Precision landmark-aided navigation
First Claim
Patent Images
1. A method of navigation, comprising:
- processing imagery to extract a first set of landmark features with a first extraction algorithm;
processing imagery from an image sensor with a second extraction algorithm to extract a second set of landmark features; and
correlating the second set of landmark features to the first set of landmark features to estimate a latitude, longitude, and altitude of the image sensor.
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Abstract
Navigational systems and methods are disclosed herein to provide accurate processing of two-dimensional sensor images for navigation and determination of position in three-dimensions. Landmark features are extracted from two-dimensional sensor images and correlated to landmark features data stored in a database to estimate latitude, longitude, and altitude of a vehicle or missile.
71 Citations
38 Claims
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1. A method of navigation, comprising:
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processing imagery to extract a first set of landmark features with a first extraction algorithm; processing imagery from an image sensor with a second extraction algorithm to extract a second set of landmark features; and correlating the second set of landmark features to the first set of landmark features to estimate a latitude, longitude, and altitude of the image sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of navigation, comprising:
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processing pre-existing imagery to extract a first set of landmark features with a first extraction algorithm; providing a landmark feature database including the first set of landmark features; processing two-dimensional imagery from an in-flight image sensor with a second extraction algorithm to extract a second set of landmark features; and correlating the second set of landmark features to the landmark feature database to estimate a latitude, longitude, and altitude of the image sensor. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of navigation, comprising:
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providing a database; processing two-dimensional image data from an airborne sensor; comparing the two-dimensional image data to the database; and determining a three-dimensional location of the airborne sensor based upon a comparison of the two-dimensional image data to the database, wherein the three-dimensional location includes a latitude, longitude, and altitude of the airborne sensor. - View Dependent Claims (26, 27)
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28. A navigation system, comprising:
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a database including a first set of landmark features extracted from pre-existing imagery; an airborne image sensor to provide in-flight imagery; and a processor operably coupled to the database and the image sensor, wherein the processor is operable to; process imagery from the image sensor to extract a second set of landmark features, and correlate the second set of landmark features to the first set of landmark features to estimate a latitude, longitude, and altitude of the image sensor. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification