Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 1 of 333
- 2D Tactile Display (Two-Dimensional Tactile Display, Graphical Tactile Display)
- A type of tactile display that presents information across a two-dimensional surface, enabling blind and low vision users to access complex graphical data such as diagrams, charts, maps, and graphical…
- 360 Video (360-Degree Video, Spherical Video, Omnidirectional Video)
- Video content recorded or rendered to capture a full spherical or panoramic field of view, allowing viewers to look in any direction by turning their head (in a VR headset) or by dragging the view (on…
- 360-Degree Video (360 Video, VR360, Spherical Video, Omnidirectional Video)
- Video content recorded or rendered to cover the full 360-degree sphere around the viewer, allowing them to look in any direction during playback. When viewed in a virtual reality headset, 360-degree v…
- 3D Audio (Three-Dimensional Audio, Binaural Audio, Immersive Audio)
- Audio technology that creates the perception of sound sources positioned in three-dimensional space around the listener, including above, below, and at varying distances. 3D audio uses head-related tr…
- 3D Environment Model (Building Information Model, Spatial Model, 3D Building Model)
- A detailed three-dimensional digital representation of a physical environment, such as a building interior, that includes the geometry of walls, floors, doors, windows, and fixed objects. In accessibi…
- 3D Gaussian Splatting (3DGS, Gaussian Splatting)
- An explicit 3D scene representation, introduced by Kerbl et al. in 2023, in which a scene is modelled as a cloud of anisotropic 3D Gaussians whose positions, shapes, colours, and opacities are optimis…
- 3D Instance Segmentation
- 3D instance segmentation is a computer vision technique that identifies and delineates individual objects within a three-dimensional point cloud or mesh, assigning a distinct label to each detected in…
- 3D Printed Model (3D Print, Additive Manufacturing Model)
- A physical object created through additive manufacturing (layer-by-layer material deposition) that can serve as an accessible learning tool for blind and low vision users. 3D printing enables rapid, c…
- 3D Printed Tactile Model (3D tactile model, Tactile 3D model, 3D-printed accessibility model)
- A physical, three-dimensional object produced by additive manufacturing (for example fused deposition modelling or stereolithography) that is designed to be explored by touch rather than sight. 3D pri…
- 3D Printing (Additive Manufacturing, AM)
- A manufacturing process that creates three-dimensional objects by depositing material layer by layer according to a digital design. Unlike subtractive manufacturing which removes material from a solid…
- 3D Printing Pen (3D Pen)
- A handheld device that extrudes a quick-cooling thermoplastic filament (commonly PLA, PCL, or ABS) through a heated nozzle, leaving raised, three-dimensional lines that solidify within seconds of bein…
- 3D Printing for Accessibility (Accessible 3D Printing, Additive Manufacturing for Accessibility)
- The use of 3D printing technology to create custom assistive devices, tactile materials, and accessible objects for people with disabilities. Applications include tactile graphics and maps, customized…
- 3D Reconstruction (Scene Reconstruction, 3D Scene Reconstruction)
- The computer vision task of recovering the 3D structure of a scene - geometry, camera positions, and sometimes object trajectories - from one or more 2D images or video frames. Techniques range from c…
- 3D-Printed Assistive Technology (3D-Printed AT)
- Assistive devices manufactured using 3D printing technology, typically fused deposition modeling with thermoplastic materials like PLA. These devices can be rapidly prototyped and customized to indivi…
- A* Path Planning (A-star algorithm, A* search)
- A classic graph-search algorithm (Hart, Nilsson, and Raphael, 1968) that finds the shortest or lowest-cost path between two points by combining the cost already travelled with a heuristic estimate of …
- AAC
- Abbreviation for Augmentative and Alternative Communication. AAC encompasses all forms of communication other than oral speech that are used to express thoughts, needs, wants, and ideas. This includes…
- AAC Abandonment (AAC Device Abandonment, AT Abandonment)
- The widespread phenomenon of users discontinuing their use of augmentative and alternative communication (AAC) devices, particularly common among people with aphasia. Abandonment is driven by multiple…
- AAC Corpus (AAC Text Corpus, Augmentative Communication Corpus)
- A collection of text produced by or representative of Augmentative and Alternative Communication (AAC) device users, used for training and evaluating language models and word prediction systems. AAC c…
- AAC Device (AAC System, Communication Device)
- A dedicated hardware device or software application designed to support augmentative and alternative communication for people who cannot rely on natural speech. AAC devices range from low-tech options…
- AAC Symbol Set (Symbol Set, Communication Symbol Set, Pictographic Symbol Set)
- A standardised collection of pictographic images used in augmentative and alternative communication (AAC) to represent words, phrases, or concepts. Each symbol in a set is mapped to specific vocabular…