Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- MPEG-4 Facial Action Parameter(also: MPEG-4 FAP, FAP, Facial Action Parameter)
- A standard for 3D face animation defined in ISO/IEC 14496-2 (MPEG-4), which parameterises a face through 68 feature points whose displacements (scaled relative to the character's own facial proportions) encode any facial expression. MPEG-4 FAP is proportion-invariant, so the…
- Motion Design(also: Motion Graphics, Motion-Driven Design)
- The practice of animating graphic elements - text, icons, diagrams, captions - in time-based media to communicate instructional content. In accessible educational video, motion design is used to guide visual attention, sequence information, and pace the presentation of captions…
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