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Proceedings Paper

In-flight evaluation of an optical head motion tracker
Author(s): Kazuho Tawada
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Paper Abstract

We have presented a new approach for Optical HMT (Head Motion Tracker) last year (Proc. SPIE 6955, 69550A1-11, 2008) [1]. In existing Magnetic HMT, it is inevitable to conduct pre-mapping in order to obtain sufficient accuracy because of magnetic field's distortion caused by metallic material around HMT, such as cockpit and helmet. Optical HMT is commonly known as mapping-free tracker; however, it has some disadvantages on accuracy, stability against sunlight conditions, in terms of comparison with Magnetic HMT. We have succeeded to develop new Optical HMT, which can overcome particular disadvantages by integration with two area cameras, LED markers, image processing techniques and inertial sensors with simple algorithm in laboratory level environment. We have also reported some experimental results conducted in laboratory, which proves good accuracy even in the sunlight condition. This time, we show actual performance of the Optical HMT in flight condition, including evaluation of stability against sunlight. Shimadzu Corp. and JAXA (Japan Aerospace Exploration Agency) is conducting joint research named SAVERH (Situation Awareness and Visual Enhancer for Rescue Helicopter) [2] that aims at inventing method of presenting suitable information to the pilot to support search and rescue missions by helicopters. The Optical HMT has been evaluated through a series of flight evaluation in SAVERH and demonstrated the operation concept.

Paper Details

Date Published: 6 May 2009
PDF: 10 pages
Proc. SPIE 7326, Head- and Helmet-Mounted Displays XIV: Design and Applications, 73260L (6 May 2009); doi: 10.1117/12.818435
Show Author Affiliations
Kazuho Tawada, Shimadzu Corp. (Japan)


Published in SPIE Proceedings Vol. 7326:
Head- and Helmet-Mounted Displays XIV: Design and Applications
Peter L. Marasco; Paul R. Havig; Sion A. Jennings; Thomas H. Harding, Editor(s)

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