Motion compensation for electro-optical camera imagery
First Claim
1. A process for correcting image distortion in an image array, comprising:
- generating a first rectangular array of an image of interest;
generating a second linear array of an image maintained within said image of interest;
correlating the image of said first array with the image of said second array;
determining an error between said images of said first and second arrays;
adjusting said image of said second array to correct for said error;
projecting said first and second images onto said rectangular and linear arrays by a focusing means, said arrays sharing a common focal plane for respectively receiving said image; and
generating said rectangular and linear arrays by storing charges on a plurality of charge coupled devices;
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Abstract
An apparatus (32) and technique for compensating for motion in an electro-optical camera system. An image system is maintained on an aircraft for generating an image of terrain while the aircraft is in flight. A high resolution linear array (24) generates an image from a field of view (30), while a rectangular array (26) generates a corresponding image on a periodic basis. The rectangular image serves as a reference for the pixels of the linear array for determining if features in the linear array have shifted or distorted. An error is generated corresponding to the differences between the linear array and the rectangular array, the linear array being corrected as a function of the error.
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Citations
14 Claims
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1. A process for correcting image distortion in an image array, comprising:
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generating a first rectangular array of an image of interest; generating a second linear array of an image maintained within said image of interest; correlating the image of said first array with the image of said second array; determining an error between said images of said first and second arrays; adjusting said image of said second array to correct for said error;
projecting said first and second images onto said rectangular and linear arrays by a focusing means, said arrays sharing a common focal plane for respectively receiving said image; andgenerating said rectangular and linear arrays by storing charges on a plurality of charge coupled devices; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for determining and correlating image distortion in an image array, comprising:
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first means for generating a first image; second means for generating a second image, said second image comprising a portion of said first image; correlation means interconnected between said first and second means for receiving said first and second images and comparing said second image with said portion of said first image and establishing an error signal therefrom; means connected to said correlation means, receiving said error signal, and modifying said first image as a function thereof; wherein said first means comprises a rectangular array of charge coupled devices, each such device receiving and storing a charge corresponding to a portion of said first image; wherein said second means comprises a linear array of charged coupled devices, each such device receiving and storing a charge corresponding to a portion of said second image; and
focusing means for respectively projecting said first and second images onto said rectangular and linear arrays, said arrays sharing a common focal plane for receiving said images. - View Dependent Claims (11, 12, 13, 14)
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Specification