Spectral tracking
First Claim
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1. A method of tracking a target, comprising the steps of:
- (a) acquiring a first spectral image of a scene that includes the target;
(b) designating a spectral reference window, in said first spectral image, that includes a respective plurality of pixel vectors;
(c) acquiring a second spectral image, of said scene, that includes a respective plurality of pixel vectors; and
(d) hypercorrelating said spectral reference window with said second spectral image, thereby obtaining a hypercorrelation function, a maximum of said hypercorrelation function then corresponding to a location of the target in said scene.
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Abstract
A method of tracking a target. The method includes the steps of acquiring a first spectral image of a scene that includes the target, designating a spectral reference window, in the first spectral image, that includes a respective plurality of pixel vectors, acquiring a second spectral image, of the scene, that includes a respective plurality of pixel vectors, and hypercorrelating the spectral reference window with the second spectral image, thereby obtaining a hypercorrelation function, a maximum of the hypercorrelation function then corresponding to a location of the target in the scene.
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Citations
18 Claims
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1. A method of tracking a target, comprising the steps of:
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(a) acquiring a first spectral image of a scene that includes the target; (b) designating a spectral reference window, in said first spectral image, that includes a respective plurality of pixel vectors; (c) acquiring a second spectral image, of said scene, that includes a respective plurality of pixel vectors; and (d) hypercorrelating said spectral reference window with said second spectral image, thereby obtaining a hypercorrelation function, a maximum of said hypercorrelation function then corresponding to a location of the target in said scene. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of tracking a target, comprising the steps of:
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(a) acquiring a first spectral image of a scene that includes the target; (b) designating a spectral reference window in said first spectral image; (c) acquiring a second spectral image of said scene; (d) hypercorrelating said spectral reference window with said second spectral image, thereby obtaining a hypercorrelation function, a maximum of said hypercorrelation function then corresponding to a location of the target in said scene; (e) acquiring a first panchromatic image of said scene; (f) designating a panchromatic reference window in said first panchromatic image; (g) acquiring a second panchromatic image of said scene; (h) correlating said panchromatic reference window with said second panchromatic image, thereby obtaining a correlation function; and (i) combining said hypercorrelation function with said correlation function to obtain a joint correlation function, a maximum of said joint correlation function then corresponding to a location of the target in said scene. - View Dependent Claims (9, 10, 11)
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12. A method of tracking a target, comprising the steps of:
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(a) acquiring a first spectral image of a scene that includes the target; (b) designating a spectral reference window in said first spectral image; (c) acquiring a second spectral image of said scene; and (d) hypercorrelating said spectral reference window with said second spectral image, thereby obtaining a hypercorrelation function, a maximum of said hypercorrelation function then corresponding to a location of the target in said scene; wherein each said spectral image includes; (a) a first spectral band including only wavelengths below about 720 nanometers; and (b) a second spectral band including only wavelengths above about 720 nanometers. - View Dependent Claims (13, 14, 15)
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16. A system for tracking a target, comprising:
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(a) a spectral imager for acquiring first and second spectral images of a scene that includes the target; (b) a mechanism for designating a spectral reference window, in said first spectral image, that includes a respective plurality of pixel vectors; and (c) a processor for hypercorrelating said spectral reference window with said second spectral image, thereby obtaining a hypercorrelation function, a maximum whereof corresponds to a location of the target in said scene.
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17. A system for tracking a target, comprising:
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(a) a spectral imager for acquiring first and second spectral images of a scene that includes the target; (b) a panchromatic imaging mechanism for acquiring first and second panchromatic images of said scene; (c) a mechanism for designating a spectral reference window in said first spectral image; (d) a mechanism for designating a panchromatic reference window in said first panchromatic image; and (e) a processor for; (i) hypercorrelating said spectral reference window with said second spectral image, thereby obtaining a hypercorrelation function, (ii) correlating said panchromatic reference window with said second panchromatic image, thereby obtaining a correlation function, and (iii) combining said hypercorrelation function with said correlation function to obtain a joint correlation function, a maximum whereof corresponds to a location of the target in said scene.
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18. A system for tracking a target, comprising:
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(a) a spectral imager for acquiring first and second spectral images of a scene that includes the target, each said spectral image including; (i) a first spectral band including only wavelengths below about 720 nanometers, and (ii) a second spectral band including only wavelengths above about 720 nanometers; (b) a mechanism for designating a spectral reference window in said first spectral image; and (c) a processor for hypercorrelating said spectral reference window with said second spectral image, thereby obtaining a hypercorrelation function, a maximum whereof corresponds to a location of the target in said scene.
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Specification