Glossary
Searchable terminology from accessibility, web standards, and related fields.
11 results found in gesture interaction.
- Eyelid Gesture (Eyelid Interaction, Eyelid-Based Input)
- An eyelid gesture is a deliberate eye movement used as an input method for controlling digital devices, involving intentional opening and closing of one or both eyelids in specific patterns, sequences…
- Foot-Based Interaction (Foot Input, Foot Gesture Interaction)
- An interaction technique that uses foot movements and gestures as input for controlling digital devices. Foot-based interaction is particularly relevant for people with upper body motor impairments wh…
- Gesture Input (Gesture Recognition, Gesture-Based Interaction)
- An input method that uses physical movements of the body — typically hands, fingers, arms, or head — to interact with digital systems. Gesture input includes touchscreen gestures (swipes, taps, pinche…
- Gesture-Based Input (Gesture input, Gestural input, Gesture-based text entry)
- An input method that interprets finger or hand movements — such as swipes, taps, and drawn paths — as commands or text characters. For people with visual impairments, gesture-based input on touchscree…
- Histogram of Oriented Gradients (HOG)
- A feature descriptor technique used in computer vision for object detection that counts occurrences of gradient orientations in localized portions of an image. HOG captures edge and texture informatio…
- Mid-Air Gesture (In-Air Gesture, Free-Space Gesture)
- A hand or arm movement performed in three-dimensional space, away from any surface, that is recognized by sensors as a command input. Mid-air gestures can be detected using cameras, depth sensors, or …
- Motion History Image (MHI)
- A computer vision technique that represents motion in video sequences as a single grayscale image, where pixel intensity indicates recency of movement. Brighter pixels represent more recent motion whi…
- On-Body Interaction (Body-centric interaction, Skin input, On-body input)
- An interaction paradigm that uses the surface of the user's own body as an input medium, typically through gestures like taps, swipes, or touches on the skin. On-body interaction leverages tactile and…
- On-body Input (Skin-based Input, Body-based Interaction)
- An interaction technique that uses the surface of the user's own body — typically the hand, arm, or other skin areas — as an input surface for controlling digital devices. On-body input is sensed thro…
- Optical Flow
- A computer vision method that estimates the apparent motion of objects between consecutive video frames by tracking pixel displacement patterns. Optical flow calculates velocity vectors showing moveme…
- Unistroke Gesture (Single-Stroke Gesture, Unistroke)
- A unistroke gesture is a shape or symbol drawn in a single continuous stroke on a touch screen or digitizer, which is then recognized by software as a specific command or input. In accessible interfac…