Method and apparatus for optical inertial measurement
First Claim
1. An apparatus for optical inertial measurement, comprising:
- a body;
an optical head mounted on the body, the optical head having at least one optical element creating an optical path to at least one viewing region;
a sensor in communication with the at least one optical element and adapted to receive both linear and two dimensional images of the at least one viewing region; and
a processor adapted to receive signals from the sensor and perform optical flow motion extraction of the at least one viewing region, the speed and direction of movement of the body and the orientation of the body in terms of pitch, roll and yaw being determined by monitoring the rate and direction of movement of pixel shift within the at least one viewing region, sequentially comparing consecutive images and calculating attitude.
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Abstract
A method and an apparatus for optical inertial measurement includes a body with an optical head mounted on the body. The optical head has at least one optical element creating an optical path to at least one viewing region. A sensor is in communication with the at least one optical element and adapted to receive images of the at least one viewing region. A processor is provided which is adapted to receive signals from the sensor and perform optical flow motion extraction of the at least one viewing region. The speed and direction of movement of the body and the orientation of the body in terms of pitch, roll and yaw being determined by monitoring the rate and direction of movement of pixel shift within the at least one viewing region, sequentially comparing consecutive images and calculating attitude.
66 Citations
15 Claims
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1. An apparatus for optical inertial measurement, comprising:
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a body;
an optical head mounted on the body, the optical head having at least one optical element creating an optical path to at least one viewing region;
a sensor in communication with the at least one optical element and adapted to receive both linear and two dimensional images of the at least one viewing region; and
a processor adapted to receive signals from the sensor and perform optical flow motion extraction of the at least one viewing region, the speed and direction of movement of the body and the orientation of the body in terms of pitch, roll and yaw being determined by monitoring the rate and direction of movement of pixel shift within the at least one viewing region, sequentially comparing consecutive images and calculating attitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. An apparatus for optical inertial measurement, comprising:
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an elongate body having an axis, the body being adapted for mounting with the axis in a substantially vertical orientation;
an optical head mounted on the body, the optical head having at least five earth reference optical elements arranged spatially around the axis in a known spatial relationship, with each of the earth reference five optical elements being focused in a different direction and angled downwardly at a known angle relative to the axis to create an optical viewing path to an earth reference viewing region, one of the five earth reference optical elements being a nadir optical element focused along the axis to create an optical path to an earth reference viewing region of a nadir;
a sensor in communication with each earth reference optical element, the sensor being adapted to receive both linear and two dimensional images of each earth reference viewing region; and
a processor adapted to receive signals from the sensor and perform optical flow motion extraction of each earth reference viewing region individually and collectively, the speed and direction of movement of the body and the orientation of the body in terms of pitch, roll and yaw being determined by monitoring the rate and direction of movement of pixel shift of each of the earth reference viewing regions, sequentially comparing consecutive images and calculating attitude. - View Dependent Claims (11)
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12. A method for optical inertial measurement, comprising:
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receiving images of at least one viewing region;
performing optical flow motion extraction of the at least one viewing region, with the speed and direction of movement and orientation in terms of pitch, roll and yaw being determined by monitoring the rate and direction of movement of pixel shift within the at least one viewing region, sequentially comparing consecutive images and calculating attitude. - View Dependent Claims (13, 14, 15)
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Specification