Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Inertial Measurement Unit(also: IMU)
- An electronic sensor module that combines accelerometers and gyroscopes (and sometimes magnetometers) to measure motion, orientation, and gravitational forces. IMUs are embedded in smartphones, smartwatches, and other wearable devices, where they can detect gestures, track…
- Inertial Sensing(also: IMU sensing, Inertial measurement)
- The use of accelerometers, gyroscopes, and magnetometers — often built into smartphones and wearable devices — to measure motion, orientation, and direction of movement. In accessibility applications, inertial sensing enables dead reckoning for indoor navigation where GPS is…
- Infrared Emitting Diode(also: IRED, IR LED, Infrared LED)
- A light-emitting diode that produces infrared radiation, used in assistive technology for motion tracking and position sensing. IREDs are commonly used in head-tracking systems, eye-tracking devices, and other assistive input methods where a camera detects the infrared light…
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