Computer-Based System for Simulating Visual Impairments

Velázquez, Ramiro; Varona, Jorge; Rodrigo, Pedro M.

doi:10.1080/03772063.2016.1204253

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Table I presents their description. The age range of the participants is from 22 to 54 years old with an average of 34.5, and a standard deviation equal to 12.58; their vision level is determined according to [43]. An informed consent was read to the participants before the experiment.…”

Section: A Study Participants and Experimental Setupmentioning

confidence: 99%

An Outdoor Navigation Assistance System for Visually Impaired People in Public Transportation

et al. 2021

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Visually impaired and blind people (VIBP) have to face significant difficulties on trying to locate public transport vehicles and bus stops due to their vision restrictions. Over the past decade, diverse assistance systems have been developed to solve this problem. However, most of them are based upon the global positioning system (GPS) and present satellite coverage problems in indoor environments. Some others are wearable prototypes that turn out to be onerous for the user. This paper presents an assistance system for VIBP in the use of public transportation. The proposed system uses Bluetooth Low Energy (BLE) technology for location and communication purposes and a developed mobile application for user-smartphone interaction. The BLE beacons are installed on buses and their stops; accordingly, the mobile application tracks them in real-time and provides the relevant information to the user by means of verbal instructions; transportation line, destination, next stop name, and current location. This information allows the user to properly select the desired bus in advance and get off at the correct destination stop. The proposed system has been tested within two different scenarios; (1) under controlled conditions and (2) in a real environment. The results show that the proposed system is 97.6% effective when VIBP travel from one point to another independently. In addition, according to an assessment sheet completed by the participants, the proposed system grants them greater confidence and independence than GPS-based systems because of the following reasons; firstly, it can work with internet connection or without internet connection. Secondly, it is not an onerous system; information about the location of vehicles and stops is provided in real-time. Last but not least, it does not present satellite coverage problems in indoor environments. INDEX TERMSAssistive technology, visually impaired people, blind passenger, mobile application, public transport, bluetooth low energy technology I. SALVADOR MARTÍNEZ-CRUZ received the degree in Electromechanical Engineering and the M.Sc. degree in Mechatronics from the Faculty of Engineering, University Autonomous of Queretaro, Mexico, in 2016 and 2019, respectively. He is currently working towards the Ph.D. degree at the Autonomous University of Queretaro with the department of Mechatronics, Mexico. His research interests are in the fields of image processing, signal processing, and mechatronics. LUIS A. MORALES-HERNÁNDEZ received the degree in electromechanical engineering, the M.Sc. degree in instrumentation and automatic control, and the Ph.D. degree in engineering from the Faculty of Engineering, University Autonomous of Queretaro, Mexico, in 2004, 2005, and 2009, respectively. He is currently a Head Professor with the Faculty of Engineering, Autonomous University of Queretaro, where he holds electromechanical engineering and mechatronics master's and doctoral positions, respectively. He is involved in some governmental projects and technology transfer contracts to in...

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Section: A Study Participants and Experimental Setupmentioning

confidence: 99%

An Outdoor Navigation Assistance System for Visually Impaired People in Public Transportation

et al. 2021

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“…The younger subject (subject A) was congenitally blind, while the older (subject B) developed retinitis pigmentosa in early infancy. Due to the severe loss of vision [46], subject B is considered legally blind. None of them reported any known impairment in tactile sensory or cognitive functions.…”

Section: Study Participants and Experimental Proceduresmentioning

confidence: 99%

An Outdoor Navigation System for Blind Pedestrians Using GPS and Tactile-Foot Feedback

et al. 2018

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This paper presents a novel, wearable navigation system for visually impaired and blind pedestrians that combines a global positioning system (GPS) for user outdoor localization and tactile-foot stimulation for information presentation. Real-time GPS data provided by a smartphone are processed by dedicated navigation software to determine the directions to a destination. Navigational directions are then encoded as vibrations and conveyed to the user via a tactile display that inserts into the shoe. The experimental results showed that users were capable of recognizing with high accuracy the tactile feedback provided to their feet. The preliminary tests conducted in outdoor locations involved two blind users who were guided along 380-420 m predetermined pathways, while sharing the space with other pedestrians and facing typical urban obstacles. The subjects successfully reached the target destinations. The results suggest that the proposed system enhances independent, safe navigation of blind pedestrians and show the potential of tactile-foot stimulation in assistive devices.

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An Astute Assistive Device for Mobility and Object Recognition for Visually Impaired People

Meshram¹,

Patil²,

Shu

2019

IEEE Trans. Human-Mach. Syst.

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Computer-Based System for Simulating Visual Impairments

Cited by 3 publications

References 12 publications

An Outdoor Navigation Assistance System for Visually Impaired People in Public Transportation

An Outdoor Navigation Assistance System for Visually Impaired People in Public Transportation

An Outdoor Navigation System for Blind Pedestrians Using GPS and Tactile-Foot Feedback

An Astute Assistive Device for Mobility and Object Recognition for Visually Impaired People

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