Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 149 of 333
- Ideographic Characters (Ideographs, Logograms, CJK Characters, Han Characters)
- Ideographic characters are written symbols that represent a word, morpheme, or concept rather than an individual sound, as used in Chinese (Hanzi), Japanese (Kanji), and historically Korean (Hanja). B…
- Idiosyncratic Gesture (Personalised Gesture, Idiosyncratic Movement)
- A body-based communicative movement whose form and meaning are specific to one individual (and often to one communication partner), rather than drawn from a shared vocabulary like American Sign Langua…
- Illiteracy (Functional Illiteracy, Low Literacy)
- The inability to read or write, or having reading and writing skills below a functional level needed for everyday tasks. In the context of digital accessibility, illiteracy and low literacy present si…
- Illness Narrative (Disease Narrative)
- An illness narrative is the story a person and their significant others construct to give coherence to the disruptive experience of illness or diagnosis and its effects on the family system. In the co…
- Image Accessibility (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 (…
- Image Captioning (Automatic Image Description, AI Image Description)
- A computer vision task in which an AI model generates a natural language description of the content of an image. In accessibility contexts, image captioning technology enables visually impaired users …
- Image Classification (Visual Classification, Photo Classification)
- A computer vision task where a machine learning model assigns a category label to an input image based on its visual content. Image classifiers are trained on labeled example images and learn to recog…
- Image Description (Image Caption, Visual Description)
- A textual representation of the content of an image, providing information about objects, people, scenes, text, colors, spatial relationships, and other visual elements. Image descriptions serve as a …
- Image Description App (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 …
- Image Editing Accessibility (Accessible Image Editing, Accessible Photo Editing)
- The design of image editing tools and workflows that are usable by people with disabilities, particularly blind and low vision users who rely on screen readers. Key challenges include making spatial e…
- Image Enhancement (Image Pre-Compensation, Visual Enhancement)
- Image enhancement in the context of accessibility refers to techniques that modify digital images or on-screen content to improve their visibility and usability for people with visual impairments. Met…
- Image Map (Clickable Map, Imagemap)
- An HTML feature that allows different regions of a single image to be designated as separate hyperlinks, each pointing to a different URL. Image maps can be client-side (coordinates and links defined …
- Image Obfuscation (Image Masking, Visual Privacy Protection)
- Techniques applied to images to obscure or remove sensitive visual information before sharing or processing, such as blurring, pixelation, edge filtering, or masking regions of an image. In accessibil…
- Image Processing (Digital Image Processing)
- The use of computational algorithms to analyze, enhance, transform, or extract information from digital images. In accessibility, image processing techniques are applied to convert visual content into…
- Image Recognition (Image Classification, Computer Vision Recognition)
- The use of computer vision algorithms to identify and classify objects, text, faces, scenes, and other visual content in images or video. In accessibility applications, image recognition enables tools…
- Image Retrieval (Content-Based Image Retrieval, CBIR, Visual Search)
- A computer vision technique that searches a database of images to find ones similar to a query image based on visual features rather than text metadata. In accessibility applications, image retrieval …
- Image Segmentation (Region Segmentation)
- A computer vision technique that partitions a digital image into multiple distinct regions or segments based on shared characteristics such as color, intensity, or texture. In accessibility applicatio…
- Image Stitching (Photo Stitching, Panoramic Stitching)
- A computer vision technique that combines multiple overlapping photographs into a single wider or panoramic image. In accessibility contexts, image stitching enables blind users to capture more visual…
- Image description (Long description, Extended image description, Image alt)
- A detailed textual representation of an image's content, typically longer and more comprehensive than alt text. While alt text is a concise attribute embedded in HTML for screen readers, image descrip…
- Image sonification (Visual-to-audio mapping, Auditory image display)
- The process of converting visual information from images — such as shapes, charts, diagrams, or spatial layouts — into audio representations that can be perceived without vision. Image sonification ma…