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Related Experiment Video

Updated: Aug 30, 2025

Author Spotlight: An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System

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Evaluating the effectiveness of automatic image captioning for web accessibility.

Maurizio Leotta¹, Fabrizio Mori¹, Marina Ribaudo¹

¹DIBRIS - University of Genova, Genova, Italy.

Universal Access in the Information Society

|August 29, 2022

Summary

This summary is machine-generated.

This study evaluated AI tools for generating image descriptions, crucial for web accessibility. While human-written descriptions remain superior, some AI tools show promise for improving web content accessibility.

Keywords:

Alt-text Automatic image captioning User testing Web accessibility

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Area of Science:

Computer Science
Web Accessibility
Human-Computer Interaction

Background:

The web is essential for daily activities, necessitating universal accessibility.
Web accessibility requires descriptive text for images, often a manual burden for developers.
Machine learning tools offer automated image description generation.

Purpose of the Study:

To evaluate the accuracy of AI-generated image descriptions compared to human-created ones.
To assess the potential of automated tools in enhancing web accessibility.

Main Methods:

Selected 60 Wikipedia images and their human-written descriptions.
Generated descriptions using four AI tools: Azure Computer Vision Engine, Amazon Rekognition, Cloudsight, and Auto Alt-Text.
Had 76 computer science students blindly evaluate the perceived correctness of all descriptions.

Main Results:

Human-written Wikipedia descriptions were perceived as the most accurate.
Certain AI tools produced strong results for specific image categories.
AI tools show potential for large-scale, automated image description.

Conclusions:

While AI-generated descriptions are not yet perfect, they can significantly improve web accessibility.
Further development of AI tools could alleviate the manual effort in alt-text creation.
Automated solutions are key to drastically increasing web accessibility for all users.