System and method for calibrating a monocular optical see-through head-mounted display system for augmented reality
First Claim
1. A method for calibrating a monocular see-through HMD (head-mounted display) for augmented reality, the method comprising the steps of:
- displaying a marker image on one display of an HMD for view by a user;
aligning the displayed marker image with a preselected reference point;
collecting calibration data associated with the alignment; and
computing a model of the HMD using the collected calibration data.
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Abstract
A system and method for calibrating a monocular optical see-through HMD (head-mounted display). A preferred method integrates measurement for an optical see-through HMD and a six degrees of freedom tracker that is fixedly attached to the HMD to perform calibration. Calibration is based on the alignment of image points with a single 3D reference point in a world coordinate system from various viewpoints. The user interaction to perform the calibration is extremely easy compared to conventional methods and does not require keeping the head static during the calibration process. In one aspect, a calibration method comprises the steps of: displaying a marker image on one display of an HMD for view by a user; aligning the displayed marker image with a preselected reference point; collecting calibration data associated with the alignment; and computing a model of the HMD using the collected calibration data.
207 Citations
17 Claims
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1. A method for calibrating a monocular see-through HMD (head-mounted display) for augmented reality, the method comprising the steps of:
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displaying a marker image on one display of an HMD for view by a user;
aligning the displayed marker image with a preselected reference point;
collecting calibration data associated with the alignment; and
computing a model of the HMD using the collected calibration data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform method steps for calibrating a monocular see-through HMD (head-mounted display) for augmented reality, the method steps comprising:
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displaying a marker image on one display of an HMD for view by a user;
receiving as input, calibration data associated with an alignment of the displayed marker image with a preselected reference point; and
computing a model of the HMD using the collected calibration data. - View Dependent Claims (10, 11, 12, 13, 14, 16)
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15. An augmented reality system, comprising:
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a monocular see-through HMD (head-mounted display);
a tracker system comprising a transmitter and at least one sensor, wherein the sensor is fixedly attached to the HMD; and
a workstation, operatively connected to the tracker system and HMD, comprising computer readable program code embodied therein for calibrating the HMD, wherein the computer readable program code comprises program code for displaying a marker image on one display of an HMD for view by a user;
receiving as input, calibration data associated with an alignment of the displayed marker image with a preselected reference point; and
computing a model of the HMD using the collected calibration data.
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17. A method for calibrating a monocular see-through HMD (head-mounted display) for augmented reality, the method comprising the steps of:
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collecting calibration data by aligning a maker image displayed in the HMD to a fixed location viewed by an individual through the HMD for each of a plurality of different viewpoints; and
computing a model using the calibration data, wherein the model defines a relation between a coordinate system of a virtual camera and a coordinate system of a sensor fixedly attached to the HMD, wherein the virtual camera comprises a combination of the HMD and one eye of the individual.
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Specification