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Proceedings Paper

In-flight evaluation of an Optical Head Motion Tracker II
Author(s): Kazuho Tawada; Koji Omura
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Paper Abstract

We resented a new approach for Optical HMT (Head Motion Tracker) past years (Proc. SPIE 6955, 69550A, 2008, Proc. SPIE 7326, 732607/73260L, 2009) [1]-[3]. 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 had 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 (2007). We have also reported some experimental results conducted in flight test, which proves good accuracy even in the sunlight condition (2008). Shimadzu Corp. and JAXA (Japan Aerospace Exploration Agency) are conducting joint research named SAVERH (Situation Awareness and Visual Enhancer for Rescue Helicopter) [2]-[3] 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. Through 16 flights including night flights, the potential capability of the system was demonstrated and issues for further improvement were identified.

Paper Details

Date Published: 6 May 2010
PDF: 9 pages
Proc. SPIE 7688, Head- and Helmet-Mounted Displays XV: Design and Applications, 76880B (6 May 2010); doi: 10.1117/12.851139
Show Author Affiliations
Kazuho Tawada, Shimadzu Corp. (Japan)
Koji Omura, Shimadzu Corp. (Japan)

Published in SPIE Proceedings Vol. 7688:
Head- and Helmet-Mounted Displays XV: Design and Applications
Peter L. Marasco; Paul R. Havig, Editor(s)

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