Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Caption(also: Image Caption, Figure Caption)
- In the context of image accessibility, a caption is text that describes or provides context for an image. Unlike alt text, which is typically hidden and read only by screen readers, captions are often visible to all users and may appear below or alongside an image. Captions can…
- Caption Crawler(also: Reverse Image Search Alt Text)
- A technique and tool that retrieves existing alternative text for web images by performing reverse image searches to find the same image on other websites where it has already been described. Rather than generating new descriptions, Caption Crawler reuses human-written alt text…
- Controlled Language(also: CL, Controlled Natural Language)
- A restricted subset of a natural language that limits vocabulary, grammar, and style to reduce ambiguity and improve clarity and consistency in writing. In accessibility, controlled language rules can be applied to verify and improve the quality of text alternatives for images,…
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