Tracking system and tracking method using same
First Claim
1. A tracking system comprising:
- a marker fixed to a measurement object;
a camera configured to photograph the marker and output a marker image;
a first inertia sensor fixed to the camera and configured to measure and output first acceleration and first angular velocity;
a second inertia sensor fixed to one of the measurement object and the marker, and configured to measure and output second acceleration and second angular velocity; and
a processor configured to;
primarily determine a position and a posture of the measurement object by using the marker image,determine gravitational acceleration from the first acceleration,determine, from the second acceleration, movement acceleration of the measurement object, by using the gravitational acceleration,secondarily determine the position of the measurement object by using the movement acceleration and an initial position of the measurement object, andsecondarily determine the posture of the measurement object by using the first angular velocity, the second angular velocity, and an initial tilted angle of the measurement object.
2 Assignments
0 Petitions
Accused Products
Abstract
A tracking system and a tracking method using the same are disclosed. The tracking system includes a marker, a camera unit, a first inertial measuring unit, a second inertial measuring unit and a tracking processing unit. The marker is fixed on the measurement object, and the camera unit outputs a marker image by photographing the marker. The first inertial measuring unit is fixed on the camera unit, and measures and outputs first inertia comprising first accelerated velocity and first angular velocity. The second inertial measuring unit is fixed to one of the measurement object and the marker, and measures and outputs second inertia comprising second accelerated velocity and second angular velocity. The tracking processing unit primarily extracts the position and the posture of the measurement object using the marker image, and secondarily extracts the position and the posture of the measurement object using the first and second inertias.
9 Citations
8 Claims
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1. A tracking system comprising:
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a marker fixed to a measurement object; a camera configured to photograph the marker and output a marker image; a first inertia sensor fixed to the camera and configured to measure and output first acceleration and first angular velocity; a second inertia sensor fixed to one of the measurement object and the marker, and configured to measure and output second acceleration and second angular velocity; and a processor configured to; primarily determine a position and a posture of the measurement object by using the marker image, determine gravitational acceleration from the first acceleration, determine, from the second acceleration, movement acceleration of the measurement object, by using the gravitational acceleration, secondarily determine the position of the measurement object by using the movement acceleration and an initial position of the measurement object, and secondarily determine the posture of the measurement object by using the first angular velocity, the second angular velocity, and an initial tilted angle of the measurement object. - View Dependent Claims (2)
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3. A tracking method comprising:
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photographing, by a camera, a marker fixed to a measurement object and outputting a marker image; primarily determining, by a processor, a position and a posture of the measurement object, from the marker image; measuring and outputting, by a first inertia sensor fixed to the camera, first acceleration and first angular velocity; measuring and outputting, by a second inertia sensor fixed to one of the measurement object and the marker, second acceleration and second angular velocity; secondarily determining, by the processor, the position of the measurement object by using the first acceleration, the second acceleration, and an initial position of the measurement object; and secondarily determining, by the processor, the posture of the measurement object, by using the first angular velocity, the second angular velocity, and an initial tilted angle of the measurement object, wherein secondarily determining the position of the measurement object by using the first acceleration, the second acceleration and the initial position of the measurement object includes; determining gravitational acceleration from the first acceleration; determining movement acceleration of the measurement object from the second acceleration by using the gravitational acceleration; and determining the position of the measurement object by using the movement acceleration and the initial position of the measurement object. - View Dependent Claims (4, 5, 6, 7, 8)
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Specification