Technologies and Systems to Improve Mobility of Visually Impaired People: A State of the Art

Paiva, Sara; Gupta, Nishu

doi:10.1007/978-3-030-16450-8_5

Cited by 16 publications

(15 citation statements)

References 26 publications

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“…This paper illustrates a case study carried out in the city of Viana do Castelo, in Portugal, in partnership with the City Council and which represents a continuation of previous work carried out in the field of mobility [5]. The main goal is to improve accessibility in the city for various people with reduced mobility (including visually impaired people [6], autistic people, deaf people, people in wheelchairs, elderly and pregnant people or people with children) in order to recommend them the optimal and most suitable route from their current location to an intended destination. The system is based on a Geographic Information System (GIS) that has an annotation of the various streets of the historic center of the city with regard to their suitability for each segment.…”

Section: Introductionmentioning

confidence: 91%

“…• Add all the scores for the odd numbered questions (1,3,5,7,9) together and subtract 5 from this: • Add all the scores for the even numbered questions together (2,4,6,8,10) and subtract this number from 25: • Add the scores calculated in steps 1 and 2 together and multiply by 2.5: • Round the number calculated in step 3 to nearest whole number to get the final SUS score.…”

Section: A Algorithms Comparisonmentioning

confidence: 99%

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Optimized Routing for People with Permanent or Temporary Mobility Disability: a Case Study in Viana do Castelo

Verde

Silva

Pereira

et al. 2021

2021 IEEE International Smart Cities Conference (ISC2)

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Nowadays, it is already common to have apps to assist citizens in their mobility within a city. However, apps are usually designed for the general citizen and do not include the specificity of people with reduced mobility, temporarily or permanently, such as visually impaired people, autistic people, people in wheelchairs, among others segments. This paper illustrates a case study carried out in the city of Viana do Castelo, in Portugal, where the streets of the historic center of the city were classified in a Geographic Information System (G IS) by the City Council together with the institutions that represent each one of the considered segments. Based on this classification, the Viana+Acessfvel app was developed, which is about to be made available free of charge to all citizens, and which recommends to each user the optimum route from a source to a destination, taking into account his segment. For example, visually impaired people should avoid streets where emergency vehicles can circulate and autistic people should preferably avoid streets with loud noises, among other conditions. The A-Star Algorithm and Dijkstra Algorithm were used in the app to identify the optimum route. A comparative study was made concluding that both strategies identify the optimum route and A-Star method obtains the optimum solution in a faster time. An evaluation of the app was also made in terms of its effectiveness and usability.

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Section: Introductionmentioning

confidence: 91%

Section: A Algorithms Comparisonmentioning

confidence: 99%

Optimized Routing for People with Permanent or Temporary Mobility Disability: a Case Study in Viana do Castelo

Verde

Silva

Pereira

et al. 2021

2021 IEEE International Smart Cities Conference (ISC2)

Self Cite

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“…Their review, however, did not study in detail the algorithms and datasets and did not attempt to present a comparison between systems. Paiva and Gupta [ 11 ] explored indoor and outdoor navigation systems and obstacle detection systems. They identified approaches and equipment used in each one.…”

Section: Related Workmentioning

confidence: 99%

A Systematic Review of Urban Navigation Systems for Visually Impaired People

El-taher

Taha

Courtney

et al. 2021

Sensors

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Blind and Visually impaired people (BVIP) face a range of practical difficulties when undertaking outdoor journeys as pedestrians. Over the past decade, a variety of assistive devices have been researched and developed to help BVIP navigate more safely and independently. In addition, research in overlapping domains are addressing the problem of automatic environment interpretation using computer vision and machine learning, particularly deep learning, approaches. Our aim in this article is to present a comprehensive review of research directly in, or relevant to, assistive outdoor navigation for BVIP. We breakdown the navigation area into a series of navigation phases and tasks. We then use this structure for our systematic review of research, analysing articles, methods, datasets and current limitations by task. We also provide an overview of commercial and non-commercial navigation applications targeted at BVIP. Our review contributes to the body of knowledge by providing a comprehensive, structured analysis of work in the domain, including the state of the art, and guidance on future directions. It will support both researchers and other stakeholders in the domain to establish an informed view of research progress.

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“…While some authors choose to set their main focus on reviewing various solutions addressing the components of navigation process (for instance, obstacle detection and avoidance [11,12]), the others take a more holistic approach and assess the pros and cons of assistive technology for navigating in unknown surroundings [13,14]. Solutions tailored to function in very restrictive settings, tests lacking robustness, and the limited involvement of end users were emphasized as major limitations of the existing ETA research initiatives [11,12]. A tradeoff between the accuracy and costs of developing and deploying an indoor navigation solution was highlighted as a limiting factor after a thorough review of various technologies.…”

Section: Introductionmentioning

confidence: 99%

“…Wi-Fi was pointed out as the most economically feasible alternative as long as the users can tolerate lower accuracy [15]. The aforementioned reviews provide indications for general research directions in the field; however, these trends are often limited to the insights and assumptions made by the academics and often underestimate the feedback and needs of end users [11,12].…”

Section: Introductionmentioning

confidence: 99%

Indoor Navigation Systems for Visually Impaired Persons: Mapping the Features of Existing Technologies to User Needs

Plikynas

Žvironas

Budrionis

et al. 2020

Sensors

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Currently, several outdoor navigation and orientation electronic traveling aid (ETA) solutions for visually impaired (VI) people are commercially available or in active development. This paper’s survey of blind experts has shown that after outdoor navigation, the second most important ETA feature for VI persons is indoor navigation and orientation (in public institutions, supermarkets, office buildings, homes, etc.). VI persons need ETA for orientation and navigation in unfamiliar indoor environments with embedded features for the detection and recognition of obstacles (not only on the ground but also at head level) and desired destinations such as rooms, staircases, and elevators. The development of such indoor navigation systems, which do not have Global Positioning System (GPS) locational references, is challenging and requires an overview and evaluation of existing systems with different navigation technologies. This paper presents an evaluation and comparison of state-of-the-art indoor navigation solutions, and the research implications provide a summary of the critical observations, some insights, and directions for further developments. The paper maps VI needs in relation to research and development (R&D) trends using the evaluation criteria deemed most important by blind experts.

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Technologies and Systems to Improve Mobility of Visually Impaired People: A State of the Art

Cited by 16 publications

References 26 publications

Optimized Routing for People with Permanent or Temporary Mobility Disability: a Case Study in Viana do Castelo

Optimized Routing for People with Permanent or Temporary Mobility Disability: a Case Study in Viana do Castelo

A Systematic Review of Urban Navigation Systems for Visually Impaired People

Indoor Navigation Systems for Visually Impaired Persons: Mapping the Features of Existing Technologies to User Needs

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