Gesture Interaction

An input modality in which users control digital systems through hand, arm, or body movements detected by cameras, depth sensors, IMUs, or wearable devices rather than through traditional keyboards, pointing devices, or touchscreens. Gesture interaction underpins many augmented and virtual reality experiences — for example, pinch, grab, and swipe gestures on head-worn AR glasses — and is increasingly relevant to rehabilitation, accessible gaming, and hands-free computing contexts where touch-based input is impractical. Accessibility considerations include range-of-motion requirements, fatigue, occlusion, recognition reliability for atypical movement patterns, and the need for alternative input fallbacks for users whose motor capabilities differ from assumed norms.