Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Cascading classifier(also: Staged classifier, Multi-stage classifier)
- A machine learning architecture that applies progressively more computationally expensive analysis stages, with each stage filtering out easy-to-classify cases so that only ambiguous instances proceed to deeper analysis. In accessibility applications, cascading classifiers…
- Collision Prediction(also: Collision risk prediction, Trajectory prediction)
- The task of estimating the future trajectories of surrounding pedestrians and obstacles and determining whether any of them will intersect with a user's own future position within a short prediction horizon (typically 2–4 seconds). In assistive technology for blind travellers,…
- Color Histogram(also: Colour histogram, Histogram tracking)
- A statistical summary of the distribution of colour values across the pixels of an image or image region, often computed in a perceptual colour space such as Lab. In assistive computer-vision systems for blind users, colour histograms are used to re-identify and track a specific…
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