Videometric head tracker for augmented reality applications

Adam L. Janin; Karel Zikan; David Mizell; Mike Banner; Henry A. Sowizral

doi:10.1117/12.197323

21 December 1995 Videometric head tracker for augmented reality applications

Adam L. Janin, Karel Zikan, David Mizell, Mike Banner, Henry A. Sowizral

Proceedings Volume 2351, Telemanipulator and Telepresence Technologies; (1995) https://doi.org/10.1117/12.197323
Event: Photonics for Industrial Applications, 1994, Boston, MA, United States

Abstract

For the past three years, we have been developing augmented reality technology for application to a variety of touch labor tasks in aircraft manufacturing and assembly. The system would be worn by factory workers to provide them with better-quality information for performing their tasks than was previously available. Using a see-through head-mounted display (HMD) whose optics are set at a focal length of about 18 in., the display and its associated head tracking system can be used to superimpose and stabilize graphics on the surface of a work piece. This technology would obviate many expensive marking systems now used in aerospace manufacturing. The most challenging technical issue with respect to factory applications of AR is head position and orientation tracking. It requires high accuracy, long- range tracking in a high-noise environment. The approach we have chosen uses a head- mounted miniature video camera. The user's wearable computer system utilizes the camera to find fiducial markings that have been placed on known coordinates on or near the work piece. The system then computes the user's position and orientation relative to the fiducial marks. It is referred to as a `videometric' head tracker. In this paper, we describe the steps we took and the results we obtained in the process of prototyping our videometric head tracker, beginning with analytical and simulation results, and continuing through the working prototypes.

Citation Download Citation

Adam L. Janin, Karel Zikan, David Mizell, Mike Banner, and Henry A. Sowizral "Videometric head tracker for augmented reality applications", Proc. SPIE 2351, Telemanipulator and Telepresence Technologies, (21 December 1995); https://doi.org/10.1117/12.197323

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