NDLI: Improving static and dynamic registration in an optical see-through HMD

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Improving static and dynamic registration in an optical see-through HMD

Content Provider	ACM Digital Library
Author	Azuma, Ronald Bishop, Gary
Abstract	In Augmented Reality, see-through HMDs superimpose virtual 3D objects on the real world. This technology has the potential to enhance a user's perception and interaction with the real world. However, many Augmented Reality applications will not be accepted until we can accurately register virtual objects with their real counterparts. In previous systems, such registration was achieved only from a limited range of viewpoints, when the user kept his head still. This paper offers improved registration in two areas. First, our system demonstrates accurate static registration across a wide variety of viewing angles and positions. An optoelectronic tracker provides the required range and accuracy. Three calibration steps determine the viewing parameters. Second, dynamic errors that occur when the user moves his head are reduced by predicting future head locations. Inertial sensors mounted on the HMD aid head-motion prediction. Accurate determination of prediction distances requires low-overhead operating systems and eliminating unpredictable sources of latency. On average, prediction with inertial sensors produces errors 2-3 times lower than prediction without inertial sensors and 5-10 times lower than using no prediction at all. Future steps that may further improve registration are outlined.
Starting Page	197
Ending Page	204
Page Count	8
File Format	PDF PS / EPS
ISBN	0897916670
DOI	10.1145/192161.192199
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1994-07-24
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Registration Calibration Augmented reality
Content Type	Text
Resource Type	Article

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