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• Automating Tactile Graphics Translation

  Richard E. Ladner, Melody Y. Ivory, Rajesh Rao, Sheryl Burgstahler, Dan Comden, Sangyun Hahn, Matthew Renzelmann, Satria Krisnandi, Mahalakshmi Ramasamy, Beverly Slabosky, Andrew Martin, Amelia Lacenski, Stuart Olsen, Dmitri Groce · 2005 · Proceedings of the 7th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '05)

  This paper addresses the critical shortage of tactile graphics available to blind students in mathematics, science, and engineering (MSE) courses. Postsecondary science textbooks may have images on half their pages — sometimes up to 500 images per book — yet these graphical…

  tactile graphics · braille · STEM accessibility · image processing · machine learning

• Sparsha: A Comprehensive Indian Language Toolset for the Blind

  Anirban Lahiri, Satya Jyoti Chattopadhyay, Anupam Basu · 2005 · Proceedings of the 7th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '05)

  This paper presents Sparsha ("feeling of touch" in Hindi), the first comprehensive toolset enabling over 13 million visually impaired people in the Indian subcontinent to read and write in their native languages using a computer. Existing Braille translation systems and screen…

  braille · visual impairment · Indian languages · multilingual accessibility · screen reader

• Automatic Production of Tactile Graphics from Scalable Vector Graphics

  Stephen E. Krufka, Kenneth E. Barner · 2005 · Proceedings of the 7th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '05)

  This paper from the University of Delaware presents a method for automatically converting Scalable Vector Graphics (SVG) into tactile representations for blind users using a Braille embosser. The key innovation exploits the hierarchical tree structure inherent in vector graphics…

  tactile graphics · blindness · scalable vector graphics · braille embosser · image accessibility

• Multimodal Virtual Reality Versus Printed Medium in Visualization for Blind People

  Wai Yu, Stephen Brewster · 2002 · Proceedings of the Fifth International ACM Conference on Assistive Technologies (Assets '02)

  This paper presents a comparative evaluation of two approaches for making bar chart data accessible to blind and visually impaired people: traditional raised tactile diagrams and a multimodal virtual reality system. The VR system combines a SensAble PHANToM force feedback device…

  data visualization · blindness and low vision · haptic technology · virtual reality · tactile graphics

• Constructing Sonified Haptic Line Graphs for the Blind Student: First Steps

  Rameshsharma Ramloll, Wai Yu, Stephen Brewster, Beate Riedel, Mike Burton, Gisela Dimigen · 2000 · Proceedings of the Fourth International ACM Conference on Assistive Technologies (Assets '00)

  This paper presents early research from the University of Glasgow's MultiVis project, a three-year initiative investigating how different sensory modalities can make statistical information representations accessible to blind people. The focus is on making line graphs — a…

  data visualization · sonification · haptic technology · blindness and low vision · tactile graphics

• Tactile Imaging Using Watershed-Based Image Segmentation

  Sergio E. Hernandez, Kenneth E. Barner · 2000 · Proceedings of the Fourth International ACM Conference on Assistive Technologies (Assets '00)

  This paper from the University of Delaware proposes a new image segmentation method for automatically converting visual images into tactile representations suitable for display on tactile devices such as microcapsule (swell) paper. The core problem addressed is that existing…

  tactile graphics · image processing · blindness and low vision · image accessibility · computer vision

• A Study of Blind Drawing Practice: Creating Graphical Information Without the Visual Channel

  Hesham M. Kamel, James A. Landay · 2000 · Proceedings of the Fourth International ACM Conference on Assistive Technologies (Assets '00)

  This paper from UC Berkeley investigates how blind users create drawings and proposes a grid-based model for non-visual drawing tools. The researchers began by observing that existing drawing tools for blind users fail because they lack adequate contextual feedback — blind users…

  tactile graphics · blindness and low vision · non-visual interaction · drawing tools · accessible graphics

• TGuide: A Guidance System for Tactile Image Exploration

  Martin Kurze · 1998 · Proceedings of the Third International ACM Conference on Assistive Technologies (Assets '98)

  This paper presents TGuide, a system that actively guides blind users' hands during exploration of tactile graphics using a novel vibrotactile directional output device. The author identifies three key problems with unaided tactile image exploration: blind users cannot get a…

  tactile graphics · blind and low vision · vibrotactile display · haptic technology · directional guidance

• AudioGraf: A Diagram-Reader for the Blind

  Andrea R. Kennel · 1996 · Proceedings of the Second Annual ACM Conference on Assistive Technologies (Assets '96)

  This paper from ETH Zürich presents AudioGraf, a system that enables blind and visually impaired users to read diagrams through a combination of touch panel input and auditory display. The core problem addressed is that diagrams — widely used in technical reports and papers to…

  blindness and low vision · auditory display · tactile graphics · diagram accessibility · non-visual access

• TDraw: A Computer-Based Tactile Drawing Tool for Blind People

  Martin Kurze · 1996 · Proceedings of the Second Annual ACM Conference on Assistive Technologies (Assets '96)

  This paper from Freie Universität Berlin presents TDraw, a computer-based system that enables blind people to create tactile drawings and, equally importantly, allows researchers to study how blind people draw. The paper begins with a theoretical analysis of how blind and…

  blindness and low vision · tactile graphics · tactile drawing · mental model · spatial cognition