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Integrating touch-based inputs and outputs for communicating with computer systems into wearable technology.

Head tracking

Tracking the position and orientation of a user’s head with various sensor-enabled devices.


Actions or displays which are controlled by commands communicated through movement of the head via a head tracking device.

Head-mounted display (HMD)

Glasses, goggles, or helmet-like devices with small digital displays in front of each eye which allow a user to see 3D digital graphics. The HMD usually is connected to a head tracker so that the digital graphics change with the user’s head movements.

Head-related transfer function

A mathematical modification of the sound spectrum which alters the amplitude and phase of acoustic signals in order to adjust for the effect which the shape of a user’s head has on sound.

Heads-up display

A digital display device through which a user can see virtual elements and digital graphics superimposed on the real world.

Heat Map

A color-coded map of a virtual environment which identifies the most heavily viewed areas of the space. Can be categorized based on a the amount of time spent in a given part of the virtual space or the focus of a user's gaze.

Hidden surface

The surface of an object which is hidden from view by other objects in front of it.


It‘s the science and practice of making holograms. A hologram is a photographic recording of a light field, rather than of an image formed by a lens. It‘s used to visualize a fully three-dimensional image of a virtual object.


The Microsoft HoloLens is a pair of mixed reality smartglasses developed and manufactured by Microsoft. The HoloLens is one of the first computers running the Windows Mixed Reality platform under the Windows 10 operating system.

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