Chart4Blind: An Intelligent Interface for Chart Accessibility Conversion
Proceedings of the 29th International Conference on Intelligent User Interfaces(2024)
摘要
In a world driven by data visualization, ensuring the inclusive accessibility
of charts for Blind and Visually Impaired (BVI) individuals remains a
significant challenge. Charts are usually presented as raster graphics without
textual and visual metadata needed for an equivalent exploration experience for
BVI people. Additionally, converting these charts into accessible formats
requires considerable effort from sighted individuals. Digitizing charts with
metadata extraction is just one aspect of the issue; transforming it into
accessible modalities, such as tactile graphics, presents another difficulty.
To address these disparities, we propose Chart4Blind, an intelligent user
interface that converts bitmap image representations of line charts into
universally accessible formats. Chart4Blind achieves this transformation by
generating Scalable Vector Graphics (SVG), Comma-Separated Values (CSV), and
alternative text exports, all comply with established accessibility standards.
Through interviews and a formal user study, we demonstrate that even
inexperienced sighted users can make charts accessible in an average of 4
minutes using Chart4Blind, achieving a System Usability Scale rating of 90
comparison to existing approaches, Chart4Blind provides a comprehensive
solution, generating end-to-end accessible SVGs suitable for assistive
technologies such as embossed prints (papers and laser cut), 2D tactile
displays, and screen readers. For additional information, including open-source
codes and demos, please visit our project page
https://moured.github.io/chart4blind/.
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