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

Gilson SJ, Fitzgibbon AW, Glennerster A - J. Neurosci. Methods (2011)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK. stuart.gilson@physiol.ox.ac.uk

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The purpose of calibration is to find values for the displays’ intrinsic parameters, and also the position and orientation of the displays with respect to the HMD's tracked centre.
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fig0005: The purpose of calibration is to find values for the displays’ intrinsic parameters, and also the position and orientation of the displays with respect to the HMD's tracked centre.

Mentions: Our aim was to find estimates of the intrinsic and extrinsic matrices which define the HMD display (shown pictorially in Fig. 1). The extrinsic matrix describes the location of the optic centre of the HMD display and the orientation of the principal ray (in world coordinates):(1)S=RTT01where R is a 3 × 3 rotation matrix and T is a 1 × 3 translation matrix, i.e., 6 extrinsic parameters.


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

Gilson SJ, Fitzgibbon AW, Glennerster A - J. Neurosci. Methods (2011)

The purpose of calibration is to find values for the displays’ intrinsic parameters, and also the position and orientation of the displays with respect to the HMD's tracked centre.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3142613&req=5

fig0005: The purpose of calibration is to find values for the displays’ intrinsic parameters, and also the position and orientation of the displays with respect to the HMD's tracked centre.
Mentions: Our aim was to find estimates of the intrinsic and extrinsic matrices which define the HMD display (shown pictorially in Fig. 1). The extrinsic matrix describes the location of the optic centre of the HMD display and the orientation of the principal ray (in world coordinates):(1)S=RTT01where R is a 3 × 3 rotation matrix and T is a 1 × 3 translation matrix, i.e., 6 extrinsic parameters.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK. stuart.gilson@physiol.ox.ac.uk

Show MeSH
Related in: MedlinePlus