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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

• SafeExit4All: An Inclusive Indoor Emergency Evacuation System for People With Disabilities

  Seyed Ali Cheraghi, Anup Sharma, Vinod Namboodiri, Güler Arsal · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This paper presents SafeExit4All, a smartphone-based emergency evacuation system designed to help people with disabilities independently find safe exits from indoor spaces during emergencies such as fires, tornadoes, and active shooter situations. The authors identify a critical…

  indoor navigation · emergency evacuation · wayfinding · visual impairment · mobility impairment

• 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

• Personalization in the Interactive EPUB 3 Reading Experience: Accessibility Issues for Screen Reader Users

  Barbara Leporini, Clara Meattini · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This paper investigates the accessibility of interactive EPUB 3 digital books when accessed via screen readers. The authors designed and developed a multimedia, interactive EPUB 3 prototype — a digital guide to Sienese cuisine featuring 8 recipe chapters and 8 walking itinerary…

  EPUB · accessible publishing · screen reader · digital books · personalization

• 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

• Pushpak: Voice Command-based eBook Navigator

  Shradha Holani, Akashdeep Bansal, M Balakrishnan · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This demonstration paper presents Pushpak, a voice command-based eBook navigator designed to reduce the steep learning curve associated with screen reader software. The authors identify a key accessibility barrier: effective use of screen readers like NVDA and JAWS requires…

  voice control · screen reader · NVDA · eBook · natural language understanding

• 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

• 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

• Personalized and Accessible TV Interaction for People with Visual Impairments

  Daniel Costa, Carlos Duarte · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This paper presents the design and implementation of a system that makes Connected TV applications accessible to people with visual impairments by using a smartphone as an accessible second-screen controller. Connected TVs and set-top boxes now offer interactive features beyond…

  visual impairment · connected TV · personalization · adaptive interface · multimodal interaction

• It's All About the Message: Visual Experience is a Precursor to Accurate Auditory Interaction

  Simon Harper, Sukru Eraslan, Yeliz Yesilada · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This paper argues that understanding how sighted users visually experience web pages is a necessary precursor to designing effective auditory (screen reader) experiences for visually disabled users. The authors challenge the assumption that the experiences of sighted and blind…

  eye tracking · screen reader · page linearization · experiential transcoding · visual impairment

• Comprehensive Accessibility of Equations by Visually Impaired

  Akashdeep Bansal · 2019 · Proceedings of the 16th International Web for All Conference (W4A)

  This doctoral consortium paper proposes an approach to improving the audio rendering of mathematical equations for people with visual impairments by introducing a complexity metric that adapts how equations are spoken based on their structural complexity and individual user…

  mathematics accessibility · STEM accessibility · visual impairment · screen reader · speech synthesis

• 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

• WordMelodies: Supporting Children with Visual Impairment in Learning Literacy

  Sergio Mascetti, Giovanni Leontini, Cristian Bernareggi, Dragan Ahmetovic · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS)

  This demonstration paper presents WordMelodies, an inclusive cross-platform mobile application designed to support children with visual impairments in acquiring basic literacy skills. The app provides eight different exercises targeting foundational reading and writing…

  visual impairment · children · literacy · education · mobile application

• Revisiting Blind Photography in the Context of Teachable Object Recognizers

  Kyungjun Lee, Jonggi Hong, Simone Pimento, Ebrima Jarjue, Hernisa Kacorri · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS)

  This paper introduces a real-time audio-haptic feedback system to help people with visual impairments frame objects in their smartphone camera when training teachable object recognizers. The challenge is that teachable recognizers — which let users train personalized models to…

  blind photography · teachable object recognizer · computer vision · deep learning · visual impairment

• 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 Tangible Math Game for Visually Impaired Children

  Ana Cristina Pires, Sebastian Marichal, Fernando Gonzalez-Perilli, Ewelina Bakala, Bruno Fleischer, Gustavo Sansone, Tiago Guerreiro · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS)

  This demonstration paper presents iCETA, an inclusive interactive system for math learning that enables visually impaired children to autonomously engage with and solve additive composition tasks (addition and subtraction) through tangible interaction. The system was designed…

  visual impairment · children · mathematics accessibility · tangible user interface · inclusive design

• Insights for More Usable VR for People with Amblyopia

  Ocean Hurd, Sri Kurniawan · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS)

  This poster paper investigates how to make virtual reality experiences more usable for people with amblyopia ("lazy eye"), the world's most common neurological eye disorder affecting approximately 2-3% of the population. The research is motivated by two converging trends: the…

  amblyopia · virtual reality · visual impairment · VR therapy · serious games

• Sidewalk, A Wayfinding Message Syntax for People with a Visual Impairment

  Joey van der Bie, Christina Jaschinski, Somaya Ben Allouch · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This poster paper introduces Sidewalk, a structured wayfinding message syntax designed to improve navigation instructions for people with visual impairments (PVI) using mobile applications. The authors argue that traditional turn-by-turn navigation apps fail PVI because they…

  visual impairment · wayfinding · navigation · natural language · mobile accessibility

• Making the Blockly Library Accessible via Touchscreen

  Logan B. Caraco, Sebastian Deibel, Yufan Ma, Lauren R. Milne · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This demonstration paper presents two prototype designs for making Google's Blockly library — the foundation underlying popular block-based programming environments (BBPEs) like Scratch, MIT App Inventor, and the Code.org curriculum — accessible to users with visual impairments…

  visual impairment · block-based programming · education · screen readers · ARIA

• X-Ray: Screenshot Accessibility via Embedded Metadata

  Sujeath Pareddy, Anhong Guo, Jeffrey P. Bigham · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This paper introduces X-Ray, a system that preserves the accessibility of user interface content when it is captured as a screenshot. Screenshots strip away all semantic information — text structure, element roles, states, labels, and navigation order — leaving only pixels that…

  screen readers · alternative text · screenshots · image accessibility · metadata

• GraVVITAS 2.0: A Framework For Digital Accessible Content Provision

  Cagatay Goncu, Kim Marriott · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This demonstration paper presents GraVVITAS 2.0 (Graphics Viewer using Vibration Interactive Touch and Speech), a framework for making graphical information accessible to people with vision impairments on off-the-shelf mobile devices. The paper argues that while screen readers…

  visual impairment · accessible graphics · tactile graphics · haptic feedback · data visualization

• Disability, ICT and eLearning Platforms: Faculty-Facing Embedded Work Tools in Learning Management Systems

  Sushil K. Oswal · 2019 · Proceedings of the 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2019)

  This paper presents preliminary findings from a longitudinal study of the accessibility of the Canvas learning management system (LMS) for faculty with visual disabilities. What makes this study distinctive is its focus on the faculty-facing interface — nearly all prior research…

  learning management systems · higher education · screen readers · visual impairment · faculty accessibility