System and method for calibrating a stereo optical see-through head-mounted display system for augmented reality
First Claim
1. A method for calibrating a stereo see-through HMD (head-mounted display) for augmented reality, the method comprising the steps of:
- displaying a 2-dimensional marker image on each eye display of a stereo HMD for view by a user, wherein the 2-dimensional marker images are displayed with an offset so as to induce a 3-dimensional marker that is perceived by the user as being at a distance away from the user;
aligning the 3-dimensional 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.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method for calibrating a stereo 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 a stereoscopically fused marker image, which is perceived in depth, 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 method for calibrating a stereo HMD comprises the steps of displaying a 2-dimensional marker image on each eye display of the stereo HMD for view by a user, wherein the 2-dimensional marker images are displayed with an offset so as to induce a 3-dimensional marker that is perceived by the user as being at a distance away from the user; aligning the 3-dimensional 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.
-
Citations
26 Claims
-
1. A method for calibrating a stereo see-through HMD (head-mounted display) for augmented reality, the method comprising the steps of:
-
displaying a 2-dimensional marker image on each eye display of a stereo HMD for view by a user, wherein the 2-dimensional marker images are displayed with an offset so as to induce a 3-dimensional marker that is perceived by the user as being at a distance away from the user;
aligning the 3-dimensional 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, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25)
-
-
13. 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 stereo see-through HMD (head-mounted display) for augmented reality, the method steps comprising:
-
displaying a 2-dimensional marker image on each eye display of a stereo HMD for view by a user, wherein the 2-dimensional marker images are displayed with an offset so as to induce a 3-dimensional marker that is perceived by the user as being at a distance away from the user;
receiving as input, calibration data associated with an alignment of the 3-dimensional marker image with a preselected reference point; and
computing a model of the HMD using the collected calibration data.
-
-
23. An augmented reality system, comprising:
-
a stereo see-through HMD (head-mounted display) comprising a first and second eye 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 simultaneously collecting calibration data for a first virtual camera and second virtual camera to compute a model that defines a relation between the first virtual camera and the sensor and a relation between the second virtual camera and the sensor, wherein the first virtual camera comprises a combination of the left eye of the individual and a left eye display of the HMD and wherein the second virtual camera comprises a combination of the right eye of the individual and a right eye display of the HMD.
-
-
26. A method for calibrating a stereo see-through HMD (head-mounted display) for augmented reality, the method comprising the steps of:
-
collecting calibration data by aligning a 3-dimensional maker image, which is perceived by a user through a first and second eye display of the HMD, to a fixed location, which is viewed by an individual through the HMD, for each of a plurality of different viewpoints within a same approximate distance away from the fixed location; 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 tracker sensor fixedly attached to the HMD, wherein the virtual camera comprises a combination of the first and second eye displays of the HMD and both eyes of an individual.
-
Specification