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• Deep Learning Compensation of Rotation Errors During Navigation Assistance for People with Visual Impairments or Blindness

  Dragan Ahmetovic, Sergio Mascetti, Cristian Bernareggi, João Guerreiro, Uran Oh, Chieko Asakawa · 2019 · ACM Transactions on Accessible Computing (TACCESS)

  This paper addresses a critical but often overlooked problem in turn-by-turn navigation assistance for people with visual impairments or blindness (VIB): rotation errors at turning points. While much navigation research focuses on improving localization accuracy, this work…

  navigation assistance · visual impairment · blindness · deep learning · turn-by-turn navigation

• 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

• Multimodal Exploration of Mathematical Function Graphs with AudioFunctions.web

  Dragan Ahmetovic, Niccolò Cantù, Cristian Bernareggi, João Guerreiro, Sergio Mascetti, Anna Capietto · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This demonstration paper presents AudioFunctions.web, a web-based system designed to make mathematical function graphs accessible to people who are blind or have visual impairments. Function graphs are a fundamental tool in mathematics education and STEM fields, yet they remain…

  sonification · mathematics accessibility · visual impairment · blindness · STEM accessibility

• AudioFunctions.web: Multimodal Exploration of Mathematical Function Graphs

  Dragan Ahmetovic, Cristian Bernareggi, João Guerreiro, Sergio Mascetti, Anna Capietto · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This full research paper presents AudioFunctions.web, a web application that enables blind and visually impaired people to explore mathematical function graphs through a combination of sonification, earcons, and speech synthesis. The system is the platform-independent successor…

  sonification · mathematics accessibility · visual impairment · blindness · STEM accessibility

• Exploring feasibility of wrist gestures for non-visual interactions with wearables

  Shirin Feiz, I. V. Ramakrishnan · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This paper investigates the accessibility of wrist gestures as an input modality for people with visual impairments (PVIs) interacting with smartwatches. Smartwatches hold particular promise for PVIs: they are always available, enable one-handed use (important when the other…

  wearable technology · smartwatch · gesture-based interaction · visual impairment · blindness

• Blind Web Development Training at Oysters and Pearls Technology Camp in Uganda

  Claire Ferrari, Amy Hurst, Scott Fitzgerald · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This paper describes the development and delivery of a 7-day web development course for 13 blind and low-vision students (ages 18-35, average 24) at the Oysters and Pearls Technology Camp in Gulu, northern Uganda. None of the students had prior experience building websites,…

  STEM accessibility · blindness · low vision · web development · coding education

• Write-it-Yourself: Empowering Blind People to Independently Fill-out Paper Forms

  Syed Masum Billah, Shirin Feiz, Vikas Ashok, Roy Shilkrot, I. V. Ramakrishnan · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This demonstration paper introduces WiYG (Write-it-Yourself Guide), a system that enables blind people to independently fill out printed paper forms such as bank checks, consent forms, and restaurant receipts — a task that has until now been impossible without sighted…

  blindness · assistive technology · computer vision · 3D printing · writing assistance

• Feel-It: Personalized Audio-Tactile Web Browsing

  Anatoliy Borodin, Yevgen Borodin, Andrii Soviak, Vikas Ashok, Shirin Disfani, I. V. Ramakrishnan · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This demonstration paper presents Feel-It, a hardware-software system for audio-tactile web browsing that enables blind users to explore the two-dimensional spatial layout of web pages through touch. The core problem addressed is that screen readers reduce web pages to a…

  blindness · haptic feedback · tactile display · web browsing · screen reader

• GuideCall: Affordable and Trustworthy Video Call-Based Remote Assistance for People with Visual Impairments

  Naveen M. Ravindran, Seyed Ali Cheraghi, Vinod Namboodiri, Rakesh Babu · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This demonstration paper presents GuideCall, a free Android application that enables blind or visually impaired (BVI) individuals to get remote visual assistance through video calls with trusted personal contacts. The system addresses two key limitations of existing remote…

  visual impairment · blindness · remote assistance · video calling · assistive technology

• Web Development Training for Students That Are Blind

  Claire Ferrari · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This doctoral consortium paper outlines a mixed-methods dissertation research plan for developing and evaluating a 10-day web development course specifically designed for students who are blind or have low vision. The author contextualizes the work within the employment…

  STEM accessibility · blindness · low vision · web development · coding education

• Synesthesia Vision integration with Recife's Public Transport

  Aida A. Ferreira, Gilmar Brito, Lydia Nascimento da Silva, João Victor Mouzinho, Ryan Morais, Jonathan Romualdo Pereira · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This demonstration paper presents Synesthesia Vision, a two-component assistive technology system for blind people in Recife, Brazil, and its integration with the metropolitan public transport monitoring system. The system consists of sensory glasses (3D-printed frames…

  visual impairment · blindness · public transportation · smart city · obstacle detection

• An Independent and Interactive Museum Experience for Blind People

  Saki Asakawa, João Guerreiro, Daisuke Sato, Hironobu Takagi, Dragan Ahmetovic, Desi Gonzalez, Kris M. Kitani, Chieko Asakawa · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This paper presents a prototype system for supporting independent, interactive museum visits by blind people, deployed and evaluated at The Andy Warhol Museum in Pittsburgh. The system combines indoor navigation with context-aware art appreciation through continuous tracking of…

  museum accessibility · blindness · indoor navigation · BLE beacon · audio description

• Demonstration of GestureCalc: An Eyes-Free Calculator for Touch Screens

  Leah Perlmutter, Bindita Chaudhuri, Justin Petelka, Philip Garrison, James Fogarty, Jacob O. Wobbrock, Richard E. Ladner · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS)

  This demonstration paper presents GestureCalc, an eyes-free, target-less digital calculator for touch screen devices that replaces traditional button-based input with intuitive gesture-based input. The core problem is that existing calculator apps require precise tapping on…

  gesture-based interaction · touchscreen accessibility · blindness · visual impairment · screen reader

• Typing Slowly but Screen-Free: Exploring Navigation over Entirely Auditory Keyboards

  Reeti Mathur, Aishwarya Sheth, Parimal Vyas, Davide Bolchini · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS)

  This paper introduces the concept of "keyflows" — entirely auditory keyboards that operate without a reference screen, enabling blind users to type while untethered from their mobile device. The core problem is that current accessible keyboards require blind users to constantly…

  text entry · blindness · visual impairment · screen reader · auditory interface

• GestureCalc: An Eyes-Free Calculator for Touch Screens

  Bindita Chaudhuri, Leah Perlmutter, Justin Petelka, Philip Garrison, James Fogarty, Jacob O. Wobbrock, Richard E. Ladner · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS)

  This full research paper presents GestureCalc, an eyes-free, target-less gesture-based calculator for touch screens, along with a rigorous three-session longitudinal evaluation with eight screen reader users. The system replaces the spatial button layout of conventional…

  gesture-based interaction · touchscreen accessibility · blindness · visual impairment · screen reader

• A Wearable Input Mechanism for Blind Users of Computers Based on Mental Mapping of Thumb-To-Phalanx Distances

  Yash Naik · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This student research abstract presents Mentalitype, a glove-based wearable keyboard designed to provide blind users with an affordable and portable text input mechanism for computer-based tasks. The system maps 32 push-buttons to the phalanges (finger bones) of both hands, with…

  blindness · wearable technology · text input · assistive technology · alternative keyboards

• Jido: A Conversational Tactile Map for Blind People

  Luis Cavazos Quero, Jorge Iranzo Bartolomé, Dongmyeong Lee, Yerin Lee, Sangwon Lee, Jundong Cho · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This demonstration paper presents Jido, a system that combines a touch-sensitive tactile map with a voice-based conversational agent to help blind people understand and navigate indoor environments. The tactile map is constructed from laser-cut acrylic sheets mounted on a case…

  blindness · tactile maps · voice interaction · indoor navigation · conversational interface

• Go That Way: Exploring Supplementary Physical Movements by a Stationary Robot When Providing Navigation Instructions

  Xiang Zhi Tan, Elizabeth J. Carter, Samantha Reig, Aaron Steinfeld · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This paper explores how stationary kiosk-type robots might provide navigation instructions to blind people by supplementing verbal directions with physical movements. The work is inspired by a technique used by Orientation and Mobility (O&M) experts called Palm Drawing, in which…

  blindness · human-robot interaction · navigation · haptic feedback · orientation and mobility

• The Design Space of Nonvisual Word Completion

  Hugo Nicolau, Andre Rodrigues, Andre Santos, Tiago Guerreiro, Kyle Montague, Joao Guerreiro · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This paper presents the first design space for nonvisual word completion on mobile devices, addressing a gap where word completion interfaces — ubiquitous in sighted mobile typing — remain poorly designed for screen reader users. While sighted users can glance at three…

  blindness · text entry · mobile accessibility · screen readers · word prediction

• Closing the Gap: Designing for the Last-Few-Meters Wayfinding Problem for People with Visual Impairments

  Manaswi Saha, Alexander J. Fiannaca, Melanie Kneisel, Edward Cutrell, Meredith Ringel Morris · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This paper comprehensively investigates the last-few-meters wayfinding problem — the gap between where GPS navigation ends (within approximately 5 meters of a destination) and where a person with visual impairment actually needs to arrive (the specific door, entrance, or…

  blindness · wayfinding · navigation · GPS · computer vision

• StateLens: A Reverse Engineering Solution for Making Existing Dynamic Touchscreens Accessible

  Anhong Guo, Junhan Kong, Michael Rivera, Frank F. Xu, Jeffrey P. Bigham · 2019 · ACM Symposium on User Interface Software and Technology

  This paper presents StateLens, a three-part system that makes existing dynamic touchscreen interfaces accessible to blind users without requiring any modification to the touchscreen hardware or software. Blind people routinely encounter inaccessible touchscreens on coffee…

  touchscreen accessibility · blindness · computer vision · crowdsourcing · reverse engineering

• "It's almost like they're trying to hide it": How User-Provided Image Descriptions Have Failed to Make Twitter Accessible

  Cole Gleason, Patrick Carrington, Cameron Cassidy, Meredith Ringel Morris, Kris M. Kitani, Jeffrey P. Bigham · 2019 · The World Wide Web Conference

  This paper presents the first large-scale empirical study of how Twitter's opt-in image description feature (launched in 2016) has affected the accessibility of images on the platform. The researchers analyzed 1.09 million tweets with images collected over five days in June…

  alternative text · social media accessibility · image accessibility · blindness · screen readers

• Airport Accessibility and Navigation Assistance for People with Visual Impairments

  João Guerreiro, Dragan Ahmetovic, Daisuke Sato, Kris Kitani, Chieko Asakawa · 2019 · Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems

  This paper investigates whether a BLE-beacon-based smartphone navigation system can enable visually impaired travelers to move through an airport independently — a setting where they are currently required to rely on airline-provided sighted escorts to reach the gate, and where…

  airport accessibility · blind navigation · indoor navigation · orientation and mobility · visual impairment

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