding opens the doors to many blind travelers who would like to travel and move independently as they explore unfamiliar environments.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Computer engineering. $3 569006
650 4 $a Biomedical engineering. $3 588770
655 7 $a Electronic books. $2 local $3 554714
690 $a 0464
690 $a 0541
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of California, Santa Cruz. $b Computer Engineering. $3 1180336
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10622860 $z click for full text (PQDT)