Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Vision Language Model(also: VLM, Vision-Language Model, Multimodal Large Language Model)
- A machine-learning model trained to take both images and natural-language text as input and to produce natural-language output. Modern VLMs — such as GPT-4o, Gemini, and Claude — can describe a photo, read text inside an image, answer questions about a scene, identify objects,…
- Visual assistance technology(also: VAT, AI visual assistance, Visual interpretation service)
- Technology that uses artificial intelligence, computer vision, or human volunteers to provide visual information to blind and low-vision users. Examples include apps like Seeing AI, Be My Eyes, and Lookout, which can identify objects, read text, describe scenes, and recognise…
- Viterbi Algorithm
- The Viterbi algorithm is a dynamic-programming procedure for finding the most likely sequence of hidden states in a Hidden Markov Model given a sequence of observations. It is the standard solution to part-of-speech tagging, many speech-recognition tasks, and decoding problems…
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