An automated calibration method for non-see-through head mounted displays

Gilson, S. J., Fitzgibbon, A. W. and Glennerster, A. ORCID: https://orcid.org/0000-0002-8674-2763 (2011) An automated calibration method for non-see-through head mounted displays. Journal of Neuroscience Methods, 199 (2). pp. 328-335. ISSN 0165-0270 doi: 10.1016/j.jneumeth.2011.05.011

Abstract/Summary

Accurate calibration of a head mounted display (HMD) is essential both for research on the visual system and for realistic interaction with virtual objects. Yet, existing calibration methods are time consuming and depend on human judgements, making them error prone, and are often limited to optical see-through HMDs. Building on our existing approach to HMD calibration Gilson et al. (2008), we show here how it is possible to calibrate a non-see-through HMD. A camera is placed inside a HMD displaying an image of a regular grid, which is captured by the camera. The HMD is then removed and the camera, which remains fixed in position, is used to capture images of a tracked calibration object in multiple positions. The centroids of the markers on the calibration object are recovered and their locations re-expressed in relation to the HMD grid. This allows established camera calibration techniques to be used to recover estimates of the HMD display's intrinsic parameters (width, height, focal length) and extrinsic parameters (optic centre and orientation of the principal ray). We calibrated a HMD in this manner and report the magnitude of the errors between real image features and reprojected features. Our calibration method produces low reprojection errors without the need for error-prone human judgements.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/23159
Identification Number/DOI	10.1016/j.jneumeth.2011.05.011
Refereed	Yes
Divisions	Interdisciplinary Research Centres (IDRCs) > Centre for Integrative Neuroscience and Neurodynamics (CINN) Life Sciences > School of Psychology and Clinical Language Sciences > Neuroscience Life Sciences > School of Psychology and Clinical Language Sciences > Department of Psychology Life Sciences > School of Psychology and Clinical Language Sciences > Perception and Action
Uncontrolled Keywords	Head mounted display; Non-see-through; Calibration; Photogrammetry; Immersive virtual reality
Publisher	Elsevier
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