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• Use of an Indoor Navigation System by Sighted and Blind Travelers: Performance Similarities across Visual Status and Age

  Nicholas A. Giudice, Benjamin A. Guenther, Toni M. Kaplan, Shane M. Anderson, Robert J. Knuesel, Joseph F. Cioffi · 2020 · ACM Transactions on Accessible Computing

  This study evaluates an indoor navigation system using commercial iOS devices and Bluetooth beacons to guide blind and visually impaired (BVI) travelers through complex university buildings. The research compared two navigation conditions: a system-aided mode where participants…

  indoor navigation · blind and low vision · wayfinding · Bluetooth beacons · older adults

• NavCog3 in the Wild: Large-scale Blind Indoor Navigation Assistant with Semantic Features

  Daisuke Sato, Uran Oh, João Guerreiro, Dragan Ahmetovic, Kakuya Naito, Hironobu Takagi, Kris M. Kitani, Chieko Asakawa · 2019 · ACM Transactions on Accessible Computing (TACCESS)

  This paper presents NavCog3, a smartphone-based indoor navigation assistant for people with visual impairments that combines high-accuracy Bluetooth beacon localization with rich semantic environmental features. The system uses off-the-shelf BLE beacons installed in the…

  indoor navigation · visual impairment · blindness · Bluetooth beacons · localization

• How Context and User Behavior Affect Indoor Navigation Assistance for Blind People

  João Guerreiro, Eshed Ohn-Bar, Dragan Ahmetovic, Kris Kitani, Chieko Asakawa · 2018 · Proceedings of the 15th International Web for All Conference (W4A 2018)

  This short paper presents a fine-grained thematic analysis of user behaviour during indoor assisted navigation to understand when and why navigation errors occur even when the underlying localisation system is accurate. The research uses NavCog, a smartphone-based indoor…

  indoor navigation · blind · orientation and mobility · guide dog · white cane

• Turn Right: Analysis of Rotation Errors in Turn-by-Turn Navigation for Individuals with Visual Impairments

  Dragan Ahmetovic, Uran Oh, Sergio Mascetti, Chieko Asakawa · 2018 · Proceedings of the 20th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '18)

  This paper examines a frequently overlooked problem in navigation assistance for blind and visually impaired (BVI) people: how accurately users execute rotation instructions during turn-by-turn guidance. While much research has focused on improving localization accuracy (knowing…

  navigation · blindness · orientation and mobility · indoor navigation · assistive technology

• Crowdsourcing the Installation and Maintenance of Indoor Localization Infrastructure to Support Blind Navigation

  Cole Gleason, Dragan Ahmetovic, Saiph Savage, Carlos Toxtli, Carl Posthuma, Chieko Asakawa, Kris M. Kitani, Jeffrey P. Bigham · 2018 · Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT)

  This paper introduces LuzDeploy, a physical crowdsourcing system that coordinates non-expert volunteers to install and maintain Bluetooth Low Energy (BLE) beacon infrastructure for indoor navigation systems used by blind people. The central problem is that indoor navigation…

  indoor navigation · crowdsourcing · Bluetooth beacons · blind users · wayfinding

• Crowdsourcing the Installation and Maintenance of Indoor Navigation Infrastructure

  Cole Gleason · 2017 · Proceedings of the 19th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '17)

  This student research competition paper presents LuzDeploy, a system designed to solve a major barrier to the adoption of indoor navigation systems for people with visual impairments: the high cost and expertise required to install and maintain the necessary infrastructure.…

  indoor navigation · crowdsourcing · Bluetooth beacons · blindness · wayfinding

• NavCog3: An Evaluation of a Smartphone-Based Blind Indoor Navigation Assistant with Semantic Features in a Large-Scale Environment

  Daisuke Sato, Uran Oh, Kakuya Naito, Hironobu Takagi, Kris Kitani, Chieko Asakawa · 2017 · Proceedings of the 19th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '17)

  This paper presents NavCog3, a smartphone-based indoor navigation assistant for people with visual impairments, evaluated at scale in a 21,000 m² shopping mall in Japan. Unlike many prior indoor navigation prototypes that were tested only in constrained lab environments, NavCog3…

  indoor navigation · blindness · visual impairment · wayfinding · Bluetooth beacons

• NavCog: Turn-by-Turn Smartphone Navigation Assistant for People with Visual Impairments or Blindness

  Dragan Ahmetovic, Cole Gleason, Kris M. Kitani, Hironobu Takagi, Chieko Asakawa · 2016 · Proceedings of the 13th International Web for All Conference (W4A)

  This extended abstract presents NavCog, an open-source iOS smartphone navigation system designed to assist people with visual impairments or blindness in navigating complex indoor and outdoor environments. While many blind people can independently traverse familiar routes by…

  indoor navigation · visual impairment · blindness · assistive technology · Bluetooth beacons

• CATPro: context-aware task prompting system with multiple modalities for individuals with cognitive impairments

  Wan Chih Chang · 2008 · Proceedings of the 10th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '08)

  This short paper presents CATPro (Context-Aware Task Prompting), a system designed to help individuals with cognitive impairments perform daily living and workplace tasks more independently. The system targets people with a range of conditions including traumatic brain injury,…

  cognitive disability · task prompting · context awareness · supported employment · ubiquitous computing

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