Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Icon Size(also: Target Size, Touch Target Size)
- The physical or rendered dimensions of graphical interface elements such as icons, buttons, and interactive controls. Research consistently shows that larger icon sizes improve interaction performance for users with low vision and motor impairments. WCAG 2.1 Success Criterion…
- Image Accessibility(also: Visual Content Accessibility)
- The practice of making images perceivable and understandable to people who cannot see them, primarily through alternative text descriptions. Image accessibility is a foundational requirement of WCAG (Success Criterion 1.1.1) and involves providing text alternatives that convey…
- Image Description App(also: Visual assistance app, AI visual description app)
- A smartphone or wearable application that captures an image of the user's surroundings and returns a spoken or textual description of its content, aimed primarily at blind and low-vision users. Early crowdsourced systems such as VizWiz (2010) relied on remote human workers;…
- Instance-Level Recognition(also: Instance Recognition, Fine-Grained Recognition)
- A computer vision task that involves distinguishing between specific individual objects within the same general category, rather than just identifying broad categories. For example, while category-level recognition might identify something as "a bag of chips," instance-level…
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