Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Phase-Based Motion Processing(also: Phase-Based Video Motion Processing, Phase-Based Motion Magnification)
- A family of computer vision techniques that decompose video frames into complex steerable pyramids and analyse changes in the temporal phase of each scale and orientation to recover motion, including sub-pixel movements invisible to the naked eye. Because it operates in the…
- Power Spectral Density(also: PSD, Power Spectrum)
- Power spectral density describes how the power of a time-varying signal is distributed across frequency components. It is a foundational tool in signal processing and shows up repeatedly in accessibility technology: in EMG-based input devices, PSD analysis of electrode signals…
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