Head tracking

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Head tracking refers to a motion tracking method for detecting the position, location and movements of the head in order to provide a representation corresponding to the viewing angle or to enable other control that takes place with the head. The detection can take place, for example, by sensors attached to the head , such as gyroscopic sensors or by one or more cameras directed towards the head, that is to say optical tracking . The areas of application range from the simplified viewing of 3D models to computer games and military use. Head tracking is also combined with eye tracking in some areas .

Applications

Single user display

A single-user display is a display that adapts its images for the viewer, usually using head tracking to their head and sometimes also using eye tracking to their eye movements by following the user with a video camera. The optimal use is limited to one user, as the screen can only react best to one head or one pair of eyes. However, there is also a modification of this technique that calculates a compromise for the best view of all when there are several viewers. However, this average is then not as optimal as for a single person. Single-user displays can be used with conventional monitors, i.e. 2D screens, but also with all types of 3D displays . For example, a 3D model can be viewed from different angles by simply moving his head back and forth in front of the monitor or up and down.

Head-mounted display

A head tracker is often part of a head-mounted display . If the viewer changes his line of sight, the calculated graphic is adjusted accordingly. In addition to or instead of a virtual graphic, the movements or other external systems, such as a camera, can also be controlled. In the hobby sector, such a camera control is used, for example, for first-person-view model flying.

Helmet-Mounted-Display-System

In a helmet-mounted display system, a head tracker is part of a helmet, for example a pilot's. A camera is controlled by actuators using head tracking and the camera image is reproduced on the helmet-mounted display. If the observer looks to the left, the camera automatically moves to the left - if the observer looks to the right, the camera automatically also moves to the right. In addition to or instead of the camera, other external systems can also be controlled or calculated graphics can be displayed. Head trackers can help the pilot to communicate faster with his machine than would otherwise be possible. In particular, target acquisition using a Joint Helmet Mounted Cueing System has proven to be very efficient.

See also

Individual evidence

  1. ↑ Aviation News: Denel Optronics Head-Tracker System for Eurofighter Typhoon  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Dead Link / www.aviationnews.us  
  2. ↑ La Moure Shattuck, Judson, III; Parisi, Vincent M., II; Smerdon, Arryn J .: Head tracker evaluation utilizing the dynamic tracker test fixture , in Head- and Helmet-Mounted Displays XII: Design and Applications. Edited by Brown, Randall W .; Reese, Colin E .; Marasco, Peter L .; Harding, Thomas H. Proceedings of the SPIE, Volume 6557, pp. 655706 (2007) bibcode : 2007SPIE.6557E ... 3L

Web links

Patent classifications European patent classification ECLA ( no complete list of relevant classes )

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