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Data visualization serves as a crucial tool for communicating importantinformation in our society. Yet, as visualizations grow more complex, theybecome less accessible to individuals with visual impairments. Traditionalaccessibility approaches like alternative text and data tables often fall shortof capturing the full potential of data visualization. To bridge this gap, weintroduce VizAbility, a novel multimodal accessible system that combineskeyboard navigation with conventional interaction, enabling individuals withvisual impairments to actively engage with and explore data visualizations.VizAbility utilizes an LLM-based pipeline, seamlessly integrating data, chartstructures, user locality, and web-based information to provide comprehensiveanswers. Our quantitative evaluation validates the LLM-basedquestion-and-answer pipeline, and a user study involving six participantsunderscores the promising potential of VizAbility's multimodal approach. Wediscuss how current visualization tools can integrate VizAbility to enhance theaccessibility of data visualizations online.

VizAbility: Multimodal Accessible Data Visualization with Keyboard Navigation and Conversational Interaction